./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_20-1.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_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_20-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB --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 0642f258b99d0be7a55bf1ef77240ba2f36dd3da56337cf262b8aebc4e0cc323 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 03:53:57,806 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 03:53:57,898 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 03:53:57,904 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 03:53:57,904 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 03:53:57,929 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 03:53:57,929 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 03:53:57,930 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 03:53:57,930 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 03:53:57,930 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 03:53:57,930 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 03:53:57,931 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 03:53:57,931 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 03:53:57,931 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 03:53:57,931 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 03:53:57,932 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 03:53:57,932 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 03:53:57,932 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 03:53:57,932 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 03:53:57,932 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 03:53:57,932 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 03:53:57,932 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 03:53:57,932 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 03:53:57,933 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 03:53:57,933 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 03:53:57,933 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 03:53:57,933 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 03:53:57,933 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 03:53:57,933 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 03:53:57,933 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:53:57,934 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:53:57,934 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:53:57,935 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:53:57,935 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 03:53:57,935 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:53:57,935 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:53:57,935 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:53:57,935 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:53:57,936 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 03:53:57,936 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 03:53:57,936 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 03:53:57,936 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 03:53:57,936 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 03:53:57,936 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 03:53:57,937 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 03:53:57,937 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 03:53:57,937 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 03:53:57,937 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 03:53:57,937 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_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB 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 -> 0642f258b99d0be7a55bf1ef77240ba2f36dd3da56337cf262b8aebc4e0cc323 [2024-11-28 03:53:58,278 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 03:53:58,287 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 03:53:58,290 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 03:53:58,291 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 03:53:58,292 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 03:53:58,293 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/recursive-simple/fibo_2calls_20-1.c [2024-11-28 03:54:01,494 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/data/987d0b67a/85c40e4306274d7383433fd9594c11a4/FLAG99e1974b6 [2024-11-28 03:54:01,802 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 03:54:01,803 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/sv-benchmarks/c/recursive-simple/fibo_2calls_20-1.c [2024-11-28 03:54:01,810 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/data/987d0b67a/85c40e4306274d7383433fd9594c11a4/FLAG99e1974b6 [2024-11-28 03:54:02,092 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/data/987d0b67a/85c40e4306274d7383433fd9594c11a4 [2024-11-28 03:54:02,095 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 03:54:02,096 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 03:54:02,098 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 03:54:02,098 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 03:54:02,103 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 03:54:02,104 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:54:02" (1/1) ... [2024-11-28 03:54:02,106 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4adbfed4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:54:02, skipping insertion in model container [2024-11-28 03:54:02,106 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:54:02" (1/1) ... [2024-11-28 03:54:02,122 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 03:54:02,316 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_2797720b-d97d-4c59-af40-2a1c581cba60/sv-benchmarks/c/recursive-simple/fibo_2calls_20-1.c[951,964] [2024-11-28 03:54:02,321 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:54:02,335 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 03:54:02,351 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_2797720b-d97d-4c59-af40-2a1c581cba60/sv-benchmarks/c/recursive-simple/fibo_2calls_20-1.c[951,964] [2024-11-28 03:54:02,352 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:54:02,368 INFO L204 MainTranslator]: Completed translation [2024-11-28 03:54:02,369 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:54:02 WrapperNode [2024-11-28 03:54:02,369 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 03:54:02,370 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 03:54:02,371 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 03:54:02,371 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 03:54:02,380 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:54:02" (1/1) ... [2024-11-28 03:54:02,391 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:54:02" (1/1) ... [2024-11-28 03:54:02,410 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2024-11-28 03:54:02,410 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 03:54:02,411 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 03:54:02,411 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 03:54:02,411 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 03:54:02,422 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:54:02" (1/1) ... [2024-11-28 03:54:02,422 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:54:02" (1/1) ... [2024-11-28 03:54:02,423 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:54:02" (1/1) ... [2024-11-28 03:54:02,437 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]. [2024-11-28 03:54:02,438 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:54:02" (1/1) ... [2024-11-28 03:54:02,438 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:54:02" (1/1) ... [2024-11-28 03:54:02,441 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:54:02" (1/1) ... [2024-11-28 03:54:02,442 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:54:02" (1/1) ... [2024-11-28 03:54:02,444 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:54:02" (1/1) ... [2024-11-28 03:54:02,445 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:54:02" (1/1) ... [2024-11-28 03:54:02,446 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:54:02" (1/1) ... [2024-11-28 03:54:02,448 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 03:54:02,449 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 03:54:02,449 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 03:54:02,449 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 03:54:02,450 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:54:02" (1/1) ... [2024-11-28 03:54:02,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:54:02,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:54:02,494 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 03:54:02,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 03:54:02,536 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 03:54:02,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 03:54:02,536 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2024-11-28 03:54:02,536 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2024-11-28 03:54:02,536 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2024-11-28 03:54:02,536 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2024-11-28 03:54:02,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 03:54:02,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 03:54:02,608 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 03:54:02,610 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 03:54:02,753 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-11-28 03:54:02,753 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 03:54:02,763 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 03:54:02,763 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-28 03:54:02,764 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:54:02 BoogieIcfgContainer [2024-11-28 03:54:02,764 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 03:54:02,766 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 03:54:02,766 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 03:54:02,772 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 03:54:02,772 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:54:02" (1/3) ... [2024-11-28 03:54:02,773 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30a32995 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:54:02, skipping insertion in model container [2024-11-28 03:54:02,773 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:54:02" (2/3) ... [2024-11-28 03:54:02,774 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30a32995 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:54:02, skipping insertion in model container [2024-11-28 03:54:02,774 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:54:02" (3/3) ... [2024-11-28 03:54:02,775 INFO L128 eAbstractionObserver]: Analyzing ICFG fibo_2calls_20-1.c [2024-11-28 03:54:02,793 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 03:54:02,795 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fibo_2calls_20-1.c that has 3 procedures, 29 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2024-11-28 03:54:02,852 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 03:54:02,870 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;@1bbb0830, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 03:54:02,870 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-28 03:54:02,875 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) [2024-11-28 03:54:02,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-28 03:54:02,884 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:54:02,885 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:54:02,885 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:54:02,892 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:54:02,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1123300790, now seen corresponding path program 1 times [2024-11-28 03:54:02,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:54:02,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770730499] [2024-11-28 03:54:02,903 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:54:02,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:54:03,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:54:03,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:54:03,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:54:03,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770730499] [2024-11-28 03:54:03,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770730499] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:54:03,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:54:03,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:54:03,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718919249] [2024-11-28 03:54:03,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:54:03,285 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:54:03,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:54:03,312 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:54:03,313 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:54:03,315 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, 5 states have (on average 1.6) internal successors, (8), 4 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) [2024-11-28 03:54:03,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:54:03,399 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2024-11-28 03:54:03,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:54:03,404 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 [2024-11-28 03:54:03,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:54:03,416 INFO L225 Difference]: With dead ends: 39 [2024-11-28 03:54:03,416 INFO L226 Difference]: Without dead ends: 27 [2024-11-28 03:54:03,421 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:54:03,427 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:54:03,428 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 124 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 03:54:03,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-28 03:54:03,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-28 03:54:03,472 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) [2024-11-28 03:54:03,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2024-11-28 03:54:03,478 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2024-11-28 03:54:03,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:54:03,479 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2024-11-28 03:54:03,479 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2024-11-28 03:54:03,479 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2024-11-28 03:54:03,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-28 03:54:03,480 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:54:03,481 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:54:03,481 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 03:54:03,482 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:54:03,482 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:54:03,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1177745932, now seen corresponding path program 1 times [2024-11-28 03:54:03,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:54:03,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094794968] [2024-11-28 03:54:03,483 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:54:03,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:54:03,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:54:03,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:54:03,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:54:03,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094794968] [2024-11-28 03:54:03,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094794968] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:54:03,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:54:03,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:54:03,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168072694] [2024-11-28 03:54:03,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:54:03,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:54:03,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:54:03,593 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:54:03,593 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:54:03,593 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 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) [2024-11-28 03:54:03,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:54:03,630 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2024-11-28 03:54:03,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:54:03,631 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 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 [2024-11-28 03:54:03,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:54:03,633 INFO L225 Difference]: With dead ends: 33 [2024-11-28 03:54:03,633 INFO L226 Difference]: Without dead ends: 29 [2024-11-28 03:54:03,633 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 [2024-11-28 03:54:03,634 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:54:03,635 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 125 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 03:54:03,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-28 03:54:03,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2024-11-28 03:54:03,646 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) [2024-11-28 03:54:03,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2024-11-28 03:54:03,647 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2024-11-28 03:54:03,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:54:03,647 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2024-11-28 03:54:03,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 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) [2024-11-28 03:54:03,648 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2024-11-28 03:54:03,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-28 03:54:03,649 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:54:03,649 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] [2024-11-28 03:54:03,649 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 03:54:03,650 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:54:03,650 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:54:03,650 INFO L85 PathProgramCache]: Analyzing trace with hash 2110588723, now seen corresponding path program 1 times [2024-11-28 03:54:03,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:54:03,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31656508] [2024-11-28 03:54:03,651 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:54:03,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:54:03,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:54:03,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:54:03,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:54:03,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31656508] [2024-11-28 03:54:03,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31656508] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:54:03,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986536703] [2024-11-28 03:54:03,917 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:54:03,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:54:03,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:54:03,923 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:54:03,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 03:54:04,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:54:04,012 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 03:54:04,022 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:54:04,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:54:04,155 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:54:04,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:54:04,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986536703] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:54:04,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:54:04,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2024-11-28 03:54:04,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002422874] [2024-11-28 03:54:04,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:54:04,518 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 03:54:04,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:54:04,519 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 03:54:04,519 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-11-28 03:54:04,519 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) [2024-11-28 03:54:04,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:54:04,701 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2024-11-28 03:54:04,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 03:54:04,702 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 [2024-11-28 03:54:04,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:54:04,703 INFO L225 Difference]: With dead ends: 55 [2024-11-28 03:54:04,703 INFO L226 Difference]: Without dead ends: 31 [2024-11-28 03:54:04,703 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-11-28 03:54:04,704 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 22 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:54:04,705 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 105 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:54:04,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-28 03:54:04,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2024-11-28 03:54:04,712 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) [2024-11-28 03:54:04,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2024-11-28 03:54:04,716 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2024-11-28 03:54:04,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:54:04,717 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2024-11-28 03:54:04,717 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) [2024-11-28 03:54:04,717 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2024-11-28 03:54:04,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-28 03:54:04,718 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:54:04,718 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] [2024-11-28 03:54:04,728 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 03:54:04,919 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:54:04,920 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:54:04,920 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:54:04,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1277869167, now seen corresponding path program 1 times [2024-11-28 03:54:04,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:54:04,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850395585] [2024-11-28 03:54:04,920 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:54:04,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:54:04,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:54:05,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:54:05,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:54:05,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850395585] [2024-11-28 03:54:05,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850395585] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:54:05,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379344485] [2024-11-28 03:54:05,064 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:54:05,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:54:05,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:54:05,067 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:54:05,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 03:54:05,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:54:05,118 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 03:54:05,119 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:54:05,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:54:05,169 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:54:05,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:54:05,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379344485] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:54:05,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:54:05,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2024-11-28 03:54:05,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321778172] [2024-11-28 03:54:05,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:54:05,452 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 03:54:05,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:54:05,453 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 03:54:05,453 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-28 03:54:05,453 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) [2024-11-28 03:54:05,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:54:05,635 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2024-11-28 03:54:05,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 03:54:05,636 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 [2024-11-28 03:54:05,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:54:05,637 INFO L225 Difference]: With dead ends: 40 [2024-11-28 03:54:05,637 INFO L226 Difference]: Without dead ends: 36 [2024-11-28 03:54:05,638 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 [2024-11-28 03:54:05,639 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 13 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:54:05,639 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 135 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:54:05,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-28 03:54:05,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2024-11-28 03:54:05,649 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) [2024-11-28 03:54:05,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2024-11-28 03:54:05,651 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 24 [2024-11-28 03:54:05,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:54:05,651 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2024-11-28 03:54:05,651 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) [2024-11-28 03:54:05,651 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2024-11-28 03:54:05,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-28 03:54:05,652 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:54:05,653 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] [2024-11-28 03:54:05,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 03:54:05,853 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:54:05,854 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:54:05,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:54:05,854 INFO L85 PathProgramCache]: Analyzing trace with hash -2061621832, now seen corresponding path program 1 times [2024-11-28 03:54:05,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:54:05,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951357392] [2024-11-28 03:54:05,855 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:54:05,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:54:05,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:54:06,011 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:54:06,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:54:06,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951357392] [2024-11-28 03:54:06,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951357392] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:54:06,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523568006] [2024-11-28 03:54:06,011 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:54:06,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:54:06,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:54:06,013 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:54:06,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 03:54:06,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:54:06,066 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:54:06,068 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:54:06,153 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 03:54:06,154 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:54:06,630 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 03:54:06,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523568006] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:54:06,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:54:06,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 14 [2024-11-28 03:54:06,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449206208] [2024-11-28 03:54:06,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:54:06,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 03:54:06,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:54:06,632 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 03:54:06,632 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-11-28 03:54:06,632 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) [2024-11-28 03:54:06,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:54:06,882 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2024-11-28 03:54:06,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 03:54:06,883 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 [2024-11-28 03:54:06,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:54:06,884 INFO L225 Difference]: With dead ends: 69 [2024-11-28 03:54:06,885 INFO L226 Difference]: Without dead ends: 38 [2024-11-28 03:54:06,885 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-11-28 03:54:06,886 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 18 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:54:06,887 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 146 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 03:54:06,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-28 03:54:06,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2024-11-28 03:54:06,895 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) [2024-11-28 03:54:06,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2024-11-28 03:54:06,896 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 36 [2024-11-28 03:54:06,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:54:06,897 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2024-11-28 03:54:06,897 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) [2024-11-28 03:54:06,897 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2024-11-28 03:54:06,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-28 03:54:06,898 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:54:06,899 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] [2024-11-28 03:54:06,910 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 03:54:07,102 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:54:07,103 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:54:07,103 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:54:07,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1167294498, now seen corresponding path program 1 times [2024-11-28 03:54:07,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:54:07,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153680017] [2024-11-28 03:54:07,103 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:54:07,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:54:07,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:54:07,328 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 03:54:07,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:54:07,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153680017] [2024-11-28 03:54:07,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153680017] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:54:07,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116044999] [2024-11-28 03:54:07,329 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:54:07,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:54:07,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:54:07,332 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:54:07,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 03:54:07,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:54:07,388 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:54:07,390 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:54:07,515 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:54:07,516 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:54:08,036 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 03:54:08,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116044999] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:54:08,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:54:08,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 18 [2024-11-28 03:54:08,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667599171] [2024-11-28 03:54:08,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:54:08,037 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 03:54:08,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:54:08,039 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 03:54:08,039 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2024-11-28 03:54:08,039 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) [2024-11-28 03:54:08,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:54:08,678 INFO L93 Difference]: Finished difference Result 101 states and 161 transitions. [2024-11-28 03:54:08,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 03:54:08,679 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 [2024-11-28 03:54:08,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:54:08,681 INFO L225 Difference]: With dead ends: 101 [2024-11-28 03:54:08,681 INFO L226 Difference]: Without dead ends: 68 [2024-11-28 03:54:08,682 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2024-11-28 03:54:08,683 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 39 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 03:54:08,684 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 300 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 03:54:08,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-28 03:54:08,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 56. [2024-11-28 03:54:08,699 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) [2024-11-28 03:54:08,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 86 transitions. [2024-11-28 03:54:08,702 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 86 transitions. Word has length 37 [2024-11-28 03:54:08,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:54:08,702 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 86 transitions. [2024-11-28 03:54:08,702 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) [2024-11-28 03:54:08,703 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 86 transitions. [2024-11-28 03:54:08,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-28 03:54:08,705 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:54:08,705 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] [2024-11-28 03:54:08,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-28 03:54:08,906 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:54:08,906 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:54:08,907 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:54:08,907 INFO L85 PathProgramCache]: Analyzing trace with hash 384535367, now seen corresponding path program 1 times [2024-11-28 03:54:08,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:54:08,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721256850] [2024-11-28 03:54:08,907 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:54:08,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:54:08,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:54:09,089 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-28 03:54:09,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:54:09,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721256850] [2024-11-28 03:54:09,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721256850] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:54:09,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663382085] [2024-11-28 03:54:09,090 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:54:09,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:54:09,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:54:09,092 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:54:09,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 03:54:09,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:54:09,167 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 03:54:09,169 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:54:09,311 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-28 03:54:09,311 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:54:10,069 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 03:54:10,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663382085] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:54:10,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:54:10,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 17 [2024-11-28 03:54:10,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487898099] [2024-11-28 03:54:10,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:54:10,073 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 03:54:10,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:54:10,074 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 03:54:10,074 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2024-11-28 03:54:10,074 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) [2024-11-28 03:54:10,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:54:10,371 INFO L93 Difference]: Finished difference Result 102 states and 193 transitions. [2024-11-28 03:54:10,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 03:54:10,372 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 [2024-11-28 03:54:10,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:54:10,375 INFO L225 Difference]: With dead ends: 102 [2024-11-28 03:54:10,375 INFO L226 Difference]: Without dead ends: 98 [2024-11-28 03:54:10,376 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 92 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2024-11-28 03:54:10,377 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 35 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:54:10,377 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 161 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 03:54:10,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-11-28 03:54:10,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2024-11-28 03:54:10,400 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) [2024-11-28 03:54:10,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 106 transitions. [2024-11-28 03:54:10,402 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 106 transitions. Word has length 51 [2024-11-28 03:54:10,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:54:10,403 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 106 transitions. [2024-11-28 03:54:10,403 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) [2024-11-28 03:54:10,403 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 106 transitions. [2024-11-28 03:54:10,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-28 03:54:10,407 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:54:10,408 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:54:10,419 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 03:54:10,611 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:54:10,612 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:54:10,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:54:10,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1770426885, now seen corresponding path program 1 times [2024-11-28 03:54:10,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:54:10,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805561895] [2024-11-28 03:54:10,612 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:54:10,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:54:10,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:54:10,898 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 44 proven. 81 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2024-11-28 03:54:10,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:54:10,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805561895] [2024-11-28 03:54:10,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805561895] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:54:10,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099076156] [2024-11-28 03:54:10,899 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:54:10,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:54:10,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:54:10,901 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:54:10,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 03:54:10,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:54:10,985 INFO L256 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 03:54:11,007 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:54:11,214 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 17 proven. 119 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-11-28 03:54:11,214 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:54:12,581 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 17 proven. 129 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2024-11-28 03:54:12,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099076156] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:54:12,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:54:12,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 23 [2024-11-28 03:54:12,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498162897] [2024-11-28 03:54:12,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:54:12,583 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 03:54:12,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:54:12,584 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 03:54:12,585 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2024-11-28 03:54:12,585 INFO L87 Difference]: Start difference. First operand 64 states and 106 transitions. Second operand has 23 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 23 states have internal predecessors, (75), 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) [2024-11-28 03:54:13,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:54:13,520 INFO L93 Difference]: Finished difference Result 177 states and 369 transitions. [2024-11-28 03:54:13,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-28 03:54:13,521 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 23 states have internal predecessors, (75), 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 107 [2024-11-28 03:54:13,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:54:13,527 INFO L225 Difference]: With dead ends: 177 [2024-11-28 03:54:13,527 INFO L226 Difference]: Without dead ends: 104 [2024-11-28 03:54:13,534 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 197 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=263, Invalid=1297, Unknown=0, NotChecked=0, Total=1560 [2024-11-28 03:54:13,535 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 78 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 03:54:13,537 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 352 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 03:54:13,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-11-28 03:54:13,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2024-11-28 03:54:13,573 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) [2024-11-28 03:54:13,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 132 transitions. [2024-11-28 03:54:13,575 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 132 transitions. Word has length 107 [2024-11-28 03:54:13,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:54:13,578 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 132 transitions. [2024-11-28 03:54:13,578 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 23 states have internal predecessors, (75), 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) [2024-11-28 03:54:13,578 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 132 transitions. [2024-11-28 03:54:13,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2024-11-28 03:54:13,590 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:54:13,590 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 9, 9, 9, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:54:13,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 03:54:13,791 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:54:13,791 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:54:13,791 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:54:13,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1566869308, now seen corresponding path program 1 times [2024-11-28 03:54:13,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:54:13,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475848847] [2024-11-28 03:54:13,792 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:54:13,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:54:13,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:54:14,127 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 42 proven. 158 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2024-11-28 03:54:14,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:54:14,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475848847] [2024-11-28 03:54:14,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475848847] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:54:14,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274869217] [2024-11-28 03:54:14,128 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:54:14,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:54:14,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:54:14,130 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:54:14,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 03:54:14,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:54:14,245 INFO L256 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 03:54:14,248 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:54:14,441 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 29 proven. 212 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2024-11-28 03:54:14,442 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:54:16,179 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 29 proven. 228 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2024-11-28 03:54:16,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274869217] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:54:16,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:54:16,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 15] total 23 [2024-11-28 03:54:16,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320881086] [2024-11-28 03:54:16,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:54:16,181 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 03:54:16,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:54:16,181 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 03:54:16,182 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2024-11-28 03:54:16,182 INFO L87 Difference]: Start difference. First operand 93 states and 132 transitions. Second operand has 23 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 23 states have internal predecessors, (77), 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) [2024-11-28 03:54:16,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:54:16,597 INFO L93 Difference]: Finished difference Result 132 states and 227 transitions. [2024-11-28 03:54:16,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 03:54:16,598 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 23 states have internal predecessors, (77), 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 146 [2024-11-28 03:54:16,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:54:16,601 INFO L225 Difference]: With dead ends: 132 [2024-11-28 03:54:16,601 INFO L226 Difference]: Without dead ends: 128 [2024-11-28 03:54:16,603 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 276 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=191, Invalid=801, Unknown=0, NotChecked=0, Total=992 [2024-11-28 03:54:16,604 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 47 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 03:54:16,604 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 209 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 03:54:16,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-11-28 03:54:16,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 118. [2024-11-28 03:54:16,640 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) [2024-11-28 03:54:16,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 194 transitions. [2024-11-28 03:54:16,649 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 194 transitions. Word has length 146 [2024-11-28 03:54:16,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:54:16,650 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 194 transitions. [2024-11-28 03:54:16,650 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 23 states have internal predecessors, (77), 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) [2024-11-28 03:54:16,650 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 194 transitions. [2024-11-28 03:54:16,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2024-11-28 03:54:16,661 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:54:16,661 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] [2024-11-28 03:54:16,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-28 03:54:16,861 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:54:16,864 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:54:16,865 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:54:16,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1279109938, now seen corresponding path program 2 times [2024-11-28 03:54:16,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:54:16,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242188230] [2024-11-28 03:54:16,866 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:54:16,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:54:16,964 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:54:16,964 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:54:17,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2233 backedges. 158 proven. 490 refuted. 0 times theorem prover too weak. 1585 trivial. 0 not checked. [2024-11-28 03:54:17,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:54:17,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242188230] [2024-11-28 03:54:17,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242188230] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:54:17,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139648745] [2024-11-28 03:54:17,614 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:54:17,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:54:17,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:54:17,617 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:54:17,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 03:54:17,798 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:54:17,799 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:54:17,806 INFO L256 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 03:54:17,812 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:54:18,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2233 backedges. 87 proven. 569 refuted. 0 times theorem prover too weak. 1577 trivial. 0 not checked. [2024-11-28 03:54:18,040 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:54:20,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2233 backedges. 87 proven. 593 refuted. 0 times theorem prover too weak. 1553 trivial. 0 not checked. [2024-11-28 03:54:20,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139648745] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:54:20,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:54:20,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 17] total 29 [2024-11-28 03:54:20,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254822211] [2024-11-28 03:54:20,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:54:20,742 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 03:54:20,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:54:20,743 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 03:54:20,743 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2024-11-28 03:54:20,743 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) [2024-11-28 03:54:21,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:54:21,787 INFO L93 Difference]: Finished difference Result 323 states and 666 transitions. [2024-11-28 03:54:21,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-28 03:54:21,788 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 [2024-11-28 03:54:21,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:54:21,793 INFO L225 Difference]: With dead ends: 323 [2024-11-28 03:54:21,793 INFO L226 Difference]: Without dead ends: 214 [2024-11-28 03:54:21,796 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 606 GetRequests, 547 SyntacticMatches, 7 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=449, Invalid=2413, Unknown=0, NotChecked=0, Total=2862 [2024-11-28 03:54:21,800 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 129 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 03:54:21,800 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 481 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 03:54:21,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2024-11-28 03:54:21,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 184. [2024-11-28 03:54:21,839 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) [2024-11-28 03:54:21,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 301 transitions. [2024-11-28 03:54:21,842 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 301 transitions. Word has length 284 [2024-11-28 03:54:21,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:54:21,843 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 301 transitions. [2024-11-28 03:54:21,843 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) [2024-11-28 03:54:21,843 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 301 transitions. [2024-11-28 03:54:21,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2024-11-28 03:54:21,851 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:54:21,854 INFO L218 NwaCegarLoop]: trace histogram [26, 26, 23, 23, 20, 18, 13, 13, 13, 13, 13, 13, 13, 11, 11, 11, 11, 11, 11, 11, 9, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:54:21,864 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 03:54:22,055 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:54:22,055 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:54:22,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:54:22,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1509408310, now seen corresponding path program 3 times [2024-11-28 03:54:22,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:54:22,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365936421] [2024-11-28 03:54:22,056 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:54:22,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:54:22,114 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-28 03:54:22,116 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:54:22,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3187 backedges. 488 proven. 80 refuted. 0 times theorem prover too weak. 2619 trivial. 0 not checked. [2024-11-28 03:54:22,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:54:22,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365936421] [2024-11-28 03:54:22,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365936421] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:54:22,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113934856] [2024-11-28 03:54:22,353 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:54:22,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:54:22,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:54:22,356 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:54:22,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 03:54:22,509 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-28 03:54:22,509 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:54:22,510 INFO L256 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 03:54:22,517 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:54:22,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3187 backedges. 496 proven. 83 refuted. 0 times theorem prover too weak. 2608 trivial. 0 not checked. [2024-11-28 03:54:22,622 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:54:24,433 INFO L134 CoverageAnalysis]: Checked inductivity of 3187 backedges. 500 proven. 89 refuted. 0 times theorem prover too weak. 2598 trivial. 0 not checked. [2024-11-28 03:54:24,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113934856] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:54:24,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:54:24,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 18 [2024-11-28 03:54:24,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575398328] [2024-11-28 03:54:24,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:54:24,436 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 03:54:24,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:54:24,437 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 03:54:24,437 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2024-11-28 03:54:24,437 INFO L87 Difference]: Start difference. First operand 184 states and 301 transitions. Second operand has 18 states, 16 states have (on average 4.0) internal successors, (64), 18 states have internal predecessors, (64), 12 states have call successors, (19), 1 states have call predecessors, (19), 7 states have return successors, (22), 10 states have call predecessors, (22), 12 states have call successors, (22) [2024-11-28 03:54:24,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:54:24,744 INFO L93 Difference]: Finished difference Result 255 states and 465 transitions. [2024-11-28 03:54:24,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 03:54:24,744 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), 12 states have call successors, (19), 1 states have call predecessors, (19), 7 states have return successors, (22), 10 states have call predecessors, (22), 12 states have call successors, (22) Word has length 336 [2024-11-28 03:54:24,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:54:24,752 INFO L225 Difference]: With dead ends: 255 [2024-11-28 03:54:24,752 INFO L226 Difference]: Without dead ends: 251 [2024-11-28 03:54:24,753 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 687 GetRequests, 662 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2024-11-28 03:54:24,754 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 41 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:54:24,754 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 164 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 03:54:24,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2024-11-28 03:54:24,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 224. [2024-11-28 03:54:24,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 148 states have (on average 1.1689189189189189) internal successors, (173), 149 states have internal predecessors, (173), 45 states have call successors, (45), 20 states have call predecessors, (45), 30 states have return successors, (187), 54 states have call predecessors, (187), 45 states have call successors, (187) [2024-11-28 03:54:24,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 405 transitions. [2024-11-28 03:54:24,815 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 405 transitions. Word has length 336 [2024-11-28 03:54:24,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:54:24,818 INFO L471 AbstractCegarLoop]: Abstraction has 224 states and 405 transitions. [2024-11-28 03:54:24,818 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), 12 states have call successors, (19), 1 states have call predecessors, (19), 7 states have return successors, (22), 10 states have call predecessors, (22), 12 states have call successors, (22) [2024-11-28 03:54:24,819 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 405 transitions. [2024-11-28 03:54:24,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2024-11-28 03:54:24,840 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:54:24,840 INFO L218 NwaCegarLoop]: trace histogram [42, 42, 30, 29, 29, 24, 21, 21, 21, 21, 21, 21, 21, 16, 14, 14, 14, 14, 14, 14, 14, 12, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:54:24,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-28 03:54:25,040 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-28 03:54:25,041 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:54:25,041 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:54:25,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1192940537, now seen corresponding path program 4 times [2024-11-28 03:54:25,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:54:25,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639332647] [2024-11-28 03:54:25,042 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:54:25,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:54:25,186 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:54:25,186 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:54:25,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6983 backedges. 182 proven. 720 refuted. 0 times theorem prover too weak. 6081 trivial. 0 not checked. [2024-11-28 03:54:25,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:54:25,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639332647] [2024-11-28 03:54:25,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639332647] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:54:25,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012381104] [2024-11-28 03:54:25,575 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:54:25,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:54:25,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:54:25,577 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:54:25,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 03:54:25,813 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:54:25,813 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:54:25,817 INFO L256 TraceCheckSpWp]: Trace formula consists of 858 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:54:25,825 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:54:25,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6983 backedges. 1267 proven. 6 refuted. 0 times theorem prover too weak. 5710 trivial. 0 not checked. [2024-11-28 03:54:25,903 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:54:27,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6983 backedges. 188 proven. 860 refuted. 0 times theorem prover too weak. 5935 trivial. 0 not checked. [2024-11-28 03:54:27,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012381104] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:54:27,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:54:27,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2024-11-28 03:54:27,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106547382] [2024-11-28 03:54:27,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:54:27,717 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 03:54:27,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:54:27,718 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 03:54:27,719 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-11-28 03:54:27,719 INFO L87 Difference]: Start difference. First operand 224 states and 405 transitions. Second operand has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 7 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (20), 5 states have call predecessors, (20), 7 states have call successors, (20) [2024-11-28 03:54:27,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:54:27,913 INFO L93 Difference]: Finished difference Result 412 states and 767 transitions. [2024-11-28 03:54:27,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 03:54:27,914 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 7 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (20), 5 states have call predecessors, (20), 7 states have call successors, (20) Word has length 484 [2024-11-28 03:54:27,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:54:27,917 INFO L225 Difference]: With dead ends: 412 [2024-11-28 03:54:27,917 INFO L226 Difference]: Without dead ends: 193 [2024-11-28 03:54:27,920 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 980 GetRequests, 958 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2024-11-28 03:54:27,920 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 23 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:54:27,920 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 153 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:54:27,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2024-11-28 03:54:27,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 186. [2024-11-28 03:54:27,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 125 states have (on average 1.16) internal successors, (145), 124 states have internal predecessors, (145), 37 states have call successors, (37), 19 states have call predecessors, (37), 23 states have return successors, (112), 42 states have call predecessors, (112), 37 states have call successors, (112) [2024-11-28 03:54:27,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 294 transitions. [2024-11-28 03:54:27,943 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 294 transitions. Word has length 484 [2024-11-28 03:54:27,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:54:27,943 INFO L471 AbstractCegarLoop]: Abstraction has 186 states and 294 transitions. [2024-11-28 03:54:27,944 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 7 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (20), 5 states have call predecessors, (20), 7 states have call successors, (20) [2024-11-28 03:54:27,944 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 294 transitions. [2024-11-28 03:54:27,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2024-11-28 03:54:27,951 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:54:27,951 INFO L218 NwaCegarLoop]: trace histogram [26, 26, 25, 25, 21, 20, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 8, 8, 6, 4, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:54:27,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-28 03:54:28,151 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-28 03:54:28,152 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:54:28,152 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:54:28,152 INFO L85 PathProgramCache]: Analyzing trace with hash -240108639, now seen corresponding path program 5 times [2024-11-28 03:54:28,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:54:28,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006915887] [2024-11-28 03:54:28,153 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:54:28,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:54:28,171 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 03:54:28,171 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:54:28,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3476 backedges. 183 proven. 538 refuted. 0 times theorem prover too weak. 2755 trivial. 0 not checked. [2024-11-28 03:54:28,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:54:28,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006915887] [2024-11-28 03:54:28,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006915887] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:54:28,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41805428] [2024-11-28 03:54:28,288 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:54:28,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:54:28,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:54:28,291 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:54:28,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 03:54:28,425 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 03:54:28,425 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:54:28,426 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 03:54:28,439 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:54:28,575 INFO L134 CoverageAnalysis]: Checked inductivity of 3476 backedges. 1045 proven. 13 refuted. 0 times theorem prover too weak. 2418 trivial. 0 not checked. [2024-11-28 03:54:28,576 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:54:30,236 INFO L134 CoverageAnalysis]: Checked inductivity of 3476 backedges. 183 proven. 538 refuted. 0 times theorem prover too weak. 2755 trivial. 0 not checked. [2024-11-28 03:54:30,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41805428] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:54:30,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:54:30,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 17 [2024-11-28 03:54:30,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340360323] [2024-11-28 03:54:30,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:54:30,238 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 03:54:30,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:54:30,239 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 03:54:30,239 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2024-11-28 03:54:30,239 INFO L87 Difference]: Start difference. First operand 186 states and 294 transitions. Second operand has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 8 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (22), 6 states have call predecessors, (22), 8 states have call successors, (22) [2024-11-28 03:54:30,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:54:30,431 INFO L93 Difference]: Finished difference Result 345 states and 585 transitions. [2024-11-28 03:54:30,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 03:54:30,432 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 8 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (22), 6 states have call predecessors, (22), 8 states have call successors, (22) Word has length 351 [2024-11-28 03:54:30,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:54:30,435 INFO L225 Difference]: With dead ends: 345 [2024-11-28 03:54:30,435 INFO L226 Difference]: Without dead ends: 147 [2024-11-28 03:54:30,437 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 714 GetRequests, 692 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2024-11-28 03:54:30,438 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 20 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:54:30,438 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 163 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:54:30,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-11-28 03:54:30,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2024-11-28 03:54:30,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 101 states have (on average 1.1683168316831682) internal successors, (118), 100 states have internal predecessors, (118), 27 states have call successors, (27), 17 states have call predecessors, (27), 18 states have return successors, (77), 29 states have call predecessors, (77), 27 states have call successors, (77) [2024-11-28 03:54:30,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 222 transitions. [2024-11-28 03:54:30,459 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 222 transitions. Word has length 351 [2024-11-28 03:54:30,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:54:30,460 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 222 transitions. [2024-11-28 03:54:30,460 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 8 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (22), 6 states have call predecessors, (22), 8 states have call successors, (22) [2024-11-28 03:54:30,460 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 222 transitions. [2024-11-28 03:54:30,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2024-11-28 03:54:30,463 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:54:30,464 INFO L218 NwaCegarLoop]: trace histogram [30, 30, 29, 29, 25, 22, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 10, 8, 8, 4, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:54:30,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-28 03:54:30,667 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-28 03:54:30,667 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:54:30,668 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:54:30,668 INFO L85 PathProgramCache]: Analyzing trace with hash 5991049, now seen corresponding path program 6 times [2024-11-28 03:54:30,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:54:30,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755564384] [2024-11-28 03:54:30,668 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:54:30,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:54:30,746 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2024-11-28 03:54:30,746 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:54:31,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4679 backedges. 785 proven. 94 refuted. 0 times theorem prover too weak. 3800 trivial. 0 not checked. [2024-11-28 03:54:31,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:54:31,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755564384] [2024-11-28 03:54:31,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755564384] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:54:31,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086609913] [2024-11-28 03:54:31,274 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:54:31,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:54:31,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:54:31,282 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:54:31,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 03:54:31,524 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2024-11-28 03:54:31,524 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:54:31,527 INFO L256 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 03:54:31,538 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:54:31,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4679 backedges. 253 proven. 611 refuted. 0 times theorem prover too weak. 3815 trivial. 0 not checked. [2024-11-28 03:54:31,770 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:54:34,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4679 backedges. 255 proven. 625 refuted. 0 times theorem prover too weak. 3799 trivial. 0 not checked. [2024-11-28 03:54:34,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086609913] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:54:34,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:54:34,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 15] total 28 [2024-11-28 03:54:34,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13384268] [2024-11-28 03:54:34,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:54:34,214 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 03:54:34,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:54:34,215 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 03:54:34,215 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2024-11-28 03:54:34,216 INFO L87 Difference]: Start difference. First operand 147 states and 222 transitions. Second operand has 28 states, 26 states have (on average 3.423076923076923) internal successors, (89), 28 states have internal predecessors, (89), 18 states have call successors, (26), 1 states have call predecessors, (26), 13 states have return successors, (33), 16 states have call predecessors, (33), 18 states have call successors, (33) [2024-11-28 03:54:35,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:54:35,172 INFO L93 Difference]: Finished difference Result 423 states and 742 transitions. [2024-11-28 03:54:35,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-28 03:54:35,173 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 3.423076923076923) internal successors, (89), 28 states have internal predecessors, (89), 18 states have call successors, (26), 1 states have call predecessors, (26), 13 states have return successors, (33), 16 states have call predecessors, (33), 18 states have call successors, (33) Word has length 405 [2024-11-28 03:54:35,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:54:35,177 INFO L225 Difference]: With dead ends: 423 [2024-11-28 03:54:35,177 INFO L226 Difference]: Without dead ends: 278 [2024-11-28 03:54:35,180 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 849 GetRequests, 791 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=465, Invalid=2397, Unknown=0, NotChecked=0, Total=2862 [2024-11-28 03:54:35,180 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 131 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 03:54:35,181 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 384 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 03:54:35,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2024-11-28 03:54:35,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 199. [2024-11-28 03:54:35,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 136 states have (on average 1.1838235294117647) internal successors, (161), 134 states have internal predecessors, (161), 41 states have call successors, (41), 24 states have call predecessors, (41), 21 states have return successors, (119), 40 states have call predecessors, (119), 41 states have call successors, (119) [2024-11-28 03:54:35,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 321 transitions. [2024-11-28 03:54:35,213 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 321 transitions. Word has length 405 [2024-11-28 03:54:35,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:54:35,215 INFO L471 AbstractCegarLoop]: Abstraction has 199 states and 321 transitions. [2024-11-28 03:54:35,216 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 3.423076923076923) internal successors, (89), 28 states have internal predecessors, (89), 18 states have call successors, (26), 1 states have call predecessors, (26), 13 states have return successors, (33), 16 states have call predecessors, (33), 18 states have call successors, (33) [2024-11-28 03:54:35,216 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 321 transitions. [2024-11-28 03:54:35,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2024-11-28 03:54:35,220 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:54:35,220 INFO L218 NwaCegarLoop]: trace histogram [38, 38, 35, 35, 29, 29, 19, 19, 19, 19, 19, 19, 19, 17, 17, 17, 17, 17, 17, 17, 12, 10, 9, 6, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:54:35,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-28 03:54:35,421 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-28 03:54:35,421 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:54:35,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:54:35,422 INFO L85 PathProgramCache]: Analyzing trace with hash -744556606, now seen corresponding path program 7 times [2024-11-28 03:54:35,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:54:35,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943453645] [2024-11-28 03:54:35,422 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:54:35,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:54:35,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:54:36,437 INFO L134 CoverageAnalysis]: Checked inductivity of 7232 backedges. 191 proven. 1248 refuted. 0 times theorem prover too weak. 5793 trivial. 0 not checked. [2024-11-28 03:54:36,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:54:36,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943453645] [2024-11-28 03:54:36,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943453645] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:54:36,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198852080] [2024-11-28 03:54:36,438 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:54:36,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:54:36,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:54:36,440 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:54:36,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 03:54:36,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:54:36,757 INFO L256 TraceCheckSpWp]: Trace formula consists of 1130 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 03:54:36,796 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:54:36,917 INFO L134 CoverageAnalysis]: Checked inductivity of 7232 backedges. 191 proven. 1248 refuted. 0 times theorem prover too weak. 5793 trivial. 0 not checked. [2024-11-28 03:54:36,917 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:54:40,441 INFO L134 CoverageAnalysis]: Checked inductivity of 7232 backedges. 191 proven. 1281 refuted. 0 times theorem prover too weak. 5760 trivial. 0 not checked. [2024-11-28 03:54:40,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198852080] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:54:40,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:54:40,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 19] total 22 [2024-11-28 03:54:40,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920075887] [2024-11-28 03:54:40,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:54:40,443 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 03:54:40,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:54:40,443 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 03:54:40,444 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2024-11-28 03:54:40,444 INFO L87 Difference]: Start difference. First operand 199 states and 321 transitions. Second operand has 22 states, 20 states have (on average 3.75) internal successors, (75), 22 states have internal predecessors, (75), 19 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 9 states have call predecessors, (27), 19 states have call successors, (27) [2024-11-28 03:54:40,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:54:40,699 INFO L93 Difference]: Finished difference Result 228 states and 388 transitions. [2024-11-28 03:54:40,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 03:54:40,700 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 3.75) internal successors, (75), 22 states have internal predecessors, (75), 19 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 9 states have call predecessors, (27), 19 states have call successors, (27) Word has length 500 [2024-11-28 03:54:40,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:54:40,705 INFO L225 Difference]: With dead ends: 228 [2024-11-28 03:54:40,705 INFO L226 Difference]: Without dead ends: 222 [2024-11-28 03:54:40,706 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1024 GetRequests, 989 SyntacticMatches, 8 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2024-11-28 03:54:40,706 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 51 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:54:40,707 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 187 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 03:54:40,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2024-11-28 03:54:40,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 214. [2024-11-28 03:54:40,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 145 states have (on average 1.1724137931034482) internal successors, (170), 143 states have internal predecessors, (170), 44 states have call successors, (44), 24 states have call predecessors, (44), 24 states have return successors, (150), 46 states have call predecessors, (150), 44 states have call successors, (150) [2024-11-28 03:54:40,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 364 transitions. [2024-11-28 03:54:40,734 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 364 transitions. Word has length 500 [2024-11-28 03:54:40,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:54:40,735 INFO L471 AbstractCegarLoop]: Abstraction has 214 states and 364 transitions. [2024-11-28 03:54:40,736 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 3.75) internal successors, (75), 22 states have internal predecessors, (75), 19 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 9 states have call predecessors, (27), 19 states have call successors, (27) [2024-11-28 03:54:40,736 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 364 transitions. [2024-11-28 03:54:40,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 557 [2024-11-28 03:54:40,741 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:54:40,741 INFO L218 NwaCegarLoop]: trace histogram [44, 44, 37, 37, 33, 33, 22, 22, 22, 22, 22, 22, 22, 18, 18, 18, 18, 18, 18, 18, 15, 11, 11, 4, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:54:40,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-28 03:54:40,945 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-28 03:54:40,945 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:54:40,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:54:40,946 INFO L85 PathProgramCache]: Analyzing trace with hash 399277922, now seen corresponding path program 8 times [2024-11-28 03:54:40,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:54:40,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928845418] [2024-11-28 03:54:40,946 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:54:40,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:54:41,061 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:54:41,062 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:54:41,823 INFO L134 CoverageAnalysis]: Checked inductivity of 9040 backedges. 359 proven. 1056 refuted. 0 times theorem prover too weak. 7625 trivial. 0 not checked. [2024-11-28 03:54:41,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:54:41,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928845418] [2024-11-28 03:54:41,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928845418] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:54:41,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023564449] [2024-11-28 03:54:41,824 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:54:41,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:54:41,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:54:41,826 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:54:41,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 03:54:42,157 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:54:42,157 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:54:42,162 INFO L256 TraceCheckSpWp]: Trace formula consists of 1254 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-28 03:54:42,174 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:54:42,340 INFO L134 CoverageAnalysis]: Checked inductivity of 9040 backedges. 243 proven. 1553 refuted. 0 times theorem prover too weak. 7244 trivial. 0 not checked. [2024-11-28 03:54:42,340 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:54:46,715 INFO L134 CoverageAnalysis]: Checked inductivity of 9040 backedges. 243 proven. 1597 refuted. 0 times theorem prover too weak. 7200 trivial. 0 not checked. [2024-11-28 03:54:46,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023564449] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:54:46,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:54:46,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 21] total 28 [2024-11-28 03:54:46,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564763223] [2024-11-28 03:54:46,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:54:46,717 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 03:54:46,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:54:46,718 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 03:54:46,719 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2024-11-28 03:54:46,719 INFO L87 Difference]: Start difference. First operand 214 states and 364 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) [2024-11-28 03:54:47,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:54:47,153 INFO L93 Difference]: Finished difference Result 256 states and 481 transitions. [2024-11-28 03:54:47,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 03:54:47,154 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 556 [2024-11-28 03:54:47,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:54:47,159 INFO L225 Difference]: With dead ends: 256 [2024-11-28 03:54:47,159 INFO L226 Difference]: Without dead ends: 248 [2024-11-28 03:54:47,161 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1139 GetRequests, 1092 SyntacticMatches, 9 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=292, Invalid=1268, Unknown=0, NotChecked=0, Total=1560 [2024-11-28 03:54:47,162 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 41 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:54:47,162 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 241 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 03:54:47,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2024-11-28 03:54:47,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 220. [2024-11-28 03:54:47,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 149 states have (on average 1.167785234899329) internal successors, (174), 147 states have internal predecessors, (174), 44 states have call successors, (44), 24 states have call predecessors, (44), 26 states have return successors, (153), 48 states have call predecessors, (153), 44 states have call successors, (153) [2024-11-28 03:54:47,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 371 transitions. [2024-11-28 03:54:47,196 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 371 transitions. Word has length 556 [2024-11-28 03:54:47,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:54:47,197 INFO L471 AbstractCegarLoop]: Abstraction has 220 states and 371 transitions. [2024-11-28 03:54:47,198 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) [2024-11-28 03:54:47,198 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 371 transitions. [2024-11-28 03:54:47,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1566 [2024-11-28 03:54:47,242 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:54:47,243 INFO L218 NwaCegarLoop]: trace histogram [128, 128, 101, 101, 95, 92, 64, 64, 64, 64, 64, 64, 64, 50, 50, 50, 50, 50, 50, 50, 42, 36, 31, 6, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:54:47,256 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-28 03:54:47,447 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-28 03:54:47,448 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:54:47,449 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:54:47,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1274023156, now seen corresponding path program 9 times [2024-11-28 03:54:47,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:54:47,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277649985] [2024-11-28 03:54:47,449 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:54:47,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:54:47,501 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-28 03:54:47,502 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:54:47,584 INFO L134 CoverageAnalysis]: Checked inductivity of 74327 backedges. 2854 proven. 23 refuted. 0 times theorem prover too weak. 71450 trivial. 0 not checked. [2024-11-28 03:54:47,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:54:47,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277649985] [2024-11-28 03:54:47,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277649985] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:54:47,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126257300] [2024-11-28 03:54:47,584 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:54:47,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:54:47,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:54:47,587 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:54:47,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 03:54:47,935 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-28 03:54:47,935 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:54:47,938 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:54:47,958 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:54:48,066 INFO L134 CoverageAnalysis]: Checked inductivity of 74327 backedges. 5120 proven. 7 refuted. 0 times theorem prover too weak. 69200 trivial. 0 not checked. [2024-11-28 03:54:48,066 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:54:53,140 INFO L134 CoverageAnalysis]: Checked inductivity of 74327 backedges. 3310 proven. 33 refuted. 0 times theorem prover too weak. 70984 trivial. 0 not checked. [2024-11-28 03:54:53,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126257300] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:54:53,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:54:53,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 17 [2024-11-28 03:54:53,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707999254] [2024-11-28 03:54:53,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:54:53,143 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 03:54:53,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:54:53,144 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 03:54:53,144 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2024-11-28 03:54:53,144 INFO L87 Difference]: Start difference. First operand 220 states and 371 transitions. Second operand has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 8 states have call successors, (16), 2 states have call predecessors, (16), 8 states have return successors, (23), 6 states have call predecessors, (23), 8 states have call successors, (23) [2024-11-28 03:54:53,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:54:53,397 INFO L93 Difference]: Finished difference Result 435 states and 841 transitions. [2024-11-28 03:54:53,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 03:54:53,398 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 8 states have call successors, (16), 2 states have call predecessors, (16), 8 states have return successors, (23), 6 states have call predecessors, (23), 8 states have call successors, (23) Word has length 1565 [2024-11-28 03:54:53,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:54:53,401 INFO L225 Difference]: With dead ends: 435 [2024-11-28 03:54:53,401 INFO L226 Difference]: Without dead ends: 221 [2024-11-28 03:54:53,404 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3143 GetRequests, 3118 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2024-11-28 03:54:53,404 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 40 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:54:53,405 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 135 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:54:53,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2024-11-28 03:54:53,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 213. [2024-11-28 03:54:53,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 145 states have (on average 1.1586206896551725) internal successors, (168), 142 states have internal predecessors, (168), 42 states have call successors, (42), 24 states have call predecessors, (42), 25 states have return successors, (148), 46 states have call predecessors, (148), 42 states have call successors, (148) [2024-11-28 03:54:53,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 358 transitions. [2024-11-28 03:54:53,432 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 358 transitions. Word has length 1565 [2024-11-28 03:54:53,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:54:53,433 INFO L471 AbstractCegarLoop]: Abstraction has 213 states and 358 transitions. [2024-11-28 03:54:53,433 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 8 states have call successors, (16), 2 states have call predecessors, (16), 8 states have return successors, (23), 6 states have call predecessors, (23), 8 states have call successors, (23) [2024-11-28 03:54:53,433 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 358 transitions. [2024-11-28 03:54:53,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1372 [2024-11-28 03:54:53,449 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:54:53,449 INFO L218 NwaCegarLoop]: trace histogram [104, 104, 97, 97, 81, 80, 52, 52, 52, 52, 52, 52, 52, 48, 48, 48, 48, 48, 48, 48, 32, 29, 24, 16, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:54:53,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-28 03:54:53,650 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-28 03:54:53,650 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:54:53,650 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:54:53,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1191776500, now seen corresponding path program 10 times [2024-11-28 03:54:53,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:54:53,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828156531] [2024-11-28 03:54:53,651 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:54:53,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:54:53,926 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:54:53,926 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:54:55,691 INFO L134 CoverageAnalysis]: Checked inductivity of 56264 backedges. 817 proven. 3789 refuted. 0 times theorem prover too weak. 51658 trivial. 0 not checked. [2024-11-28 03:54:55,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:54:55,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828156531] [2024-11-28 03:54:55,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828156531] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:54:55,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390218417] [2024-11-28 03:54:55,692 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:54:55,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:54:55,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:54:55,694 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:54:55,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 03:54:56,210 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:54:56,210 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:54:56,216 INFO L256 TraceCheckSpWp]: Trace formula consists of 2437 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 03:54:56,231 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:54:56,336 INFO L134 CoverageAnalysis]: Checked inductivity of 56264 backedges. 8034 proven. 68 refuted. 0 times theorem prover too weak. 48162 trivial. 0 not checked. [2024-11-28 03:54:56,336 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:55:01,578 INFO L134 CoverageAnalysis]: Checked inductivity of 56264 backedges. 820 proven. 4160 refuted. 0 times theorem prover too weak. 51284 trivial. 0 not checked. [2024-11-28 03:55:01,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390218417] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:55:01,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:55:01,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 15] total 22 [2024-11-28 03:55:01,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737761711] [2024-11-28 03:55:01,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:55:01,580 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 03:55:01,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:55:01,581 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 03:55:01,581 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2024-11-28 03:55:01,581 INFO L87 Difference]: Start difference. First operand 213 states and 358 transitions. Second operand has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 22 states have internal predecessors, (87), 15 states have call successors, (25), 2 states have call predecessors, (25), 8 states have return successors, (29), 8 states have call predecessors, (29), 15 states have call successors, (29) [2024-11-28 03:55:01,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:55:01,971 INFO L93 Difference]: Finished difference Result 425 states and 825 transitions. [2024-11-28 03:55:01,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 03:55:01,972 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 22 states have internal predecessors, (87), 15 states have call successors, (25), 2 states have call predecessors, (25), 8 states have return successors, (29), 8 states have call predecessors, (29), 15 states have call successors, (29) Word has length 1371 [2024-11-28 03:55:01,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:55:01,975 INFO L225 Difference]: With dead ends: 425 [2024-11-28 03:55:01,975 INFO L226 Difference]: Without dead ends: 218 [2024-11-28 03:55:01,978 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2767 GetRequests, 2728 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=923, Unknown=0, NotChecked=0, Total=1122 [2024-11-28 03:55:01,979 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 37 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:55:01,980 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 306 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 03:55:01,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2024-11-28 03:55:02,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2024-11-28 03:55:02,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 150 states have (on average 1.1333333333333333) internal successors, (170), 145 states have internal predecessors, (170), 42 states have call successors, (42), 26 states have call predecessors, (42), 25 states have return successors, (138), 46 states have call predecessors, (138), 42 states have call successors, (138) [2024-11-28 03:55:02,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 350 transitions. [2024-11-28 03:55:02,008 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 350 transitions. Word has length 1371 [2024-11-28 03:55:02,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:55:02,008 INFO L471 AbstractCegarLoop]: Abstraction has 218 states and 350 transitions. [2024-11-28 03:55:02,009 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 22 states have internal predecessors, (87), 15 states have call successors, (25), 2 states have call predecessors, (25), 8 states have return successors, (29), 8 states have call predecessors, (29), 15 states have call successors, (29) [2024-11-28 03:55:02,009 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 350 transitions. [2024-11-28 03:55:02,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1415 [2024-11-28 03:55:02,062 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:55:02,062 INFO L218 NwaCegarLoop]: trace histogram [105, 105, 102, 102, 85, 83, 52, 52, 52, 52, 52, 52, 52, 51, 51, 51, 51, 51, 51, 51, 34, 31, 20, 19, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:55:02,076 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-28 03:55:02,262 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-28 03:55:02,263 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:55:02,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:55:02,264 INFO L85 PathProgramCache]: Analyzing trace with hash 499936055, now seen corresponding path program 11 times [2024-11-28 03:55:02,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:55:02,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955179239] [2024-11-28 03:55:02,264 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:55:02,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:55:02,320 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2024-11-28 03:55:02,320 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:55:02,701 INFO L134 CoverageAnalysis]: Checked inductivity of 59821 backedges. 1404 proven. 4050 refuted. 0 times theorem prover too weak. 54367 trivial. 0 not checked. [2024-11-28 03:55:02,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:55:02,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955179239] [2024-11-28 03:55:02,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955179239] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:55:02,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558802134] [2024-11-28 03:55:02,701 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:55:02,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:55:02,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:55:02,704 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:55:02,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 03:55:03,095 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2024-11-28 03:55:03,095 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:55:03,098 INFO L256 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 03:55:03,113 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:55:03,295 INFO L134 CoverageAnalysis]: Checked inductivity of 59821 backedges. 22144 proven. 176 refuted. 0 times theorem prover too weak. 37501 trivial. 0 not checked. [2024-11-28 03:55:03,295 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:55:09,590 INFO L134 CoverageAnalysis]: Checked inductivity of 59821 backedges. 1441 proven. 4381 refuted. 0 times theorem prover too weak. 53999 trivial. 0 not checked. [2024-11-28 03:55:09,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558802134] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:55:09,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:55:09,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 19] total 27 [2024-11-28 03:55:09,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975110284] [2024-11-28 03:55:09,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:55:09,593 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-28 03:55:09,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:55:09,593 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-28 03:55:09,594 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2024-11-28 03:55:09,594 INFO L87 Difference]: Start difference. First operand 218 states and 350 transitions. Second operand has 27 states, 27 states have (on average 3.814814814814815) internal successors, (103), 27 states have internal predecessors, (103), 20 states have call successors, (30), 2 states have call predecessors, (30), 10 states have return successors, (36), 10 states have call predecessors, (36), 20 states have call successors, (36) [2024-11-28 03:55:10,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:55:10,195 INFO L93 Difference]: Finished difference Result 444 states and 812 transitions. [2024-11-28 03:55:10,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 03:55:10,196 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.814814814814815) internal successors, (103), 27 states have internal predecessors, (103), 20 states have call successors, (30), 2 states have call predecessors, (30), 10 states have return successors, (36), 10 states have call predecessors, (36), 20 states have call successors, (36) Word has length 1414 [2024-11-28 03:55:10,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:55:10,200 INFO L225 Difference]: With dead ends: 444 [2024-11-28 03:55:10,200 INFO L226 Difference]: Without dead ends: 220 [2024-11-28 03:55:10,202 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2861 GetRequests, 2811 SyntacticMatches, 9 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=305, Invalid=1501, Unknown=0, NotChecked=0, Total=1806 [2024-11-28 03:55:10,203 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 58 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 03:55:10,203 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 454 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 03:55:10,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2024-11-28 03:55:10,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 214. [2024-11-28 03:55:10,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 148 states have (on average 1.1216216216216217) internal successors, (166), 144 states have internal predecessors, (166), 41 states have call successors, (41), 27 states have call predecessors, (41), 24 states have return successors, (123), 42 states have call predecessors, (123), 41 states have call successors, (123) [2024-11-28 03:55:10,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 330 transitions. [2024-11-28 03:55:10,232 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 330 transitions. Word has length 1414 [2024-11-28 03:55:10,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:55:10,233 INFO L471 AbstractCegarLoop]: Abstraction has 214 states and 330 transitions. [2024-11-28 03:55:10,233 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.814814814814815) internal successors, (103), 27 states have internal predecessors, (103), 20 states have call successors, (30), 2 states have call predecessors, (30), 10 states have return successors, (36), 10 states have call predecessors, (36), 20 states have call successors, (36) [2024-11-28 03:55:10,234 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 330 transitions. [2024-11-28 03:55:10,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2776 [2024-11-28 03:55:10,288 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:55:10,289 INFO L218 NwaCegarLoop]: trace histogram [205, 205, 202, 202, 167, 162, 102, 102, 102, 102, 102, 102, 102, 101, 101, 101, 101, 101, 101, 101, 66, 60, 40, 38, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:55:10,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-28 03:55:10,489 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:55:10,489 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:55:10,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:55:10,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1822339497, now seen corresponding path program 12 times [2024-11-28 03:55:10,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:55:10,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186185601] [2024-11-28 03:55:10,490 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:55:10,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:55:10,633 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2024-11-28 03:55:10,633 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:55:11,377 INFO L134 CoverageAnalysis]: Checked inductivity of 232550 backedges. 2178 proven. 9922 refuted. 0 times theorem prover too weak. 220450 trivial. 0 not checked. [2024-11-28 03:55:11,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:55:11,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186185601] [2024-11-28 03:55:11,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186185601] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:55:11,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886439649] [2024-11-28 03:55:11,377 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:55:11,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:55:11,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:55:11,379 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:55:11,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 03:55:11,994 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2024-11-28 03:55:11,995 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:55:11,999 INFO L256 TraceCheckSpWp]: Trace formula consists of 964 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-28 03:55:12,016 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:55:12,207 INFO L134 CoverageAnalysis]: Checked inductivity of 232550 backedges. 2178 proven. 9922 refuted. 0 times theorem prover too weak. 220450 trivial. 0 not checked. [2024-11-28 03:55:12,207 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:55:27,128 INFO L134 CoverageAnalysis]: Checked inductivity of 232550 backedges. 2182 proven. 9985 refuted. 0 times theorem prover too weak. 220383 trivial. 0 not checked. [2024-11-28 03:55:27,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886439649] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:55:27,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:55:27,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 25] total 28 [2024-11-28 03:55:27,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711845735] [2024-11-28 03:55:27,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:55:27,131 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 03:55:27,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:55:27,132 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 03:55:27,132 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2024-11-28 03:55:27,132 INFO L87 Difference]: Start difference. First operand 214 states and 330 transitions. Second operand has 28 states, 26 states have (on average 3.576923076923077) internal successors, (93), 28 states have internal predecessors, (93), 23 states have call successors, (29), 1 states have call predecessors, (29), 12 states have return successors, (37), 15 states have call predecessors, (37), 23 states have call successors, (37) [2024-11-28 03:55:27,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:55:27,583 INFO L93 Difference]: Finished difference Result 253 states and 459 transitions. [2024-11-28 03:55:27,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 03:55:27,584 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), 23 states have call successors, (29), 1 states have call predecessors, (29), 12 states have return successors, (37), 15 states have call predecessors, (37), 23 states have call successors, (37) Word has length 2775 [2024-11-28 03:55:27,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:55:27,594 INFO L225 Difference]: With dead ends: 253 [2024-11-28 03:55:27,594 INFO L226 Difference]: Without dead ends: 245 [2024-11-28 03:55:27,595 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5583 GetRequests, 5536 SyntacticMatches, 11 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=261, Invalid=1145, Unknown=0, NotChecked=0, Total=1406 [2024-11-28 03:55:27,596 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 112 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 03:55:27,596 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 251 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 03:55:27,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2024-11-28 03:55:27,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 216. [2024-11-28 03:55:27,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 149 states have (on average 1.1208053691275168) internal successors, (167), 145 states have internal predecessors, (167), 42 states have call successors, (42), 27 states have call predecessors, (42), 24 states have return successors, (130), 43 states have call predecessors, (130), 42 states have call successors, (130) [2024-11-28 03:55:27,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 339 transitions. [2024-11-28 03:55:27,627 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 339 transitions. Word has length 2775 [2024-11-28 03:55:27,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:55:27,630 INFO L471 AbstractCegarLoop]: Abstraction has 216 states and 339 transitions. [2024-11-28 03:55:27,630 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), 23 states have call successors, (29), 1 states have call predecessors, (29), 12 states have return successors, (37), 15 states have call predecessors, (37), 23 states have call successors, (37) [2024-11-28 03:55:27,631 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 339 transitions. [2024-11-28 03:55:27,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2436 [2024-11-28 03:55:27,675 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:55:27,675 INFO L218 NwaCegarLoop]: trace histogram [181, 181, 176, 176, 145, 144, 90, 90, 90, 90, 90, 90, 90, 88, 88, 88, 88, 88, 88, 88, 56, 55, 37, 31, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:55:27,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-28 03:55:27,876 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:55:27,876 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:55:27,877 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:55:27,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1457535864, now seen corresponding path program 13 times [2024-11-28 03:55:27,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:55:27,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494550401] [2024-11-28 03:55:27,878 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:55:27,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:55:28,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:55:37,449 INFO L134 CoverageAnalysis]: Checked inductivity of 178828 backedges. 3733 proven. 7818 refuted. 0 times theorem prover too weak. 167277 trivial. 0 not checked. [2024-11-28 03:55:37,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:55:37,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494550401] [2024-11-28 03:55:37,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494550401] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:55:37,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414628208] [2024-11-28 03:55:37,450 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:55:37,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:55:37,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:55:37,453 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:55:37,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-28 03:55:38,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:55:38,911 INFO L256 TraceCheckSpWp]: Trace formula consists of 5426 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-28 03:55:38,929 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:55:39,400 INFO L134 CoverageAnalysis]: Checked inductivity of 178828 backedges. 1489 proven. 10186 refuted. 0 times theorem prover too weak. 167153 trivial. 0 not checked. [2024-11-28 03:55:39,401 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:55:58,373 INFO L134 CoverageAnalysis]: Checked inductivity of 178828 backedges. 1489 proven. 10271 refuted. 0 times theorem prover too weak. 167068 trivial. 0 not checked. [2024-11-28 03:55:58,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414628208] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:55:58,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:55:58,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 27] total 44 [2024-11-28 03:55:58,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223850936] [2024-11-28 03:55:58,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:55:58,377 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-28 03:55:58,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:55:58,378 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-28 03:55:58,379 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1685, Unknown=0, NotChecked=0, Total=1892 [2024-11-28 03:55:58,379 INFO L87 Difference]: Start difference. First operand 216 states and 339 transitions. Second operand has 44 states, 42 states have (on average 3.3095238095238093) internal successors, (139), 44 states have internal predecessors, (139), 36 states have call successors, (44), 1 states have call predecessors, (44), 22 states have return successors, (61), 24 states have call predecessors, (61), 36 states have call successors, (61) [2024-11-28 03:56:01,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:56:01,687 INFO L93 Difference]: Finished difference Result 665 states and 1530 transitions. [2024-11-28 03:56:01,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2024-11-28 03:56:01,688 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 3.3095238095238093) internal successors, (139), 44 states have internal predecessors, (139), 36 states have call successors, (44), 1 states have call predecessors, (44), 22 states have return successors, (61), 24 states have call predecessors, (61), 36 states have call successors, (61) Word has length 2435 [2024-11-28 03:56:01,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:56:01,700 INFO L225 Difference]: With dead ends: 665 [2024-11-28 03:56:01,700 INFO L226 Difference]: Without dead ends: 412 [2024-11-28 03:56:01,709 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4951 GetRequests, 4839 SyntacticMatches, 12 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2960 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1404, Invalid=8898, Unknown=0, NotChecked=0, Total=10302 [2024-11-28 03:56:01,710 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 306 mSDsluCounter, 796 mSDsCounter, 0 mSdLazyCounter, 1654 mSolverCounterSat, 336 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 1990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 336 IncrementalHoareTripleChecker+Valid, 1654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-28 03:56:01,710 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 846 Invalid, 1990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [336 Valid, 1654 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-28 03:56:01,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2024-11-28 03:56:01,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 299. [2024-11-28 03:56:01,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 206 states have (on average 1.087378640776699) internal successors, (224), 202 states have internal predecessors, (224), 61 states have call successors, (61), 39 states have call predecessors, (61), 31 states have return successors, (260), 57 states have call predecessors, (260), 61 states have call successors, (260) [2024-11-28 03:56:01,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 545 transitions. [2024-11-28 03:56:01,767 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 545 transitions. Word has length 2435 [2024-11-28 03:56:01,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:56:01,768 INFO L471 AbstractCegarLoop]: Abstraction has 299 states and 545 transitions. [2024-11-28 03:56:01,769 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 3.3095238095238093) internal successors, (139), 44 states have internal predecessors, (139), 36 states have call successors, (44), 1 states have call predecessors, (44), 22 states have return successors, (61), 24 states have call predecessors, (61), 36 states have call successors, (61) [2024-11-28 03:56:01,769 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 545 transitions. [2024-11-28 03:56:01,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4724 [2024-11-28 03:56:01,952 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:56:01,954 INFO L218 NwaCegarLoop]: trace histogram [358, 358, 335, 335, 285, 276, 179, 179, 179, 179, 179, 179, 179, 167, 167, 167, 167, 167, 167, 167, 118, 97, 73, 59, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:56:01,977 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-28 03:56:02,154 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-28 03:56:02,155 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:56:02,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:56:02,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1557632618, now seen corresponding path program 14 times [2024-11-28 03:56:02,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:56:02,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298853555] [2024-11-28 03:56:02,157 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:56:02,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:56:04,723 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:56:04,723 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:56:30,750 INFO L134 CoverageAnalysis]: Checked inductivity of 676980 backedges. 7143 proven. 19545 refuted. 0 times theorem prover too weak. 650292 trivial. 0 not checked. [2024-11-28 03:56:30,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:56:30,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298853555] [2024-11-28 03:56:30,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298853555] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:56:30,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433606786] [2024-11-28 03:56:30,751 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:56:30,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:56:30,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:56:30,753 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:56:30,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-28 03:56:32,846 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:56:32,846 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:56:32,885 INFO L256 TraceCheckSpWp]: Trace formula consists of 10506 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-28 03:56:32,924 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:56:33,484 INFO L134 CoverageAnalysis]: Checked inductivity of 676980 backedges. 2877 proven. 22082 refuted. 0 times theorem prover too weak. 652021 trivial. 0 not checked. [2024-11-28 03:56:33,484 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:57:00,756 INFO L134 CoverageAnalysis]: Checked inductivity of 676980 backedges. 2877 proven. 22184 refuted. 0 times theorem prover too weak. 651919 trivial. 0 not checked. [2024-11-28 03:57:00,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433606786] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:57:00,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:57:00,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18, 29] total 47 [2024-11-28 03:57:00,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18250571] [2024-11-28 03:57:00,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:57:00,762 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-28 03:57:00,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:57:00,763 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-28 03:57:00,764 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1930, Unknown=0, NotChecked=0, Total=2162 [2024-11-28 03:57:00,764 INFO L87 Difference]: Start difference. First operand 299 states and 545 transitions. Second operand has 47 states, 45 states have (on average 3.311111111111111) internal successors, (149), 47 states have internal predecessors, (149), 39 states have call successors, (48), 1 states have call predecessors, (48), 24 states have return successors, (67), 27 states have call predecessors, (67), 39 states have call successors, (67) [2024-11-28 03:57:03,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:57:03,643 INFO L93 Difference]: Finished difference Result 870 states and 2045 transitions. [2024-11-28 03:57:03,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2024-11-28 03:57:03,645 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 3.311111111111111) internal successors, (149), 47 states have internal predecessors, (149), 39 states have call successors, (48), 1 states have call predecessors, (48), 24 states have return successors, (67), 27 states have call predecessors, (67), 39 states have call successors, (67) Word has length 4723 [2024-11-28 03:57:03,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:57:03,656 INFO L225 Difference]: With dead ends: 870 [2024-11-28 03:57:03,656 INFO L226 Difference]: Without dead ends: 554 [2024-11-28 03:57:03,664 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9535 GetRequests, 9415 SyntacticMatches, 13 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3402 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1521, Invalid=10251, Unknown=0, NotChecked=0, Total=11772 [2024-11-28 03:57:03,668 INFO L435 NwaCegarLoop]: 60 mSDtfsCounter, 286 mSDsluCounter, 984 mSDsCounter, 0 mSdLazyCounter, 2036 mSolverCounterSat, 313 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 1044 SdHoareTripleChecker+Invalid, 2349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 313 IncrementalHoareTripleChecker+Valid, 2036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-28 03:57:03,668 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 1044 Invalid, 2349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [313 Valid, 2036 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-28 03:57:03,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2024-11-28 03:57:03,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 468. [2024-11-28 03:57:03,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 330 states have (on average 1.0666666666666667) internal successors, (352), 322 states have internal predecessors, (352), 101 states have call successors, (101), 74 states have call predecessors, (101), 36 states have return successors, (435), 71 states have call predecessors, (435), 101 states have call successors, (435) [2024-11-28 03:57:03,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 888 transitions. [2024-11-28 03:57:03,743 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 888 transitions. Word has length 4723 [2024-11-28 03:57:03,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:57:03,744 INFO L471 AbstractCegarLoop]: Abstraction has 468 states and 888 transitions. [2024-11-28 03:57:03,744 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 3.311111111111111) internal successors, (149), 47 states have internal predecessors, (149), 39 states have call successors, (48), 1 states have call predecessors, (48), 24 states have return successors, (67), 27 states have call predecessors, (67), 39 states have call successors, (67) [2024-11-28 03:57:03,744 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 888 transitions. [2024-11-28 03:57:04,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8183 [2024-11-28 03:57:04,216 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:57:04,217 INFO L218 NwaCegarLoop]: trace histogram [602, 602, 599, 599, 490, 482, 301, 301, 301, 301, 301, 301, 301, 299, 299, 299, 299, 299, 299, 299, 191, 181, 117, 112, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:57:04,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-28 03:57:04,417 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:57:04,417 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:57:04,419 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:57:04,420 INFO L85 PathProgramCache]: Analyzing trace with hash 314072104, now seen corresponding path program 15 times [2024-11-28 03:57:04,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:57:04,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564119395] [2024-11-28 03:57:04,420 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:57:04,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:57:04,635 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2024-11-28 03:57:04,635 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:57:05,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2034538 backedges. 27681 proven. 686 refuted. 0 times theorem prover too weak. 2006171 trivial. 0 not checked. [2024-11-28 03:57:05,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:57:05,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564119395] [2024-11-28 03:57:05,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564119395] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:57:05,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067974108] [2024-11-28 03:57:05,248 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:57:05,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:57:05,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:57:05,250 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:57:05,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-28 03:57:06,551 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2024-11-28 03:57:06,551 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:57:06,562 INFO L256 TraceCheckSpWp]: Trace formula consists of 1103 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 03:57:06,603 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:57:06,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2034538 backedges. 127557 proven. 143 refuted. 0 times theorem prover too weak. 1906838 trivial. 0 not checked. [2024-11-28 03:57:06,816 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:57:39,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2034538 backedges. 29864 proven. 765 refuted. 0 times theorem prover too weak. 2003909 trivial. 0 not checked. [2024-11-28 03:57:39,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067974108] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:57:39,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:57:39,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 17] total 24 [2024-11-28 03:57:39,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115794229] [2024-11-28 03:57:39,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:57:39,403 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 03:57:39,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:57:39,404 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 03:57:39,404 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2024-11-28 03:57:39,404 INFO L87 Difference]: Start difference. First operand 468 states and 888 transitions. Second operand has 24 states, 24 states have (on average 4.041666666666667) internal successors, (97), 24 states have internal predecessors, (97), 14 states have call successors, (32), 2 states have call predecessors, (32), 9 states have return successors, (38), 17 states have call predecessors, (38), 14 states have call successors, (38) [2024-11-28 03:57:39,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:57:39,823 INFO L93 Difference]: Finished difference Result 1019 states and 2122 transitions. [2024-11-28 03:57:39,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 03:57:39,824 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.041666666666667) internal successors, (97), 24 states have internal predecessors, (97), 14 states have call successors, (32), 2 states have call predecessors, (32), 9 states have return successors, (38), 17 states have call predecessors, (38), 14 states have call successors, (38) Word has length 8182 [2024-11-28 03:57:39,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:57:39,840 INFO L225 Difference]: With dead ends: 1019 [2024-11-28 03:57:39,840 INFO L226 Difference]: Without dead ends: 562 [2024-11-28 03:57:39,845 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 16391 GetRequests, 16349 SyntacticMatches, 8 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=214, Invalid=1046, Unknown=0, NotChecked=0, Total=1260 [2024-11-28 03:57:39,846 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 42 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:57:39,846 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 280 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 03:57:39,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2024-11-28 03:57:39,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 472. [2024-11-28 03:57:39,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 334 states have (on average 1.0479041916167664) internal successors, (350), 324 states have internal predecessors, (350), 101 states have call successors, (101), 76 states have call predecessors, (101), 36 states have return successors, (431), 71 states have call predecessors, (431), 101 states have call successors, (431) [2024-11-28 03:57:39,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 882 transitions. [2024-11-28 03:57:39,913 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 882 transitions. Word has length 8182 [2024-11-28 03:57:39,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:57:39,918 INFO L471 AbstractCegarLoop]: Abstraction has 472 states and 882 transitions. [2024-11-28 03:57:39,918 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.041666666666667) internal successors, (97), 24 states have internal predecessors, (97), 14 states have call successors, (32), 2 states have call predecessors, (32), 9 states have return successors, (38), 17 states have call predecessors, (38), 14 states have call successors, (38) [2024-11-28 03:57:39,918 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 882 transitions. [2024-11-28 03:57:40,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6753 [2024-11-28 03:57:40,300 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:57:40,302 INFO L218 NwaCegarLoop]: trace histogram [501, 501, 490, 490, 406, 396, 250, 250, 250, 250, 250, 250, 250, 245, 245, 245, 245, 245, 245, 245, 156, 151, 105, 84, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:57:40,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-28 03:57:40,505 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:57:40,506 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:57:40,507 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:57:40,507 INFO L85 PathProgramCache]: Analyzing trace with hash -883389001, now seen corresponding path program 16 times [2024-11-28 03:57:40,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:57:40,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437959143] [2024-11-28 03:57:40,508 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:57:40,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:57:42,657 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:57:42,657 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:58:18,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1384705 backedges. 4116 proven. 36946 refuted. 0 times theorem prover too weak. 1343643 trivial. 0 not checked. [2024-11-28 03:58:18,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:58:18,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437959143] [2024-11-28 03:58:18,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437959143] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:58:18,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12904471] [2024-11-28 03:58:18,516 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:58:18,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:58:18,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:58:18,517 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:58:18,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-28 03:58:21,196 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:58:21,196 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:58:21,236 INFO L256 TraceCheckSpWp]: Trace formula consists of 12014 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-28 03:58:21,278 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:58:21,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1384705 backedges. 144649 proven. 919 refuted. 0 times theorem prover too weak. 1239137 trivial. 0 not checked. [2024-11-28 03:58:21,579 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:58:56,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1384705 backedges. 4211 proven. 41525 refuted. 0 times theorem prover too weak. 1338969 trivial. 0 not checked. [2024-11-28 03:58:56,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12904471] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:58:56,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:58:56,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 27] total 35 [2024-11-28 03:58:56,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964647492] [2024-11-28 03:58:56,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:58:56,475 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-28 03:58:56,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:58:56,476 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-28 03:58:56,477 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2024-11-28 03:58:56,477 INFO L87 Difference]: Start difference. First operand 472 states and 882 transitions. Second operand has 35 states, 35 states have (on average 3.6285714285714286) internal successors, (127), 35 states have internal predecessors, (127), 28 states have call successors, (39), 2 states have call predecessors, (39), 15 states have return successors, (49), 16 states have call predecessors, (49), 28 states have call successors, (49) [2024-11-28 03:58:57,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:58:57,873 INFO L93 Difference]: Finished difference Result 1010 states and 1963 transitions. [2024-11-28 03:58:57,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-28 03:58:57,874 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.6285714285714286) internal successors, (127), 35 states have internal predecessors, (127), 28 states have call successors, (39), 2 states have call predecessors, (39), 15 states have return successors, (49), 16 states have call predecessors, (49), 28 states have call successors, (49) Word has length 6752 [2024-11-28 03:58:57,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:58:57,887 INFO L225 Difference]: With dead ends: 1010 [2024-11-28 03:58:57,887 INFO L226 Difference]: Without dead ends: 545 [2024-11-28 03:58:57,894 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 13562 GetRequests, 13481 SyntacticMatches, 13 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=734, Invalid=4096, Unknown=0, NotChecked=0, Total=4830 [2024-11-28 03:58:57,895 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 152 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 03:58:57,895 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 528 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 03:58:57,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2024-11-28 03:58:57,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 467. [2024-11-28 03:58:57,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 331 states have (on average 1.0483383685800605) internal successors, (347), 321 states have internal predecessors, (347), 100 states have call successors, (100), 76 states have call predecessors, (100), 35 states have return successors, (410), 69 states have call predecessors, (410), 100 states have call successors, (410) [2024-11-28 03:58:57,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 857 transitions. [2024-11-28 03:58:57,982 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 857 transitions. Word has length 6752 [2024-11-28 03:58:57,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:58:57,984 INFO L471 AbstractCegarLoop]: Abstraction has 467 states and 857 transitions. [2024-11-28 03:58:57,984 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.6285714285714286) internal successors, (127), 35 states have internal predecessors, (127), 28 states have call successors, (39), 2 states have call predecessors, (39), 15 states have return successors, (49), 16 states have call predecessors, (49), 28 states have call successors, (49) [2024-11-28 03:58:57,984 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 857 transitions. [2024-11-28 03:58:58,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7816 [2024-11-28 03:58:58,473 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:58:58,475 INFO L218 NwaCegarLoop]: trace histogram [577, 577, 570, 570, 470, 459, 288, 288, 288, 288, 288, 288, 288, 285, 285, 285, 285, 285, 285, 285, 182, 174, 118, 100, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:58:58,617 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-28 03:58:58,676 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:58:58,677 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:58:58,680 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:58:58,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1704398635, now seen corresponding path program 17 times [2024-11-28 03:58:58,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:58:58,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776960443] [2024-11-28 03:58:58,682 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:58:58,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:58:58,934 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2024-11-28 03:58:58,934 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:58:59,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1855882 backedges. 9017 proven. 38273 refuted. 0 times theorem prover too weak. 1808592 trivial. 0 not checked. [2024-11-28 03:58:59,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:58:59,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776960443] [2024-11-28 03:58:59,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776960443] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:58:59,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177877941] [2024-11-28 03:58:59,784 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:58:59,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:58:59,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:58:59,786 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:58:59,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-28 03:59:01,304 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2024-11-28 03:59:01,304 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:59:01,315 INFO L256 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-28 03:59:01,367 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:59:01,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1855882 backedges. 484716 proven. 901 refuted. 0 times theorem prover too weak. 1370265 trivial. 0 not checked. [2024-11-28 03:59:01,764 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:59:41,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1855882 backedges. 9017 proven. 38299 refuted. 0 times theorem prover too weak. 1808566 trivial. 0 not checked. [2024-11-28 03:59:41,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177877941] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:59:41,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:59:41,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 25] total 29 [2024-11-28 03:59:41,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383623252] [2024-11-28 03:59:41,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:59:41,773 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 03:59:41,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:59:41,774 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 03:59:41,774 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2024-11-28 03:59:41,775 INFO L87 Difference]: Start difference. First operand 467 states and 857 transitions. Second operand has 29 states, 29 states have (on average 3.9655172413793105) internal successors, (115), 29 states have internal predecessors, (115), 24 states have call successors, (35), 2 states have call predecessors, (35), 13 states have return successors, (44), 14 states have call predecessors, (44), 24 states have call successors, (44) [2024-11-28 03:59:42,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:59:42,632 INFO L93 Difference]: Finished difference Result 980 states and 1902 transitions. [2024-11-28 03:59:42,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-28 03:59:42,633 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.9655172413793105) internal successors, (115), 29 states have internal predecessors, (115), 24 states have call successors, (35), 2 states have call predecessors, (35), 13 states have return successors, (44), 14 states have call predecessors, (44), 24 states have call successors, (44) Word has length 7815 [2024-11-28 03:59:42,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:59:42,643 INFO L225 Difference]: With dead ends: 980 [2024-11-28 03:59:42,643 INFO L226 Difference]: Without dead ends: 512 [2024-11-28 03:59:42,647 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 15674 GetRequests, 15614 SyntacticMatches, 12 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=393, Invalid=2057, Unknown=0, NotChecked=0, Total=2450 [2024-11-28 03:59:42,648 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 102 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 1019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 03:59:42,648 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 547 Invalid, 1019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 918 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 03:59:42,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2024-11-28 03:59:42,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 451. [2024-11-28 03:59:42,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 318 states have (on average 1.050314465408805) internal successors, (334), 311 states have internal predecessors, (334), 98 states have call successors, (98), 73 states have call predecessors, (98), 34 states have return successors, (391), 66 states have call predecessors, (391), 98 states have call successors, (391) [2024-11-28 03:59:42,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 823 transitions. [2024-11-28 03:59:42,718 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 823 transitions. Word has length 7815 [2024-11-28 03:59:42,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:59:42,719 INFO L471 AbstractCegarLoop]: Abstraction has 451 states and 823 transitions. [2024-11-28 03:59:42,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.9655172413793105) internal successors, (115), 29 states have internal predecessors, (115), 24 states have call successors, (35), 2 states have call predecessors, (35), 13 states have return successors, (44), 14 states have call predecessors, (44), 24 states have call successors, (44) [2024-11-28 03:59:42,720 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 823 transitions. [2024-11-28 03:59:44,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16244 [2024-11-28 03:59:44,169 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:59:44,171 INFO L218 NwaCegarLoop]: trace histogram [1212, 1212, 1173, 1173, 968, 961, 606, 606, 606, 606, 606, 606, 606, 586, 586, 586, 586, 586, 586, 586, 382, 355, 244, 212, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:59:44,237 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-28 03:59:44,371 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:59:44,371 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:59:44,374 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:59:44,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1369895298, now seen corresponding path program 18 times [2024-11-28 03:59:44,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:59:44,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90387252] [2024-11-28 03:59:44,376 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:59:44,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:59:45,062 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 98 check-sat command(s) [2024-11-28 03:59:45,062 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:59:49,977 INFO L134 CoverageAnalysis]: Checked inductivity of 8033164 backedges. 14869 proven. 102741 refuted. 0 times theorem prover too weak. 7915554 trivial. 0 not checked. [2024-11-28 03:59:49,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:59:49,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90387252] [2024-11-28 03:59:49,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90387252] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:59:49,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587018627] [2024-11-28 03:59:49,978 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:59:49,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:59:49,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:59:49,979 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:59:49,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-28 03:59:53,482 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 98 check-sat command(s) [2024-11-28 03:59:53,483 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:59:53,504 INFO L256 TraceCheckSpWp]: Trace formula consists of 3373 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-28 03:59:53,670 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:59:54,695 INFO L134 CoverageAnalysis]: Checked inductivity of 8033164 backedges. 1634572 proven. 2751 refuted. 0 times theorem prover too weak. 6395841 trivial. 0 not checked. [2024-11-28 03:59:54,696 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:01:15,483 INFO L134 CoverageAnalysis]: Checked inductivity of 8033164 backedges. 15250 proven. 106955 refuted. 0 times theorem prover too weak. 7910959 trivial. 0 not checked. [2024-11-28 04:01:15,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587018627] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:01:15,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:01:15,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 22, 33] total 45 [2024-11-28 04:01:15,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073422671] [2024-11-28 04:01:15,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:01:15,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-28 04:01:15,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:01:15,496 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-28 04:01:15,496 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1761, Unknown=0, NotChecked=0, Total=1980 [2024-11-28 04:01:15,497 INFO L87 Difference]: Start difference. First operand 451 states and 823 transitions. Second operand has 45 states, 44 states have (on average 3.5) internal successors, (154), 45 states have internal predecessors, (154), 36 states have call successors, (48), 2 states have call predecessors, (48), 18 states have return successors, (62), 21 states have call predecessors, (62), 36 states have call successors, (62) [2024-11-28 04:01:17,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:01:17,413 INFO L93 Difference]: Finished difference Result 969 states and 1817 transitions. [2024-11-28 04:01:17,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-28 04:01:17,413 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 3.5) internal successors, (154), 45 states have internal predecessors, (154), 36 states have call successors, (48), 2 states have call predecessors, (48), 18 states have return successors, (62), 21 states have call predecessors, (62), 36 states have call successors, (62) Word has length 16243 [2024-11-28 04:01:17,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:01:17,422 INFO L225 Difference]: With dead ends: 969 [2024-11-28 04:01:17,422 INFO L226 Difference]: Without dead ends: 515 [2024-11-28 04:01:17,425 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 32558 GetRequests, 32460 SyntacticMatches, 17 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2016 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=940, Invalid=5866, Unknown=0, NotChecked=0, Total=6806 [2024-11-28 04:01:17,426 INFO L435 NwaCegarLoop]: 59 mSDtfsCounter, 161 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 1909 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 994 SdHoareTripleChecker+Invalid, 2087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 1909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:01:17,426 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 994 Invalid, 2087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 1909 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-28 04:01:17,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2024-11-28 04:01:17,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 458. [2024-11-28 04:01:17,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 323 states have (on average 1.0495356037151702) internal successors, (339), 316 states have internal predecessors, (339), 99 states have call successors, (99), 74 states have call predecessors, (99), 35 states have return successors, (401), 67 states have call predecessors, (401), 99 states have call successors, (401) [2024-11-28 04:01:17,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 839 transitions. [2024-11-28 04:01:17,508 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 839 transitions. Word has length 16243 [2024-11-28 04:01:17,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:01:17,510 INFO L471 AbstractCegarLoop]: Abstraction has 458 states and 839 transitions. [2024-11-28 04:01:17,511 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 3.5) internal successors, (154), 45 states have internal predecessors, (154), 36 states have call successors, (48), 2 states have call predecessors, (48), 18 states have return successors, (62), 21 states have call predecessors, (62), 36 states have call successors, (62) [2024-11-28 04:01:17,511 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 839 transitions. [2024-11-28 04:01:17,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8050 [2024-11-28 04:01:17,990 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:01:17,993 INFO L218 NwaCegarLoop]: trace histogram [598, 598, 583, 583, 490, 469, 299, 299, 299, 299, 299, 299, 299, 291, 291, 291, 291, 291, 291, 291, 199, 170, 114, 108, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:01:18,014 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-28 04:01:18,193 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-28 04:01:18,196 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:01:18,197 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:01:18,198 INFO L85 PathProgramCache]: Analyzing trace with hash 238923200, now seen corresponding path program 19 times [2024-11-28 04:01:18,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:01:18,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087945684] [2024-11-28 04:01:18,199 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:01:18,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:01:22,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:02:08,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1969159 backedges. 8032 proven. 34353 refuted. 0 times theorem prover too weak. 1926774 trivial. 0 not checked. [2024-11-28 04:02:08,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:02:08,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087945684] [2024-11-28 04:02:08,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087945684] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:02:08,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220469916] [2024-11-28 04:02:08,258 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:02:08,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:02:08,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:02:08,260 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:02:08,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-28 04:02:11,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:02:11,821 INFO L256 TraceCheckSpWp]: Trace formula consists of 17890 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-28 04:02:11,878 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:02:12,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1969159 backedges. 5398 proven. 44234 refuted. 0 times theorem prover too weak. 1919527 trivial. 0 not checked. [2024-11-28 04:02:12,408 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:02:58,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1969159 backedges. 5398 proven. 44374 refuted. 0 times theorem prover too weak. 1919387 trivial. 0 not checked. [2024-11-28 04:02:58,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220469916] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:02:58,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:02:58,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20, 33] total 46 [2024-11-28 04:02:58,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424193290] [2024-11-28 04:02:58,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:02:58,043 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-28 04:02:58,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:02:58,044 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-28 04:02:58,044 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=1842, Unknown=0, NotChecked=0, Total=2070 [2024-11-28 04:02:58,045 INFO L87 Difference]: Start difference. First operand 458 states and 839 transitions. Second operand has 46 states, 44 states have (on average 3.3181818181818183) internal successors, (146), 46 states have internal predecessors, (146), 41 states have call successors, (47), 1 states have call predecessors, (47), 21 states have return successors, (64), 22 states have call predecessors, (64), 41 states have call successors, (64) [2024-11-28 04:03:00,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:03:00,456 INFO L93 Difference]: Finished difference Result 994 states and 2246 transitions. [2024-11-28 04:03:00,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2024-11-28 04:03:00,457 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 44 states have (on average 3.3181818181818183) internal successors, (146), 46 states have internal predecessors, (146), 41 states have call successors, (47), 1 states have call predecessors, (47), 21 states have return successors, (64), 22 states have call predecessors, (64), 41 states have call successors, (64) Word has length 8049 [2024-11-28 04:03:00,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:03:00,466 INFO L225 Difference]: With dead ends: 994 [2024-11-28 04:03:00,467 INFO L226 Difference]: Without dead ends: 539 [2024-11-28 04:03:00,475 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 16179 GetRequests, 16056 SyntacticMatches, 15 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3131 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1791, Invalid=10199, Unknown=0, NotChecked=0, Total=11990 [2024-11-28 04:03:00,475 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 272 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 1476 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 860 SdHoareTripleChecker+Invalid, 1743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 1476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-28 04:03:00,476 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 860 Invalid, 1743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 1476 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-28 04:03:00,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2024-11-28 04:03:00,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 484. [2024-11-28 04:03:00,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 346 states have (on average 1.0520231213872833) internal successors, (364), 338 states have internal predecessors, (364), 105 states have call successors, (105), 85 states have call predecessors, (105), 32 states have return successors, (422), 60 states have call predecessors, (422), 105 states have call successors, (422) [2024-11-28 04:03:00,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 891 transitions. [2024-11-28 04:03:00,560 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 891 transitions. Word has length 8049 [2024-11-28 04:03:00,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:03:00,560 INFO L471 AbstractCegarLoop]: Abstraction has 484 states and 891 transitions. [2024-11-28 04:03:00,561 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 44 states have (on average 3.3181818181818183) internal successors, (146), 46 states have internal predecessors, (146), 41 states have call successors, (47), 1 states have call predecessors, (47), 21 states have return successors, (64), 22 states have call predecessors, (64), 41 states have call successors, (64) [2024-11-28 04:03:00,561 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 891 transitions. [2024-11-28 04:03:02,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18750 [2024-11-28 04:03:02,625 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:03:02,627 INFO L218 NwaCegarLoop]: trace histogram [1380, 1380, 1373, 1373, 1118, 1109, 690, 690, 690, 690, 690, 690, 690, 686, 686, 686, 686, 686, 686, 686, 432, 419, 264, 262, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:03:02,657 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-28 04:03:02,827 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2797720b-d97d-4c59-af40-2a1c581cba60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-28 04:03:02,828 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:03:02,830 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:03:02,831 INFO L85 PathProgramCache]: Analyzing trace with hash 959607546, now seen corresponding path program 20 times [2024-11-28 04:03:02,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:03:02,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446444076] [2024-11-28 04:03:02,832 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:03:02,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:03:29,329 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:03:29,329 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat