./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.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_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/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_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/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_c4d23cc5-04a4-4509-a711-17f5cfea189a/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 30672bd579b7f25ffa685cb80d8a419cb542781c19afe0226ba5d9d3cf26984c --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 04:53:35,908 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 04:53:36,006 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 04:53:36,013 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 04:53:36,014 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 04:53:36,057 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 04:53:36,058 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 04:53:36,059 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 04:53:36,060 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 04:53:36,060 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 04:53:36,061 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 04:53:36,061 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 04:53:36,062 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 04:53:36,062 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 04:53:36,062 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 04:53:36,062 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 04:53:36,063 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 04:53:36,063 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 04:53:36,063 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 04:53:36,063 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 04:53:36,063 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 04:53:36,064 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 04:53:36,064 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 04:53:36,064 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 04:53:36,064 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 04:53:36,064 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 04:53:36,064 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 04:53:36,064 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 04:53:36,065 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 04:53:36,065 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:53:36,065 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:53:36,065 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:53:36,066 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:53:36,066 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 04:53:36,066 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:53:36,067 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:53:36,067 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:53:36,067 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:53:36,067 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 04:53:36,067 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 04:53:36,067 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 04:53:36,067 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 04:53:36,068 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 04:53:36,068 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 04:53:36,068 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 04:53:36,068 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 04:53:36,068 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 04:53:36,068 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 04:53:36,068 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_c4d23cc5-04a4-4509-a711-17f5cfea189a/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 -> 30672bd579b7f25ffa685cb80d8a419cb542781c19afe0226ba5d9d3cf26984c [2024-11-28 04:53:36,431 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 04:53:36,443 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 04:53:36,446 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 04:53:36,448 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 04:53:36,448 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 04:53:36,449 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c [2024-11-28 04:53:39,664 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/data/f3a3615f4/1e70deaccf1849ca8ba2b706c1e299a1/FLAG40b83075b [2024-11-28 04:53:39,955 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 04:53:39,955 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c [2024-11-28 04:53:39,964 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/data/f3a3615f4/1e70deaccf1849ca8ba2b706c1e299a1/FLAG40b83075b [2024-11-28 04:53:39,980 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/data/f3a3615f4/1e70deaccf1849ca8ba2b706c1e299a1 [2024-11-28 04:53:39,983 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 04:53:39,985 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 04:53:39,986 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 04:53:39,986 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 04:53:39,991 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 04:53:39,992 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:53:39" (1/1) ... [2024-11-28 04:53:39,993 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@542e0a0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:53:39, skipping insertion in model container [2024-11-28 04:53:39,993 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:53:39" (1/1) ... [2024-11-28 04:53:40,011 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 04:53:40,190 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_c4d23cc5-04a4-4509-a711-17f5cfea189a/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c[490,503] [2024-11-28 04:53:40,227 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:53:40,239 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 04:53:40,253 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_c4d23cc5-04a4-4509-a711-17f5cfea189a/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c[490,503] [2024-11-28 04:53:40,274 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:53:40,291 INFO L204 MainTranslator]: Completed translation [2024-11-28 04:53:40,293 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:53:40 WrapperNode [2024-11-28 04:53:40,293 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 04:53:40,295 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 04:53:40,295 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 04:53:40,295 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 04:53:40,308 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:53:40" (1/1) ... [2024-11-28 04:53:40,319 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:53:40" (1/1) ... [2024-11-28 04:53:40,351 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 84 [2024-11-28 04:53:40,351 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 04:53:40,352 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 04:53:40,352 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 04:53:40,352 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 04:53:40,365 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:53:40" (1/1) ... [2024-11-28 04:53:40,365 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:53:40" (1/1) ... [2024-11-28 04:53:40,368 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:53:40" (1/1) ... [2024-11-28 04:53:40,387 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 04:53:40,387 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:53:40" (1/1) ... [2024-11-28 04:53:40,391 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:53:40" (1/1) ... [2024-11-28 04:53:40,395 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:53:40" (1/1) ... [2024-11-28 04:53:40,400 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:53:40" (1/1) ... [2024-11-28 04:53:40,406 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:53:40" (1/1) ... [2024-11-28 04:53:40,407 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:53:40" (1/1) ... [2024-11-28 04:53:40,408 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:53:40" (1/1) ... [2024-11-28 04:53:40,414 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 04:53:40,415 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 04:53:40,415 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 04:53:40,415 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 04:53:40,416 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:53:40" (1/1) ... [2024-11-28 04:53:40,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:53:40,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:53:40,466 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 04:53:40,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 04:53:40,505 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 04:53:40,505 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-28 04:53:40,505 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-28 04:53:40,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 04:53:40,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 04:53:40,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 04:53:40,506 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-28 04:53:40,506 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-28 04:53:40,578 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 04:53:40,580 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 04:53:40,765 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-11-28 04:53:40,766 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 04:53:40,776 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 04:53:40,776 INFO L312 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-28 04:53:40,777 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:53:40 BoogieIcfgContainer [2024-11-28 04:53:40,777 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 04:53:40,780 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 04:53:40,780 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 04:53:40,786 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 04:53:40,786 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:53:39" (1/3) ... [2024-11-28 04:53:40,787 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fd816ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:53:40, skipping insertion in model container [2024-11-28 04:53:40,787 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:53:40" (2/3) ... [2024-11-28 04:53:40,787 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fd816ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:53:40, skipping insertion in model container [2024-11-28 04:53:40,788 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:53:40" (3/3) ... [2024-11-28 04:53:40,789 INFO L128 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound100.c [2024-11-28 04:53:40,807 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 04:53:40,809 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG egcd2-ll_unwindbound100.c that has 3 procedures, 34 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-28 04:53:40,865 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 04:53:40,878 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;@49038512, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 04:53:40,878 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-28 04:53:40,882 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-28 04:53:40,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-28 04:53:40,890 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:53:40,891 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:53:40,892 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:53:40,897 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:53:40,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1022199732, now seen corresponding path program 1 times [2024-11-28 04:53:40,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:53:40,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244543335] [2024-11-28 04:53:40,907 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:53:40,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:53:41,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:53:41,088 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 04:53:41,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:53:41,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244543335] [2024-11-28 04:53:41,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244543335] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:53:41,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78129470] [2024-11-28 04:53:41,090 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:53:41,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:53:41,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:53:41,094 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:53:41,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 04:53:41,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:53:41,183 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-28 04:53:41,187 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:53:41,200 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 04:53:41,200 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:53:41,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78129470] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:53:41,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:53:41,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2024-11-28 04:53:41,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277654623] [2024-11-28 04:53:41,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:53:41,208 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-28 04:53:41,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:53:41,229 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-28 04:53:41,229 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 04:53:41,232 INFO L87 Difference]: Start difference. First operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 04:53:41,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:53:41,255 INFO L93 Difference]: Finished difference Result 65 states and 104 transitions. [2024-11-28 04:53:41,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-28 04:53:41,257 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2024-11-28 04:53:41,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:53:41,264 INFO L225 Difference]: With dead ends: 65 [2024-11-28 04:53:41,264 INFO L226 Difference]: Without dead ends: 30 [2024-11-28 04:53:41,268 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 04:53:41,271 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:53:41,272 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:53:41,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-28 04:53:41,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-11-28 04:53:41,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 19 states have internal predecessors, (22), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-28 04:53:41,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2024-11-28 04:53:41,310 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 28 [2024-11-28 04:53:41,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:53:41,311 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2024-11-28 04:53:41,311 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 04:53:41,312 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2024-11-28 04:53:41,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-28 04:53:41,313 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:53:41,313 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:53:41,324 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 04:53:41,518 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-11-28 04:53:41,518 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:53:41,519 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:53:41,519 INFO L85 PathProgramCache]: Analyzing trace with hash -482926610, now seen corresponding path program 1 times [2024-11-28 04:53:41,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:53:41,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350041532] [2024-11-28 04:53:41,520 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:53:41,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:53:41,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:53:41,752 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-28 04:53:41,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:53:41,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350041532] [2024-11-28 04:53:41,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350041532] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:53:41,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:53:41,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 04:53:41,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592255223] [2024-11-28 04:53:41,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:53:41,755 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:53:41,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:53:41,758 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:53:41,758 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:53:41,758 INFO L87 Difference]: Start difference. First operand 30 states and 41 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 04:53:41,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:53:41,803 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2024-11-28 04:53:41,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:53:41,804 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2024-11-28 04:53:41,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:53:41,805 INFO L225 Difference]: With dead ends: 40 [2024-11-28 04:53:41,806 INFO L226 Difference]: Without dead ends: 32 [2024-11-28 04:53:41,807 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:53:41,807 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 7 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 100 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 04:53:41,809 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 100 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:53:41,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-28 04:53:41,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-11-28 04:53:41,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-28 04:53:41,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2024-11-28 04:53:41,822 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 29 [2024-11-28 04:53:41,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:53:41,825 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2024-11-28 04:53:41,825 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 04:53:41,826 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2024-11-28 04:53:41,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-28 04:53:41,828 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:53:41,828 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:53:41,828 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 04:53:41,829 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:53:41,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:53:41,829 INFO L85 PathProgramCache]: Analyzing trace with hash 2088040982, now seen corresponding path program 1 times [2024-11-28 04:53:41,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:53:41,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281612504] [2024-11-28 04:53:41,830 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:53:41,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:53:41,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:53:42,160 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 04:53:42,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:53:42,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281612504] [2024-11-28 04:53:42,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281612504] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:53:42,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048628922] [2024-11-28 04:53:42,162 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:53:42,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:53:42,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:53:42,168 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:53:42,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 04:53:42,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:53:42,260 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-28 04:53:42,263 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:53:42,490 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-28 04:53:42,491 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:53:42,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048628922] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:53:42,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:53:42,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2024-11-28 04:53:42,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919817177] [2024-11-28 04:53:42,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:53:42,494 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 04:53:42,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:53:42,495 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 04:53:42,495 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-11-28 04:53:42,495 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 04:53:42,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:53:42,653 INFO L93 Difference]: Finished difference Result 49 states and 67 transitions. [2024-11-28 04:53:42,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 04:53:42,654 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2024-11-28 04:53:42,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:53:42,655 INFO L225 Difference]: With dead ends: 49 [2024-11-28 04:53:42,655 INFO L226 Difference]: Without dead ends: 47 [2024-11-28 04:53:42,656 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-11-28 04:53:42,656 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 9 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:53:42,656 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 146 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:53:42,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-28 04:53:42,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2024-11-28 04:53:42,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 28 states have internal predecessors, (34), 15 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-28 04:53:42,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 63 transitions. [2024-11-28 04:53:42,676 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 63 transitions. Word has length 30 [2024-11-28 04:53:42,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:53:42,677 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 63 transitions. [2024-11-28 04:53:42,677 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 04:53:42,677 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 63 transitions. [2024-11-28 04:53:42,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-28 04:53:42,678 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:53:42,678 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:53:42,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-28 04:53:42,882 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:53:42,882 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:53:42,885 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:53:42,885 INFO L85 PathProgramCache]: Analyzing trace with hash 769472419, now seen corresponding path program 1 times [2024-11-28 04:53:42,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:53:42,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401976523] [2024-11-28 04:53:42,885 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:53:42,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:53:42,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 04:53:42,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1832311000] [2024-11-28 04:53:42,919 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:53:42,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:53:42,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:53:42,921 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:53:42,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 04:53:42,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:53:42,994 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 04:53:42,996 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:53:43,070 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-28 04:53:43,070 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:53:43,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:53:43,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401976523] [2024-11-28 04:53:43,071 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:53:43,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832311000] [2024-11-28 04:53:43,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832311000] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:53:43,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:53:43,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 04:53:43,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573164337] [2024-11-28 04:53:43,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:53:43,072 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:53:43,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:53:43,074 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:53:43,075 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:53:43,075 INFO L87 Difference]: Start difference. First operand 45 states and 63 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 04:53:43,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:53:43,150 INFO L93 Difference]: Finished difference Result 66 states and 95 transitions. [2024-11-28 04:53:43,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:53:43,150 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 32 [2024-11-28 04:53:43,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:53:43,153 INFO L225 Difference]: With dead ends: 66 [2024-11-28 04:53:43,153 INFO L226 Difference]: Without dead ends: 64 [2024-11-28 04:53:43,153 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:53:43,157 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:53:43,158 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 139 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:53:43,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-28 04:53:43,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 55. [2024-11-28 04:53:43,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 33 states have (on average 1.303030303030303) internal successors, (43), 37 states have internal predecessors, (43), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2024-11-28 04:53:43,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 76 transitions. [2024-11-28 04:53:43,179 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 76 transitions. Word has length 32 [2024-11-28 04:53:43,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:53:43,180 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 76 transitions. [2024-11-28 04:53:43,180 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 04:53:43,180 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 76 transitions. [2024-11-28 04:53:43,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-28 04:53:43,183 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:53:43,184 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:53:43,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 04:53:43,388 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:53:43,388 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:53:43,389 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:53:43,389 INFO L85 PathProgramCache]: Analyzing trace with hash 55994570, now seen corresponding path program 1 times [2024-11-28 04:53:43,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:53:43,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933918529] [2024-11-28 04:53:43,389 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:53:43,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:53:43,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:53:43,633 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 04:53:43,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:53:43,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933918529] [2024-11-28 04:53:43,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933918529] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:53:43,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528556695] [2024-11-28 04:53:43,634 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:53:43,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:53:43,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:53:43,637 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:53:43,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 04:53:43,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:53:43,701 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 04:53:43,703 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:53:43,835 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-28 04:53:43,835 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:53:43,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528556695] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:53:43,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:53:43,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-11-28 04:53:43,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387075309] [2024-11-28 04:53:43,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:53:43,836 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:53:43,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:53:43,836 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:53:43,837 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-11-28 04:53:43,837 INFO L87 Difference]: Start difference. First operand 55 states and 76 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-28 04:53:43,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:53:43,928 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2024-11-28 04:53:43,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:53:43,930 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 35 [2024-11-28 04:53:43,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:53:43,931 INFO L225 Difference]: With dead ends: 63 [2024-11-28 04:53:43,932 INFO L226 Difference]: Without dead ends: 59 [2024-11-28 04:53:43,932 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-28 04:53:43,933 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 9 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:53:43,933 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 142 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:53:43,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-28 04:53:43,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2024-11-28 04:53:43,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.25) internal successors, (45), 39 states have internal predecessors, (45), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-28 04:53:43,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2024-11-28 04:53:43,954 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 76 transitions. Word has length 35 [2024-11-28 04:53:43,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:53:43,955 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 76 transitions. [2024-11-28 04:53:43,955 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-28 04:53:43,955 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 76 transitions. [2024-11-28 04:53:43,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-28 04:53:43,956 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:53:43,958 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:53:43,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-28 04:53:44,159 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:53:44,159 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:53:44,159 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:53:44,160 INFO L85 PathProgramCache]: Analyzing trace with hash 290957379, now seen corresponding path program 1 times [2024-11-28 04:53:44,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:53:44,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494699378] [2024-11-28 04:53:44,160 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:53:44,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:53:44,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:53:44,287 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-28 04:53:44,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:53:44,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494699378] [2024-11-28 04:53:44,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494699378] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:53:44,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:53:44,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 04:53:44,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891651295] [2024-11-28 04:53:44,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:53:44,288 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:53:44,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:53:44,289 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:53:44,289 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:53:44,289 INFO L87 Difference]: Start difference. First operand 58 states and 76 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 04:53:44,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:53:44,333 INFO L93 Difference]: Finished difference Result 84 states and 111 transitions. [2024-11-28 04:53:44,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:53:44,334 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35 [2024-11-28 04:53:44,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:53:44,335 INFO L225 Difference]: With dead ends: 84 [2024-11-28 04:53:44,335 INFO L226 Difference]: Without dead ends: 58 [2024-11-28 04:53:44,336 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:53:44,337 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 10 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:53:44,337 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 100 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:53:44,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-28 04:53:44,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2024-11-28 04:53:44,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 39 states have internal predecessors, (44), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-28 04:53:44,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 75 transitions. [2024-11-28 04:53:44,361 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 75 transitions. Word has length 35 [2024-11-28 04:53:44,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:53:44,363 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 75 transitions. [2024-11-28 04:53:44,363 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 04:53:44,364 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 75 transitions. [2024-11-28 04:53:44,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-28 04:53:44,365 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:53:44,365 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:53:44,367 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-28 04:53:44,367 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:53:44,368 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:53:44,368 INFO L85 PathProgramCache]: Analyzing trace with hash -536481827, now seen corresponding path program 1 times [2024-11-28 04:53:44,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:53:44,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518505491] [2024-11-28 04:53:44,368 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:53:44,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:53:44,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 04:53:44,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1908955041] [2024-11-28 04:53:44,395 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:53:44,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:53:44,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:53:44,398 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:53:44,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 04:53:44,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:53:44,473 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-28 04:53:44,476 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:53:44,726 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-28 04:53:44,726 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:53:44,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:53:44,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518505491] [2024-11-28 04:53:44,727 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:53:44,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908955041] [2024-11-28 04:53:44,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908955041] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:53:44,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:53:44,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 04:53:44,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820368469] [2024-11-28 04:53:44,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:53:44,728 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:53:44,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:53:44,729 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:53:44,729 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:53:44,729 INFO L87 Difference]: Start difference. First operand 58 states and 75 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-28 04:53:44,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:53:44,813 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2024-11-28 04:53:44,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:53:44,814 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2024-11-28 04:53:44,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:53:44,815 INFO L225 Difference]: With dead ends: 65 [2024-11-28 04:53:44,815 INFO L226 Difference]: Without dead ends: 63 [2024-11-28 04:53:44,815 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:53:44,816 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:53:44,817 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 130 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:53:44,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-28 04:53:44,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2024-11-28 04:53:44,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 39 states have (on average 1.205128205128205) internal successors, (47), 42 states have internal predecessors, (47), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-28 04:53:44,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 78 transitions. [2024-11-28 04:53:44,838 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 78 transitions. Word has length 47 [2024-11-28 04:53:44,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:53:44,842 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 78 transitions. [2024-11-28 04:53:44,842 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-28 04:53:44,842 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 78 transitions. [2024-11-28 04:53:44,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-28 04:53:44,844 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:53:44,844 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:53:44,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-28 04:53:45,044 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:53:45,045 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:53:45,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:53:45,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1556422495, now seen corresponding path program 1 times [2024-11-28 04:53:45,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:53:45,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483753097] [2024-11-28 04:53:45,046 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:53:45,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:53:45,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 04:53:45,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1307570347] [2024-11-28 04:53:45,072 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:53:45,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:53:45,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:53:45,075 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:53:45,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 04:53:45,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:53:45,153 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 04:53:45,155 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:53:45,262 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-28 04:53:45,263 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:53:45,407 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-28 04:53:45,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:53:45,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483753097] [2024-11-28 04:53:45,407 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:53:45,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307570347] [2024-11-28 04:53:45,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307570347] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 04:53:45,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:53:45,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-11-28 04:53:45,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571030666] [2024-11-28 04:53:45,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:53:45,408 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:53:45,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:53:45,408 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:53:45,408 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-28 04:53:45,409 INFO L87 Difference]: Start difference. First operand 62 states and 78 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-28 04:53:45,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:53:45,513 INFO L93 Difference]: Finished difference Result 68 states and 83 transitions. [2024-11-28 04:53:45,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:53:45,516 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 55 [2024-11-28 04:53:45,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:53:45,517 INFO L225 Difference]: With dead ends: 68 [2024-11-28 04:53:45,517 INFO L226 Difference]: Without dead ends: 66 [2024-11-28 04:53:45,517 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-28 04:53:45,518 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 5 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:53:45,518 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 124 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:53:45,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-28 04:53:45,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2024-11-28 04:53:45,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 38 states have internal predecessors, (44), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-28 04:53:45,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2024-11-28 04:53:45,545 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 55 [2024-11-28 04:53:45,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:53:45,545 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2024-11-28 04:53:45,546 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-28 04:53:45,546 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2024-11-28 04:53:45,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-28 04:53:45,547 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:53:45,547 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:53:45,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-28 04:53:45,747 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-28 04:53:45,748 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:53:45,748 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:53:45,748 INFO L85 PathProgramCache]: Analyzing trace with hash 921028846, now seen corresponding path program 1 times [2024-11-28 04:53:45,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:53:45,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648223987] [2024-11-28 04:53:45,748 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:53:45,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:53:45,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:53:45,919 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-28 04:53:45,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:53:45,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648223987] [2024-11-28 04:53:45,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648223987] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:53:45,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105005692] [2024-11-28 04:53:45,919 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:53:45,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:53:45,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:53:45,922 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:53:45,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 04:53:46,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:53:46,009 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 04:53:46,012 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:53:46,121 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-28 04:53:46,121 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:53:46,246 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-28 04:53:46,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105005692] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:53:46,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:53:46,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2024-11-28 04:53:46,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319387853] [2024-11-28 04:53:46,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:53:46,248 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 04:53:46,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:53:46,249 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 04:53:46,249 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-11-28 04:53:46,249 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2024-11-28 04:53:46,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:53:46,546 INFO L93 Difference]: Finished difference Result 211 states and 250 transitions. [2024-11-28 04:53:46,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 04:53:46,547 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) Word has length 56 [2024-11-28 04:53:46,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:53:46,550 INFO L225 Difference]: With dead ends: 211 [2024-11-28 04:53:46,550 INFO L226 Difference]: Without dead ends: 203 [2024-11-28 04:53:46,550 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2024-11-28 04:53:46,555 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 72 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:53:46,555 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 151 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:53:46,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2024-11-28 04:53:46,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 195. [2024-11-28 04:53:46,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 125 states have (on average 1.192) internal successors, (149), 129 states have internal predecessors, (149), 44 states have call successors, (44), 25 states have call predecessors, (44), 25 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2024-11-28 04:53:46,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 233 transitions. [2024-11-28 04:53:46,621 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 233 transitions. Word has length 56 [2024-11-28 04:53:46,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:53:46,621 INFO L471 AbstractCegarLoop]: Abstraction has 195 states and 233 transitions. [2024-11-28 04:53:46,621 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2024-11-28 04:53:46,622 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 233 transitions. [2024-11-28 04:53:46,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-28 04:53:46,622 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:53:46,623 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:53:46,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 04:53:46,823 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:53:46,823 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:53:46,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:53:46,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1633980138, now seen corresponding path program 1 times [2024-11-28 04:53:46,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:53:46,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754259419] [2024-11-28 04:53:46,824 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:53:46,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:53:46,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:53:47,009 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-28 04:53:47,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:53:47,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754259419] [2024-11-28 04:53:47,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754259419] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:53:47,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930463275] [2024-11-28 04:53:47,010 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:53:47,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:53:47,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:53:47,012 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:53:47,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 04:53:47,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:53:47,080 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 04:53:47,082 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:53:47,141 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-28 04:53:47,141 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:53:47,295 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-28 04:53:47,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930463275] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:53:47,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:53:47,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-11-28 04:53:47,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931061234] [2024-11-28 04:53:47,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:53:47,296 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 04:53:47,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:53:47,296 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 04:53:47,296 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-28 04:53:47,297 INFO L87 Difference]: Start difference. First operand 195 states and 233 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-28 04:53:47,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:53:47,578 INFO L93 Difference]: Finished difference Result 279 states and 364 transitions. [2024-11-28 04:53:47,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 04:53:47,578 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 57 [2024-11-28 04:53:47,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:53:47,581 INFO L225 Difference]: With dead ends: 279 [2024-11-28 04:53:47,581 INFO L226 Difference]: Without dead ends: 259 [2024-11-28 04:53:47,581 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 109 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2024-11-28 04:53:47,582 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 60 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:53:47,582 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 249 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:53:47,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2024-11-28 04:53:47,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 235. [2024-11-28 04:53:47,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 152 states have (on average 1.2236842105263157) internal successors, (186), 155 states have internal predecessors, (186), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2024-11-28 04:53:47,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 299 transitions. [2024-11-28 04:53:47,632 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 299 transitions. Word has length 57 [2024-11-28 04:53:47,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:53:47,632 INFO L471 AbstractCegarLoop]: Abstraction has 235 states and 299 transitions. [2024-11-28 04:53:47,632 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-28 04:53:47,632 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 299 transitions. [2024-11-28 04:53:47,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-28 04:53:47,633 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:53:47,633 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:53:47,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-28 04:53:47,834 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-28 04:53:47,834 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:53:47,834 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:53:47,835 INFO L85 PathProgramCache]: Analyzing trace with hash 928720413, now seen corresponding path program 1 times [2024-11-28 04:53:47,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:53:47,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211675158] [2024-11-28 04:53:47,835 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:53:47,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:53:47,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:53:47,983 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-28 04:53:47,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:53:47,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211675158] [2024-11-28 04:53:47,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211675158] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:53:47,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080939788] [2024-11-28 04:53:47,984 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:53:47,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:53:47,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:53:47,988 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:53:47,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 04:53:48,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:53:48,065 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 04:53:48,067 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:53:48,176 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-28 04:53:48,176 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:53:48,292 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-28 04:53:48,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080939788] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:53:48,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:53:48,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2024-11-28 04:53:48,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631208573] [2024-11-28 04:53:48,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:53:48,293 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 04:53:48,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:53:48,294 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 04:53:48,294 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-11-28 04:53:48,294 INFO L87 Difference]: Start difference. First operand 235 states and 299 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2024-11-28 04:53:48,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:53:48,557 INFO L93 Difference]: Finished difference Result 344 states and 448 transitions. [2024-11-28 04:53:48,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 04:53:48,557 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) Word has length 59 [2024-11-28 04:53:48,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:53:48,562 INFO L225 Difference]: With dead ends: 344 [2024-11-28 04:53:48,562 INFO L226 Difference]: Without dead ends: 248 [2024-11-28 04:53:48,567 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2024-11-28 04:53:48,568 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 79 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:53:48,568 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 175 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:53:48,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2024-11-28 04:53:48,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 244. [2024-11-28 04:53:48,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 161 states have (on average 1.173913043478261) internal successors, (189), 164 states have internal predecessors, (189), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2024-11-28 04:53:48,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 302 transitions. [2024-11-28 04:53:48,629 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 302 transitions. Word has length 59 [2024-11-28 04:53:48,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:53:48,630 INFO L471 AbstractCegarLoop]: Abstraction has 244 states and 302 transitions. [2024-11-28 04:53:48,630 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2024-11-28 04:53:48,630 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 302 transitions. [2024-11-28 04:53:48,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-28 04:53:48,632 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:53:48,632 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:53:48,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-28 04:53:48,836 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-28 04:53:48,837 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:53:48,837 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:53:48,837 INFO L85 PathProgramCache]: Analyzing trace with hash -307698339, now seen corresponding path program 1 times [2024-11-28 04:53:48,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:53:48,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855415833] [2024-11-28 04:53:48,837 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:53:48,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:53:48,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 04:53:48,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1894937308] [2024-11-28 04:53:48,872 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:53:48,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:53:48,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:53:48,874 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:53:48,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 04:53:48,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:53:48,959 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 04:53:48,961 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:53:49,361 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-28 04:53:49,361 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:53:49,543 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-11-28 04:53:49,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:53:49,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855415833] [2024-11-28 04:53:49,544 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:53:49,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894937308] [2024-11-28 04:53:49,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894937308] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:53:49,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:53:49,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 12 [2024-11-28 04:53:49,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448535340] [2024-11-28 04:53:49,545 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:53:49,545 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 04:53:49,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:53:49,546 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 04:53:49,546 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-11-28 04:53:49,546 INFO L87 Difference]: Start difference. First operand 244 states and 302 transitions. Second operand has 12 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 9 states have internal predecessors, (40), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2024-11-28 04:53:49,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:53:49,866 INFO L93 Difference]: Finished difference Result 283 states and 355 transitions. [2024-11-28 04:53:49,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 04:53:49,867 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 9 states have internal predecessors, (40), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) Word has length 64 [2024-11-28 04:53:49,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:53:49,870 INFO L225 Difference]: With dead ends: 283 [2024-11-28 04:53:49,871 INFO L226 Difference]: Without dead ends: 278 [2024-11-28 04:53:49,873 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 114 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-11-28 04:53:49,874 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 38 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:53:49,874 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 329 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:53:49,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2024-11-28 04:53:49,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 276. [2024-11-28 04:53:49,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 183 states have (on average 1.185792349726776) internal successors, (217), 187 states have internal predecessors, (217), 65 states have call successors, (65), 27 states have call predecessors, (65), 27 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2024-11-28 04:53:49,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 343 transitions. [2024-11-28 04:53:49,934 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 343 transitions. Word has length 64 [2024-11-28 04:53:49,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:53:49,935 INFO L471 AbstractCegarLoop]: Abstraction has 276 states and 343 transitions. [2024-11-28 04:53:49,935 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 9 states have internal predecessors, (40), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2024-11-28 04:53:49,935 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 343 transitions. [2024-11-28 04:53:49,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-28 04:53:49,936 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:53:49,936 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:53:49,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 04:53:50,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:53:50,141 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:53:50,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:53:50,141 INFO L85 PathProgramCache]: Analyzing trace with hash -710006109, now seen corresponding path program 2 times [2024-11-28 04:53:50,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:53:50,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052051808] [2024-11-28 04:53:50,142 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:53:50,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:53:50,178 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:53:50,178 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:53:50,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [986867973] [2024-11-28 04:53:50,179 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:53:50,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:53:50,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:53:50,183 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:53:50,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 04:53:50,278 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:53:50,278 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:53:50,280 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-28 04:53:50,283 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:53:50,901 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-11-28 04:53:50,902 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:53:51,208 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-11-28 04:53:51,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:53:51,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052051808] [2024-11-28 04:53:51,208 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:53:51,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986867973] [2024-11-28 04:53:51,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986867973] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:53:51,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:53:51,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2024-11-28 04:53:51,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172173251] [2024-11-28 04:53:51,209 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:53:51,210 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 04:53:51,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:53:51,210 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 04:53:51,210 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2024-11-28 04:53:51,211 INFO L87 Difference]: Start difference. First operand 276 states and 343 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 13 states have internal predecessors, (40), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2024-11-28 04:53:52,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:53:52,431 INFO L93 Difference]: Finished difference Result 440 states and 595 transitions. [2024-11-28 04:53:52,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-28 04:53:52,432 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 13 states have internal predecessors, (40), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) Word has length 69 [2024-11-28 04:53:52,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:53:52,435 INFO L225 Difference]: With dead ends: 440 [2024-11-28 04:53:52,436 INFO L226 Difference]: Without dead ends: 438 [2024-11-28 04:53:52,438 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 121 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=198, Invalid=672, Unknown=0, NotChecked=0, Total=870 [2024-11-28 04:53:52,440 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 104 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 04:53:52,441 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 400 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 04:53:52,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2024-11-28 04:53:52,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 393. [2024-11-28 04:53:52,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 258 states have (on average 1.244186046511628) internal successors, (321), 262 states have internal predecessors, (321), 101 states have call successors, (101), 33 states have call predecessors, (101), 33 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) [2024-11-28 04:53:52,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 519 transitions. [2024-11-28 04:53:52,561 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 519 transitions. Word has length 69 [2024-11-28 04:53:52,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:53:52,562 INFO L471 AbstractCegarLoop]: Abstraction has 393 states and 519 transitions. [2024-11-28 04:53:52,562 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 13 states have internal predecessors, (40), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2024-11-28 04:53:52,562 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 519 transitions. [2024-11-28 04:53:52,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-28 04:53:52,563 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:53:52,563 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:53:52,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-28 04:53:52,767 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:53:52,767 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:53:52,768 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:53:52,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1589401821, now seen corresponding path program 3 times [2024-11-28 04:53:52,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:53:52,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707518639] [2024-11-28 04:53:52,768 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:53:52,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:53:52,823 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-28 04:53:52,825 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:53:52,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [166411566] [2024-11-28 04:53:52,827 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:53:52,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:53:52,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:53:52,830 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:53:52,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 04:53:52,911 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 04:53:52,911 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:53:52,912 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-28 04:53:52,915 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:53:54,136 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 37 proven. 16 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-11-28 04:53:54,136 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:53:54,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:53:54,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707518639] [2024-11-28 04:53:54,352 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:53:54,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166411566] [2024-11-28 04:53:54,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166411566] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:53:54,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:53:54,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-11-28 04:53:54,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301508532] [2024-11-28 04:53:54,352 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 04:53:54,353 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 04:53:54,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:53:54,354 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 04:53:54,354 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2024-11-28 04:53:54,354 INFO L87 Difference]: Start difference. First operand 393 states and 519 transitions. Second operand has 15 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 6 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2024-11-28 04:53:55,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:53:55,056 INFO L93 Difference]: Finished difference Result 416 states and 539 transitions. [2024-11-28 04:53:55,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 04:53:55,058 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 6 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) Word has length 74 [2024-11-28 04:53:55,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:53:55,062 INFO L225 Difference]: With dead ends: 416 [2024-11-28 04:53:55,063 INFO L226 Difference]: Without dead ends: 412 [2024-11-28 04:53:55,064 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2024-11-28 04:53:55,064 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 48 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 04:53:55,065 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 291 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 04:53:55,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2024-11-28 04:53:55,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 411. [2024-11-28 04:53:55,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 272 states have (on average 1.2279411764705883) internal successors, (334), 275 states have internal predecessors, (334), 101 states have call successors, (101), 38 states have call predecessors, (101), 37 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) [2024-11-28 04:53:55,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 532 transitions. [2024-11-28 04:53:55,187 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 532 transitions. Word has length 74 [2024-11-28 04:53:55,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:53:55,188 INFO L471 AbstractCegarLoop]: Abstraction has 411 states and 532 transitions. [2024-11-28 04:53:55,188 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 6 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2024-11-28 04:53:55,188 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 532 transitions. [2024-11-28 04:53:55,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-11-28 04:53:55,189 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:53:55,189 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:53:55,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-28 04:53:55,389 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-28 04:53:55,390 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:53:55,390 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:53:55,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1490127654, now seen corresponding path program 1 times [2024-11-28 04:53:55,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:53:55,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294437691] [2024-11-28 04:53:55,390 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:53:55,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:53:55,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 04:53:55,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [905148409] [2024-11-28 04:53:55,412 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:53:55,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:53:55,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:53:55,414 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:53:55,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 04:53:55,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:53:55,512 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-28 04:53:55,514 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:53:56,346 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2024-11-28 04:53:56,346 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:53:56,999 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-11-28 04:53:56,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:53:56,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294437691] [2024-11-28 04:53:56,999 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:53:57,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905148409] [2024-11-28 04:53:57,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905148409] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:53:57,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:53:57,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-11-28 04:53:57,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860090906] [2024-11-28 04:53:57,000 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:53:57,001 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 04:53:57,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:53:57,002 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 04:53:57,004 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-11-28 04:53:57,004 INFO L87 Difference]: Start difference. First operand 411 states and 532 transitions. Second operand has 21 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2024-11-28 04:53:59,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:53:59,830 INFO L93 Difference]: Finished difference Result 608 states and 851 transitions. [2024-11-28 04:53:59,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-28 04:53:59,831 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 80 [2024-11-28 04:53:59,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:53:59,835 INFO L225 Difference]: With dead ends: 608 [2024-11-28 04:53:59,835 INFO L226 Difference]: Without dead ends: 597 [2024-11-28 04:53:59,837 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=296, Invalid=1264, Unknown=0, NotChecked=0, Total=1560 [2024-11-28 04:53:59,837 INFO L435 NwaCegarLoop]: 61 mSDtfsCounter, 133 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-28 04:53:59,838 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 658 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-28 04:53:59,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2024-11-28 04:54:00,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 553. [2024-11-28 04:54:00,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 357 states have (on average 1.2969187675070029) internal successors, (463), 360 states have internal predecessors, (463), 156 states have call successors, (156), 39 states have call predecessors, (156), 39 states have return successors, (154), 153 states have call predecessors, (154), 154 states have call successors, (154) [2024-11-28 04:54:00,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 773 transitions. [2024-11-28 04:54:00,010 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 773 transitions. Word has length 80 [2024-11-28 04:54:00,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:54:00,011 INFO L471 AbstractCegarLoop]: Abstraction has 553 states and 773 transitions. [2024-11-28 04:54:00,011 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2024-11-28 04:54:00,011 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 773 transitions. [2024-11-28 04:54:00,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-11-28 04:54:00,012 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:54:00,013 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:54:00,022 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-28 04:54:00,215 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-28 04:54:00,215 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:54:00,215 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:54:00,216 INFO L85 PathProgramCache]: Analyzing trace with hash -948855715, now seen corresponding path program 4 times [2024-11-28 04:54:00,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:54:00,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706782752] [2024-11-28 04:54:00,216 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:54:00,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:54:00,239 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:54:00,239 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:54:00,355 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2024-11-28 04:54:00,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:54:00,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706782752] [2024-11-28 04:54:00,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706782752] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:54:00,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:54:00,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 04:54:00,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931030819] [2024-11-28 04:54:00,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:54:00,357 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:54:00,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:54:00,357 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:54:00,357 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:54:00,358 INFO L87 Difference]: Start difference. First operand 553 states and 773 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-11-28 04:54:00,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:54:00,672 INFO L93 Difference]: Finished difference Result 890 states and 1329 transitions. [2024-11-28 04:54:00,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 04:54:00,673 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 91 [2024-11-28 04:54:00,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:54:00,678 INFO L225 Difference]: With dead ends: 890 [2024-11-28 04:54:00,678 INFO L226 Difference]: Without dead ends: 626 [2024-11-28 04:54:00,679 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-28 04:54:00,680 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 12 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:54:00,680 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 186 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:54:00,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2024-11-28 04:54:00,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 531. [2024-11-28 04:54:00,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 339 states have (on average 1.2772861356932153) internal successors, (433), 342 states have internal predecessors, (433), 152 states have call successors, (152), 39 states have call predecessors, (152), 39 states have return successors, (150), 149 states have call predecessors, (150), 150 states have call successors, (150) [2024-11-28 04:54:00,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 735 transitions. [2024-11-28 04:54:00,880 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 735 transitions. Word has length 91 [2024-11-28 04:54:00,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:54:00,880 INFO L471 AbstractCegarLoop]: Abstraction has 531 states and 735 transitions. [2024-11-28 04:54:00,880 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-11-28 04:54:00,880 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 735 transitions. [2024-11-28 04:54:00,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-11-28 04:54:00,881 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:54:00,882 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:54:00,882 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-28 04:54:00,882 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:54:00,882 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:54:00,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1675679129, now seen corresponding path program 1 times [2024-11-28 04:54:00,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:54:00,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007552462] [2024-11-28 04:54:00,883 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:54:00,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:54:00,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 04:54:00,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1162059127] [2024-11-28 04:54:00,908 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:54:00,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:54:00,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:54:00,911 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:54:00,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 04:54:01,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:54:01,004 INFO L256 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-28 04:54:01,009 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:54:02,717 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2024-11-28 04:54:02,717 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:54:02,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:54:02,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007552462] [2024-11-28 04:54:02,862 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:54:02,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162059127] [2024-11-28 04:54:02,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162059127] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:54:02,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:54:02,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-11-28 04:54:02,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226371042] [2024-11-28 04:54:02,863 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 04:54:02,863 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 04:54:02,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:54:02,864 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 04:54:02,864 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2024-11-28 04:54:02,864 INFO L87 Difference]: Start difference. First operand 531 states and 735 transitions. Second operand has 16 states, 15 states have (on average 2.2) internal successors, (33), 13 states have internal predecessors, (33), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2024-11-28 04:54:04,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:54:04,337 INFO L93 Difference]: Finished difference Result 540 states and 743 transitions. [2024-11-28 04:54:04,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 04:54:04,338 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 13 states have internal predecessors, (33), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 97 [2024-11-28 04:54:04,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:54:04,342 INFO L225 Difference]: With dead ends: 540 [2024-11-28 04:54:04,342 INFO L226 Difference]: Without dead ends: 538 [2024-11-28 04:54:04,343 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2024-11-28 04:54:04,343 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 45 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:54:04,344 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 436 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-28 04:54:04,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2024-11-28 04:54:04,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 535. [2024-11-28 04:54:04,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 342 states have (on average 1.2719298245614035) internal successors, (435), 345 states have internal predecessors, (435), 152 states have call successors, (152), 40 states have call predecessors, (152), 40 states have return successors, (150), 149 states have call predecessors, (150), 150 states have call successors, (150) [2024-11-28 04:54:04,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 737 transitions. [2024-11-28 04:54:04,535 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 737 transitions. Word has length 97 [2024-11-28 04:54:04,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:54:04,536 INFO L471 AbstractCegarLoop]: Abstraction has 535 states and 737 transitions. [2024-11-28 04:54:04,536 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 13 states have internal predecessors, (33), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2024-11-28 04:54:04,536 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 737 transitions. [2024-11-28 04:54:04,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-11-28 04:54:04,540 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:54:04,541 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:54:04,552 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-28 04:54:04,745 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-28 04:54:04,746 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:54:04,746 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:54:04,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1301197190, now seen corresponding path program 1 times [2024-11-28 04:54:04,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:54:04,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373357736] [2024-11-28 04:54:04,747 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:54:04,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:54:04,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:54:04,947 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 46 proven. 11 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2024-11-28 04:54:04,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:54:04,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373357736] [2024-11-28 04:54:04,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373357736] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:54:04,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256939851] [2024-11-28 04:54:04,948 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:54:04,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:54:04,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:54:04,950 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:54:04,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 04:54:05,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:54:05,044 INFO L256 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 04:54:05,046 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:54:05,093 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 92 proven. 11 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2024-11-28 04:54:05,093 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:54:05,219 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 46 proven. 11 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2024-11-28 04:54:05,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256939851] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:54:05,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:54:05,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2024-11-28 04:54:05,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963006777] [2024-11-28 04:54:05,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:54:05,220 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 04:54:05,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:54:05,221 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 04:54:05,221 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-28 04:54:05,221 INFO L87 Difference]: Start difference. First operand 535 states and 737 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 4 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2024-11-28 04:54:05,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:54:05,703 INFO L93 Difference]: Finished difference Result 731 states and 1053 transitions. [2024-11-28 04:54:05,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 04:54:05,704 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 4 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 112 [2024-11-28 04:54:05,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:54:05,709 INFO L225 Difference]: With dead ends: 731 [2024-11-28 04:54:05,709 INFO L226 Difference]: Without dead ends: 718 [2024-11-28 04:54:05,710 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 223 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2024-11-28 04:54:05,710 INFO L435 NwaCegarLoop]: 84 mSDtfsCounter, 31 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:54:05,710 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 403 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:54:05,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2024-11-28 04:54:05,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 579. [2024-11-28 04:54:05,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 378 states have (on average 1.2777777777777777) internal successors, (483), 381 states have internal predecessors, (483), 160 states have call successors, (160), 40 states have call predecessors, (160), 40 states have return successors, (158), 157 states have call predecessors, (158), 158 states have call successors, (158) [2024-11-28 04:54:05,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 801 transitions. [2024-11-28 04:54:05,901 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 801 transitions. Word has length 112 [2024-11-28 04:54:05,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:54:05,901 INFO L471 AbstractCegarLoop]: Abstraction has 579 states and 801 transitions. [2024-11-28 04:54:05,901 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 4 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2024-11-28 04:54:05,902 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 801 transitions. [2024-11-28 04:54:05,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-11-28 04:54:05,903 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:54:05,903 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:54:05,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-28 04:54:06,104 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-28 04:54:06,104 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:54:06,105 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:54:06,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1536159999, now seen corresponding path program 1 times [2024-11-28 04:54:06,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:54:06,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149811577] [2024-11-28 04:54:06,105 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:54:06,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:54:06,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:54:06,419 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-11-28 04:54:06,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:54:06,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149811577] [2024-11-28 04:54:06,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149811577] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:54:06,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059007279] [2024-11-28 04:54:06,420 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:54:06,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:54:06,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:54:06,422 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:54:06,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 04:54:06,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:54:06,506 INFO L256 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 04:54:06,508 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:54:06,636 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 229 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2024-11-28 04:54:06,636 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:54:06,869 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-11-28 04:54:06,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059007279] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:54:06,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:54:06,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 18 [2024-11-28 04:54:06,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023946490] [2024-11-28 04:54:06,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:54:06,870 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 04:54:06,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:54:06,871 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 04:54:06,871 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2024-11-28 04:54:06,871 INFO L87 Difference]: Start difference. First operand 579 states and 801 transitions. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 9 states have call successors, (49), 6 states have call predecessors, (49), 5 states have return successors, (48), 8 states have call predecessors, (48), 8 states have call successors, (48) [2024-11-28 04:54:08,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:54:08,077 INFO L93 Difference]: Finished difference Result 1898 states and 2638 transitions. [2024-11-28 04:54:08,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-28 04:54:08,078 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 9 states have call successors, (49), 6 states have call predecessors, (49), 5 states have return successors, (48), 8 states have call predecessors, (48), 8 states have call successors, (48) Word has length 112 [2024-11-28 04:54:08,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:54:08,088 INFO L225 Difference]: With dead ends: 1898 [2024-11-28 04:54:08,088 INFO L226 Difference]: Without dead ends: 1589 [2024-11-28 04:54:08,090 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=311, Invalid=559, Unknown=0, NotChecked=0, Total=870 [2024-11-28 04:54:08,090 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 247 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 04:54:08,091 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 243 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 04:54:08,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2024-11-28 04:54:08,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1515. [2024-11-28 04:54:08,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1515 states, 949 states have (on average 1.2054794520547945) internal successors, (1144), 966 states have internal predecessors, (1144), 429 states have call successors, (429), 136 states have call predecessors, (429), 136 states have return successors, (413), 412 states have call predecessors, (413), 413 states have call successors, (413) [2024-11-28 04:54:08,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1515 states to 1515 states and 1986 transitions. [2024-11-28 04:54:08,558 INFO L78 Accepts]: Start accepts. Automaton has 1515 states and 1986 transitions. Word has length 112 [2024-11-28 04:54:08,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:54:08,558 INFO L471 AbstractCegarLoop]: Abstraction has 1515 states and 1986 transitions. [2024-11-28 04:54:08,559 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 9 states have call successors, (49), 6 states have call predecessors, (49), 5 states have return successors, (48), 8 states have call predecessors, (48), 8 states have call successors, (48) [2024-11-28 04:54:08,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1515 states and 1986 transitions. [2024-11-28 04:54:08,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2024-11-28 04:54:08,560 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:54:08,560 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:54:08,571 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-28 04:54:08,761 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:54:08,761 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:54:08,762 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:54:08,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1745074663, now seen corresponding path program 2 times [2024-11-28 04:54:08,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:54:08,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943836501] [2024-11-28 04:54:08,762 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:54:08,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:54:08,796 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:54:08,797 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:54:08,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [620322730] [2024-11-28 04:54:08,798 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:54:08,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:54:08,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:54:08,802 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:54:08,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 04:54:08,905 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:54:08,905 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:54:08,912 INFO L256 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-28 04:54:08,916 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:54:09,912 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 58 proven. 56 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2024-11-28 04:54:09,913 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:54:10,146 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 78 proven. 7 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2024-11-28 04:54:10,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:54:10,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943836501] [2024-11-28 04:54:10,146 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:54:10,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620322730] [2024-11-28 04:54:10,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620322730] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:54:10,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:54:10,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 23 [2024-11-28 04:54:10,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048325602] [2024-11-28 04:54:10,147 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:54:10,148 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 04:54:10,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:54:10,148 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 04:54:10,149 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2024-11-28 04:54:10,149 INFO L87 Difference]: Start difference. First operand 1515 states and 1986 transitions. Second operand has 23 states, 22 states have (on average 2.772727272727273) internal successors, (61), 20 states have internal predecessors, (61), 9 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (28), 10 states have call predecessors, (28), 9 states have call successors, (28) [2024-11-28 04:54:11,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:54:11,982 INFO L93 Difference]: Finished difference Result 1674 states and 2186 transitions. [2024-11-28 04:54:11,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-28 04:54:11,982 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.772727272727273) internal successors, (61), 20 states have internal predecessors, (61), 9 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (28), 10 states have call predecessors, (28), 9 states have call successors, (28) Word has length 114 [2024-11-28 04:54:11,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:54:11,994 INFO L225 Difference]: With dead ends: 1674 [2024-11-28 04:54:11,995 INFO L226 Difference]: Without dead ends: 1659 [2024-11-28 04:54:11,997 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2024-11-28 04:54:11,998 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 93 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 04:54:12,000 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 595 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 04:54:12,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1659 states. [2024-11-28 04:54:12,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1659 to 1585. [2024-11-28 04:54:12,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1011 states have (on average 1.1998021760633037) internal successors, (1213), 1025 states have internal predecessors, (1213), 422 states have call successors, (422), 151 states have call predecessors, (422), 151 states have return successors, (413), 408 states have call predecessors, (413), 413 states have call successors, (413) [2024-11-28 04:54:12,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 2048 transitions. [2024-11-28 04:54:12,609 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 2048 transitions. Word has length 114 [2024-11-28 04:54:12,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:54:12,610 INFO L471 AbstractCegarLoop]: Abstraction has 1585 states and 2048 transitions. [2024-11-28 04:54:12,610 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.772727272727273) internal successors, (61), 20 states have internal predecessors, (61), 9 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (28), 10 states have call predecessors, (28), 9 states have call successors, (28) [2024-11-28 04:54:12,610 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 2048 transitions. [2024-11-28 04:54:12,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2024-11-28 04:54:12,612 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:54:12,612 INFO L218 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:54:12,622 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-28 04:54:12,813 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:54:12,813 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:54:12,813 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:54:12,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1186603161, now seen corresponding path program 3 times [2024-11-28 04:54:12,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:54:12,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138288479] [2024-11-28 04:54:12,814 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:54:12,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:54:12,861 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-28 04:54:12,861 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:54:12,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1227255075] [2024-11-28 04:54:12,863 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:54:12,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:54:12,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:54:12,867 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:54:12,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 04:54:12,958 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 04:54:12,958 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:54:12,961 INFO L256 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-28 04:54:12,965 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:54:13,866 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 37 proven. 46 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2024-11-28 04:54:13,866 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:54:14,880 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 38 proven. 36 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2024-11-28 04:54:14,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:54:14,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138288479] [2024-11-28 04:54:14,880 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:54:14,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227255075] [2024-11-28 04:54:14,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227255075] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:54:14,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:54:14,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2024-11-28 04:54:14,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592454885] [2024-11-28 04:54:14,881 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:54:14,882 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 04:54:14,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:54:14,882 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 04:54:14,882 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2024-11-28 04:54:14,883 INFO L87 Difference]: Start difference. First operand 1585 states and 2048 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 22 states have internal predecessors, (62), 11 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2024-11-28 04:54:19,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:54:19,059 INFO L93 Difference]: Finished difference Result 2220 states and 2938 transitions. [2024-11-28 04:54:19,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-28 04:54:19,060 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 22 states have internal predecessors, (62), 11 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) Word has length 119 [2024-11-28 04:54:19,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:54:19,071 INFO L225 Difference]: With dead ends: 2220 [2024-11-28 04:54:19,072 INFO L226 Difference]: Without dead ends: 2218 [2024-11-28 04:54:19,073 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=401, Invalid=1669, Unknown=0, NotChecked=0, Total=2070 [2024-11-28 04:54:19,074 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 147 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:54:19,074 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 631 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-28 04:54:19,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2218 states. [2024-11-28 04:54:19,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2218 to 2067. [2024-11-28 04:54:19,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2067 states, 1330 states have (on average 1.2150375939849625) internal successors, (1616), 1343 states have internal predecessors, (1616), 548 states have call successors, (548), 188 states have call predecessors, (548), 188 states have return successors, (539), 535 states have call predecessors, (539), 539 states have call successors, (539) [2024-11-28 04:54:19,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2067 states to 2067 states and 2703 transitions. [2024-11-28 04:54:19,930 INFO L78 Accepts]: Start accepts. Automaton has 2067 states and 2703 transitions. Word has length 119 [2024-11-28 04:54:19,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:54:19,931 INFO L471 AbstractCegarLoop]: Abstraction has 2067 states and 2703 transitions. [2024-11-28 04:54:19,931 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 22 states have internal predecessors, (62), 11 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2024-11-28 04:54:19,931 INFO L276 IsEmpty]: Start isEmpty. Operand 2067 states and 2703 transitions. [2024-11-28 04:54:19,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-11-28 04:54:19,933 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:54:19,933 INFO L218 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:54:19,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-28 04:54:20,137 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:54:20,137 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:54:20,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:54:20,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1466579619, now seen corresponding path program 4 times [2024-11-28 04:54:20,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:54:20,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925361557] [2024-11-28 04:54:20,138 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:54:20,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:54:20,167 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:54:20,167 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:54:20,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [732374632] [2024-11-28 04:54:20,169 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:54:20,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:54:20,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:54:20,171 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:54:20,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-28 04:54:20,263 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:54:20,263 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:54:20,265 INFO L256 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-28 04:54:20,270 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:54:22,033 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 100 proven. 59 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2024-11-28 04:54:22,033 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:54:22,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:54:22,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925361557] [2024-11-28 04:54:22,297 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:54:22,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732374632] [2024-11-28 04:54:22,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732374632] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:54:22,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:54:22,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-11-28 04:54:22,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552992081] [2024-11-28 04:54:22,298 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 04:54:22,298 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 04:54:22,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:54:22,298 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 04:54:22,299 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2024-11-28 04:54:22,299 INFO L87 Difference]: Start difference. First operand 2067 states and 2703 transitions. Second operand has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 14 states have internal predecessors, (36), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2024-11-28 04:54:24,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:54:24,090 INFO L93 Difference]: Finished difference Result 2180 states and 2839 transitions. [2024-11-28 04:54:24,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 04:54:24,091 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 14 states have internal predecessors, (36), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) Word has length 120 [2024-11-28 04:54:24,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:54:24,103 INFO L225 Difference]: With dead ends: 2180 [2024-11-28 04:54:24,103 INFO L226 Difference]: Without dead ends: 2178 [2024-11-28 04:54:24,104 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2024-11-28 04:54:24,106 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 44 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-28 04:54:24,106 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 423 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-28 04:54:24,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2178 states. [2024-11-28 04:54:24,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2178 to 2064. [2024-11-28 04:54:24,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2064 states, 1330 states have (on average 1.2135338345864661) internal successors, (1614), 1343 states have internal predecessors, (1614), 544 states have call successors, (544), 189 states have call predecessors, (544), 189 states have return successors, (535), 531 states have call predecessors, (535), 535 states have call successors, (535) [2024-11-28 04:54:24,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 2693 transitions. [2024-11-28 04:54:24,841 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 2693 transitions. Word has length 120 [2024-11-28 04:54:24,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:54:24,842 INFO L471 AbstractCegarLoop]: Abstraction has 2064 states and 2693 transitions. [2024-11-28 04:54:24,842 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 14 states have internal predecessors, (36), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2024-11-28 04:54:24,842 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 2693 transitions. [2024-11-28 04:54:24,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-28 04:54:24,844 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:54:24,844 INFO L218 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:54:24,853 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-28 04:54:25,048 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:54:25,048 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:54:25,048 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:54:25,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1739915623, now seen corresponding path program 5 times [2024-11-28 04:54:25,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:54:25,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581646759] [2024-11-28 04:54:25,049 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:54:25,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:54:25,091 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-28 04:54:25,092 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:54:25,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1595845340] [2024-11-28 04:54:25,094 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:54:25,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:54:25,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:54:25,096 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:54:25,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-28 04:54:25,320 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-28 04:54:25,321 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:54:25,323 INFO L256 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-28 04:54:25,328 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:54:26,919 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 74 proven. 56 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2024-11-28 04:54:26,919 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:54:27,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:54:27,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581646759] [2024-11-28 04:54:27,339 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:54:27,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595845340] [2024-11-28 04:54:27,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595845340] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:54:27,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:54:27,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-11-28 04:54:27,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656240790] [2024-11-28 04:54:27,339 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 04:54:27,340 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 04:54:27,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:54:27,340 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 04:54:27,340 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2024-11-28 04:54:27,340 INFO L87 Difference]: Start difference. First operand 2064 states and 2693 transitions. Second operand has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 15 states have internal predecessors, (40), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) [2024-11-28 04:54:29,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:54:29,594 INFO L93 Difference]: Finished difference Result 2321 states and 3041 transitions. [2024-11-28 04:54:29,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 04:54:29,595 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 15 states have internal predecessors, (40), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) Word has length 124 [2024-11-28 04:54:29,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:54:29,607 INFO L225 Difference]: With dead ends: 2321 [2024-11-28 04:54:29,607 INFO L226 Difference]: Without dead ends: 2319 [2024-11-28 04:54:29,608 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2024-11-28 04:54:29,609 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 54 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-28 04:54:29,609 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 578 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-28 04:54:29,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2319 states. [2024-11-28 04:54:30,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2319 to 2276. [2024-11-28 04:54:30,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2276 states, 1456 states have (on average 1.2087912087912087) internal successors, (1760), 1469 states have internal predecessors, (1760), 616 states have call successors, (616), 203 states have call predecessors, (616), 203 states have return successors, (607), 603 states have call predecessors, (607), 607 states have call successors, (607) [2024-11-28 04:54:30,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 2983 transitions. [2024-11-28 04:54:30,350 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 2983 transitions. Word has length 124 [2024-11-28 04:54:30,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:54:30,350 INFO L471 AbstractCegarLoop]: Abstraction has 2276 states and 2983 transitions. [2024-11-28 04:54:30,350 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 15 states have internal predecessors, (40), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) [2024-11-28 04:54:30,351 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 2983 transitions. [2024-11-28 04:54:30,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2024-11-28 04:54:30,352 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:54:30,352 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:54:30,358 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-28 04:54:30,553 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:54:30,553 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:54:30,553 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:54:30,554 INFO L85 PathProgramCache]: Analyzing trace with hash -379532178, now seen corresponding path program 1 times [2024-11-28 04:54:30,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:54:30,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493246535] [2024-11-28 04:54:30,554 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:54:30,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:54:30,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:54:30,908 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 50 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2024-11-28 04:54:30,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:54:30,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493246535] [2024-11-28 04:54:30,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493246535] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:54:30,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691302368] [2024-11-28 04:54:30,909 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:54:30,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:54:30,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:54:30,911 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:54:30,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-28 04:54:31,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:54:31,014 INFO L256 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 04:54:31,022 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:54:31,204 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 434 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-11-28 04:54:31,204 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:54:31,447 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 50 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2024-11-28 04:54:31,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691302368] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:54:31,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:54:31,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 18 [2024-11-28 04:54:31,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550617125] [2024-11-28 04:54:31,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:54:31,448 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 04:54:31,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:54:31,449 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 04:54:31,449 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2024-11-28 04:54:31,449 INFO L87 Difference]: Start difference. First operand 2276 states and 2983 transitions. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 11 states have call successors, (61), 7 states have call predecessors, (61), 6 states have return successors, (60), 10 states have call predecessors, (60), 10 states have call successors, (60) [2024-11-28 04:54:32,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:54:32,538 INFO L93 Difference]: Finished difference Result 2350 states and 3055 transitions. [2024-11-28 04:54:32,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-28 04:54:32,539 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 11 states have call successors, (61), 7 states have call predecessors, (61), 6 states have return successors, (60), 10 states have call predecessors, (60), 10 states have call successors, (60) Word has length 129 [2024-11-28 04:54:32,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:54:32,551 INFO L225 Difference]: With dead ends: 2350 [2024-11-28 04:54:32,551 INFO L226 Difference]: Without dead ends: 2308 [2024-11-28 04:54:32,552 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=312, Invalid=558, Unknown=0, NotChecked=0, Total=870 [2024-11-28 04:54:32,553 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 191 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:54:32,553 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 265 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 04:54:32,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2308 states. [2024-11-28 04:54:33,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2308 to 2294. [2024-11-28 04:54:33,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2294 states, 1474 states have (on average 1.182496607869742) internal successors, (1743), 1487 states have internal predecessors, (1743), 616 states have call successors, (616), 203 states have call predecessors, (616), 203 states have return successors, (607), 603 states have call predecessors, (607), 607 states have call successors, (607) [2024-11-28 04:54:33,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2294 states to 2294 states and 2966 transitions. [2024-11-28 04:54:33,611 INFO L78 Accepts]: Start accepts. Automaton has 2294 states and 2966 transitions. Word has length 129 [2024-11-28 04:54:33,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:54:33,612 INFO L471 AbstractCegarLoop]: Abstraction has 2294 states and 2966 transitions. [2024-11-28 04:54:33,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 11 states have call successors, (61), 7 states have call predecessors, (61), 6 states have return successors, (60), 10 states have call predecessors, (60), 10 states have call successors, (60) [2024-11-28 04:54:33,612 INFO L276 IsEmpty]: Start isEmpty. Operand 2294 states and 2966 transitions. [2024-11-28 04:54:33,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2024-11-28 04:54:33,614 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:54:33,614 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:54:33,624 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-28 04:54:33,815 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:54:33,815 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:54:33,815 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:54:33,815 INFO L85 PathProgramCache]: Analyzing trace with hash 998301078, now seen corresponding path program 2 times [2024-11-28 04:54:33,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:54:33,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884189142] [2024-11-28 04:54:33,815 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:54:33,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:54:33,843 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:54:33,843 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:54:33,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [451904170] [2024-11-28 04:54:33,844 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:54:33,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:54:33,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:54:33,848 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:54:33,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-28 04:54:33,956 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:54:33,956 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:54:33,962 INFO L256 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-11-28 04:54:33,966 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:54:35,048 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 73 proven. 65 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2024-11-28 04:54:35,048 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:54:36,526 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 73 proven. 56 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2024-11-28 04:54:36,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:54:36,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884189142] [2024-11-28 04:54:36,526 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:54:36,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451904170] [2024-11-28 04:54:36,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451904170] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:54:36,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:54:36,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 30 [2024-11-28 04:54:36,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067748550] [2024-11-28 04:54:36,527 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:54:36,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-28 04:54:36,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:54:36,528 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-28 04:54:36,528 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2024-11-28 04:54:36,529 INFO L87 Difference]: Start difference. First operand 2294 states and 2966 transitions. Second operand has 30 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 15 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (40), 13 states have call predecessors, (40), 13 states have call successors, (40) [2024-11-28 04:54:41,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-28 04:54:48,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:54:48,768 INFO L93 Difference]: Finished difference Result 2644 states and 3487 transitions. [2024-11-28 04:54:48,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-28 04:54:48,769 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 15 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (40), 13 states have call predecessors, (40), 13 states have call successors, (40) Word has length 130 [2024-11-28 04:54:48,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:54:48,780 INFO L225 Difference]: With dead ends: 2644 [2024-11-28 04:54:48,780 INFO L226 Difference]: Without dead ends: 2601 [2024-11-28 04:54:48,781 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=810, Invalid=3222, Unknown=0, NotChecked=0, Total=4032 [2024-11-28 04:54:48,782 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 276 mSDsluCounter, 881 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 250 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 949 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2024-11-28 04:54:48,782 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 949 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 912 Invalid, 1 Unknown, 0 Unchecked, 7.4s Time] [2024-11-28 04:54:48,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2601 states. [2024-11-28 04:54:50,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2601 to 2534. [2024-11-28 04:54:50,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2534 states, 1600 states have (on average 1.188125) internal successors, (1901), 1612 states have internal predecessors, (1901), 724 states have call successors, (724), 209 states have call predecessors, (724), 209 states have return successors, (717), 712 states have call predecessors, (717), 717 states have call successors, (717) [2024-11-28 04:54:50,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2534 states to 2534 states and 3342 transitions. [2024-11-28 04:54:50,508 INFO L78 Accepts]: Start accepts. Automaton has 2534 states and 3342 transitions. Word has length 130 [2024-11-28 04:54:50,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:54:50,508 INFO L471 AbstractCegarLoop]: Abstraction has 2534 states and 3342 transitions. [2024-11-28 04:54:50,509 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 15 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (40), 13 states have call predecessors, (40), 13 states have call successors, (40) [2024-11-28 04:54:50,509 INFO L276 IsEmpty]: Start isEmpty. Operand 2534 states and 3342 transitions. [2024-11-28 04:54:50,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2024-11-28 04:54:50,510 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:54:50,511 INFO L218 NwaCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:54:50,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-28 04:54:50,715 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-28 04:54:50,715 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:54:50,715 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:54:50,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1091217127, now seen corresponding path program 6 times [2024-11-28 04:54:50,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:54:50,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707945666] [2024-11-28 04:54:50,716 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:54:50,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:54:50,769 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-11-28 04:54:50,769 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:54:50,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [696280074] [2024-11-28 04:54:50,772 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:54:50,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:54:50,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:54:50,774 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:54:50,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-28 04:54:50,906 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-28 04:54:50,906 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:54:50,912 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-28 04:54:50,916 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:54:53,180 INFO L134 CoverageAnalysis]: Checked inductivity of 815 backedges. 118 proven. 34 refuted. 0 times theorem prover too weak. 663 trivial. 0 not checked. [2024-11-28 04:54:53,180 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:54:54,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:54:54,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707945666] [2024-11-28 04:54:54,220 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:54:54,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696280074] [2024-11-28 04:54:54,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696280074] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:54:54,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:54:54,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-11-28 04:54:54,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591585535] [2024-11-28 04:54:54,221 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 04:54:54,221 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 04:54:54,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:54:54,222 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 04:54:54,222 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2024-11-28 04:54:54,222 INFO L87 Difference]: Start difference. First operand 2534 states and 3342 transitions. Second operand has 17 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2024-11-28 04:54:56,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:54:56,138 INFO L93 Difference]: Finished difference Result 2597 states and 3415 transitions. [2024-11-28 04:54:56,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 04:54:56,139 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 143 [2024-11-28 04:54:56,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:54:56,155 INFO L225 Difference]: With dead ends: 2597 [2024-11-28 04:54:56,155 INFO L226 Difference]: Without dead ends: 2595 [2024-11-28 04:54:56,157 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2024-11-28 04:54:56,157 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 41 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 04:54:56,158 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 436 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 04:54:56,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2595 states. [2024-11-28 04:54:58,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2595 to 2580. [2024-11-28 04:54:58,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2580 states, 1630 states have (on average 1.1865030674846626) internal successors, (1934), 1642 states have internal predecessors, (1934), 732 states have call successors, (732), 217 states have call predecessors, (732), 217 states have return successors, (725), 720 states have call predecessors, (725), 725 states have call successors, (725) [2024-11-28 04:54:58,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2580 states to 2580 states and 3391 transitions. [2024-11-28 04:54:58,024 INFO L78 Accepts]: Start accepts. Automaton has 2580 states and 3391 transitions. Word has length 143 [2024-11-28 04:54:58,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:54:58,024 INFO L471 AbstractCegarLoop]: Abstraction has 2580 states and 3391 transitions. [2024-11-28 04:54:58,025 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2024-11-28 04:54:58,025 INFO L276 IsEmpty]: Start isEmpty. Operand 2580 states and 3391 transitions. [2024-11-28 04:54:58,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2024-11-28 04:54:58,026 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:54:58,026 INFO L218 NwaCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:54:58,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-28 04:54:58,227 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-28 04:54:58,227 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:54:58,227 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:54:58,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1556970589, now seen corresponding path program 7 times [2024-11-28 04:54:58,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:54:58,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682451697] [2024-11-28 04:54:58,227 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:54:58,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:54:58,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 04:54:58,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1157818997] [2024-11-28 04:54:58,255 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:54:58,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:54:58,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:54:58,257 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:54:58,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-28 04:54:58,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:54:58,377 INFO L256 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-11-28 04:54:58,383 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:55:01,206 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 96 proven. 129 refuted. 0 times theorem prover too weak. 597 trivial. 0 not checked. [2024-11-28 04:55:01,206 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:55:01,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:55:01,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682451697] [2024-11-28 04:55:01,420 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:55:01,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157818997] [2024-11-28 04:55:01,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157818997] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:55:01,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:55:01,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-11-28 04:55:01,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876378649] [2024-11-28 04:55:01,420 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 04:55:01,421 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 04:55:01,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:55:01,421 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 04:55:01,421 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2024-11-28 04:55:01,421 INFO L87 Difference]: Start difference. First operand 2580 states and 3391 transitions. Second operand has 21 states, 20 states have (on average 2.15) internal successors, (43), 17 states have internal predecessors, (43), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 9 states have call predecessors, (23), 8 states have call successors, (23) [2024-11-28 04:55:04,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:55:04,434 INFO L93 Difference]: Finished difference Result 2617 states and 3427 transitions. [2024-11-28 04:55:04,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 04:55:04,434 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 17 states have internal predecessors, (43), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 9 states have call predecessors, (23), 8 states have call successors, (23) Word has length 147 [2024-11-28 04:55:04,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:55:04,448 INFO L225 Difference]: With dead ends: 2617 [2024-11-28 04:55:04,448 INFO L226 Difference]: Without dead ends: 2615 [2024-11-28 04:55:04,450 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2024-11-28 04:55:04,450 INFO L435 NwaCegarLoop]: 61 mSDtfsCounter, 57 mSDsluCounter, 841 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 902 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:55:04,451 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 902 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 881 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-28 04:55:04,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2615 states. [2024-11-28 04:55:05,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2615 to 2604. [2024-11-28 04:55:05,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2604 states, 1648 states have (on average 1.1838592233009708) internal successors, (1951), 1660 states have internal predecessors, (1951), 732 states have call successors, (732), 223 states have call predecessors, (732), 223 states have return successors, (725), 720 states have call predecessors, (725), 725 states have call successors, (725) [2024-11-28 04:55:05,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2604 states to 2604 states and 3408 transitions. [2024-11-28 04:55:05,935 INFO L78 Accepts]: Start accepts. Automaton has 2604 states and 3408 transitions. Word has length 147 [2024-11-28 04:55:05,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:55:05,936 INFO L471 AbstractCegarLoop]: Abstraction has 2604 states and 3408 transitions. [2024-11-28 04:55:05,936 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 17 states have internal predecessors, (43), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 9 states have call predecessors, (23), 8 states have call successors, (23) [2024-11-28 04:55:05,936 INFO L276 IsEmpty]: Start isEmpty. Operand 2604 states and 3408 transitions. [2024-11-28 04:55:05,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2024-11-28 04:55:05,938 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:55:05,938 INFO L218 NwaCegarLoop]: trace histogram [23, 22, 22, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:55:05,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-11-28 04:55:06,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-28 04:55:06,140 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:55:06,140 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:55:06,140 INFO L85 PathProgramCache]: Analyzing trace with hash 937473503, now seen corresponding path program 8 times [2024-11-28 04:55:06,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:55:06,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271983454] [2024-11-28 04:55:06,141 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:55:06,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:55:06,168 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:55:06,168 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:55:06,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1163341353] [2024-11-28 04:55:06,170 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:55:06,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:55:06,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:55:06,172 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:55:06,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-28 04:55:06,294 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:55:06,294 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:55:06,297 INFO L256 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-11-28 04:55:06,301 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:55:07,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1097 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2024-11-28 04:55:07,884 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:55:11,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1097 backedges. 110 proven. 102 refuted. 0 times theorem prover too weak. 885 trivial. 0 not checked. [2024-11-28 04:55:11,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:55:11,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271983454] [2024-11-28 04:55:11,046 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:55:11,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163341353] [2024-11-28 04:55:11,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163341353] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:55:11,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:55:11,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 33 [2024-11-28 04:55:11,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689452245] [2024-11-28 04:55:11,046 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:55:11,047 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-28 04:55:11,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:55:11,047 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-28 04:55:11,048 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=874, Unknown=0, NotChecked=0, Total=1056 [2024-11-28 04:55:11,048 INFO L87 Difference]: Start difference. First operand 2604 states and 3408 transitions. Second operand has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 30 states have internal predecessors, (79), 16 states have call successors, (52), 3 states have call predecessors, (52), 3 states have return successors, (51), 17 states have call predecessors, (51), 16 states have call successors, (51) [2024-11-28 04:55:21,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:55:21,017 INFO L93 Difference]: Finished difference Result 2938 states and 3864 transitions. [2024-11-28 04:55:21,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-28 04:55:21,018 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 30 states have internal predecessors, (79), 16 states have call successors, (52), 3 states have call predecessors, (52), 3 states have return successors, (51), 17 states have call predecessors, (51), 16 states have call successors, (51) Word has length 165 [2024-11-28 04:55:21,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:55:21,031 INFO L225 Difference]: With dead ends: 2938 [2024-11-28 04:55:21,032 INFO L226 Difference]: Without dead ends: 2936 [2024-11-28 04:55:21,034 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=752, Invalid=3030, Unknown=0, NotChecked=0, Total=3782 [2024-11-28 04:55:21,035 INFO L435 NwaCegarLoop]: 79 mSDtfsCounter, 173 mSDsluCounter, 1023 mSDsCounter, 0 mSdLazyCounter, 1151 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 1102 SdHoareTripleChecker+Invalid, 1325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 1151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2024-11-28 04:55:21,035 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 1102 Invalid, 1325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 1151 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2024-11-28 04:55:21,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2936 states. [2024-11-28 04:55:22,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2936 to 2894. [2024-11-28 04:55:22,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2894 states, 1834 states have (on average 1.1897491821155943) internal successors, (2182), 1847 states have internal predecessors, (2182), 814 states have call successors, (814), 245 states have call predecessors, (814), 245 states have return successors, (807), 801 states have call predecessors, (807), 807 states have call successors, (807) [2024-11-28 04:55:22,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2894 states to 2894 states and 3803 transitions. [2024-11-28 04:55:22,951 INFO L78 Accepts]: Start accepts. Automaton has 2894 states and 3803 transitions. Word has length 165 [2024-11-28 04:55:22,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:55:22,951 INFO L471 AbstractCegarLoop]: Abstraction has 2894 states and 3803 transitions. [2024-11-28 04:55:22,952 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 30 states have internal predecessors, (79), 16 states have call successors, (52), 3 states have call predecessors, (52), 3 states have return successors, (51), 17 states have call predecessors, (51), 16 states have call successors, (51) [2024-11-28 04:55:22,952 INFO L276 IsEmpty]: Start isEmpty. Operand 2894 states and 3803 transitions. [2024-11-28 04:55:22,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2024-11-28 04:55:22,954 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:55:22,954 INFO L218 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:55:22,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-11-28 04:55:23,154 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-28 04:55:23,154 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:55:23,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:55:23,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1509933593, now seen corresponding path program 9 times [2024-11-28 04:55:23,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:55:23,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884833985] [2024-11-28 04:55:23,155 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:55:23,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:55:23,213 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-28 04:55:23,213 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:55:23,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1635255951] [2024-11-28 04:55:23,215 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:55:23,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:55:23,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:55:23,219 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:55:23,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-28 04:55:23,338 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 04:55:23,338 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:55:23,340 INFO L256 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-28 04:55:23,344 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:55:25,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1192 backedges. 141 proven. 69 refuted. 0 times theorem prover too weak. 982 trivial. 0 not checked. [2024-11-28 04:55:25,360 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:55:25,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:55:25,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884833985] [2024-11-28 04:55:25,589 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:55:25,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635255951] [2024-11-28 04:55:25,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635255951] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:55:25,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:55:25,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-11-28 04:55:25,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635174705] [2024-11-28 04:55:25,590 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 04:55:25,590 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 04:55:25,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:55:25,590 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 04:55:25,591 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2024-11-28 04:55:25,591 INFO L87 Difference]: Start difference. First operand 2894 states and 3803 transitions. Second operand has 18 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) [2024-11-28 04:55:28,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:55:28,376 INFO L93 Difference]: Finished difference Result 3163 states and 4143 transitions. [2024-11-28 04:55:28,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 04:55:28,377 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) Word has length 170 [2024-11-28 04:55:28,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:55:28,391 INFO L225 Difference]: With dead ends: 3163 [2024-11-28 04:55:28,391 INFO L226 Difference]: Without dead ends: 3161 [2024-11-28 04:55:28,393 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2024-11-28 04:55:28,394 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 44 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 04:55:28,394 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 686 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 04:55:28,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3161 states. [2024-11-28 04:55:30,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3161 to 3011. [2024-11-28 04:55:30,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3011 states, 1910 states have (on average 1.1837696335078534) internal successors, (2261), 1926 states have internal predecessors, (2261), 838 states have call successors, (838), 262 states have call predecessors, (838), 262 states have return successors, (831), 822 states have call predecessors, (831), 831 states have call successors, (831) [2024-11-28 04:55:30,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3011 states to 3011 states and 3930 transitions. [2024-11-28 04:55:30,424 INFO L78 Accepts]: Start accepts. Automaton has 3011 states and 3930 transitions. Word has length 170 [2024-11-28 04:55:30,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:55:30,425 INFO L471 AbstractCegarLoop]: Abstraction has 3011 states and 3930 transitions. [2024-11-28 04:55:30,425 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) [2024-11-28 04:55:30,425 INFO L276 IsEmpty]: Start isEmpty. Operand 3011 states and 3930 transitions. [2024-11-28 04:55:30,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2024-11-28 04:55:30,428 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:55:30,428 INFO L218 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:55:30,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-11-28 04:55:30,628 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-28 04:55:30,629 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:55:30,629 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:55:30,629 INFO L85 PathProgramCache]: Analyzing trace with hash 600535841, now seen corresponding path program 10 times [2024-11-28 04:55:30,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:55:30,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743334749] [2024-11-28 04:55:30,630 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:55:30,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:55:30,672 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:55:30,672 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:55:30,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [416271353] [2024-11-28 04:55:30,674 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:55:30,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:55:30,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:55:30,680 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:55:30,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-28 04:55:30,803 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:55:30,804 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:55:30,806 INFO L256 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-11-28 04:55:30,810 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:55:33,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1192 backedges. 111 proven. 120 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2024-11-28 04:55:33,328 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:55:33,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:55:33,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743334749] [2024-11-28 04:55:33,529 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:55:33,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416271353] [2024-11-28 04:55:33,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416271353] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:55:33,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:55:33,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-11-28 04:55:33,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845144822] [2024-11-28 04:55:33,530 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 04:55:33,530 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 04:55:33,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:55:33,531 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 04:55:33,531 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2024-11-28 04:55:33,531 INFO L87 Difference]: Start difference. First operand 3011 states and 3930 transitions. Second operand has 21 states, 20 states have (on average 2.3) internal successors, (46), 18 states have internal predecessors, (46), 10 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2024-11-28 04:55:36,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:55:36,821 INFO L93 Difference]: Finished difference Result 3076 states and 4001 transitions. [2024-11-28 04:55:36,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-28 04:55:36,821 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.3) internal successors, (46), 18 states have internal predecessors, (46), 10 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) Word has length 170 [2024-11-28 04:55:36,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:55:36,832 INFO L225 Difference]: With dead ends: 3076 [2024-11-28 04:55:36,832 INFO L226 Difference]: Without dead ends: 3072 [2024-11-28 04:55:36,833 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2024-11-28 04:55:36,833 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 58 mSDsluCounter, 958 mSDsCounter, 0 mSdLazyCounter, 1007 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 1025 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:55:36,834 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 1025 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1007 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-28 04:55:36,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3072 states. [2024-11-28 04:55:38,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3072 to 3018. [2024-11-28 04:55:38,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3018 states, 1918 states have (on average 1.1819603753910324) internal successors, (2267), 1933 states have internal predecessors, (2267), 834 states have call successors, (834), 266 states have call predecessors, (834), 265 states have return successors, (827), 818 states have call predecessors, (827), 827 states have call successors, (827) [2024-11-28 04:55:38,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3018 states to 3018 states and 3928 transitions. [2024-11-28 04:55:38,981 INFO L78 Accepts]: Start accepts. Automaton has 3018 states and 3928 transitions. Word has length 170 [2024-11-28 04:55:38,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:55:38,982 INFO L471 AbstractCegarLoop]: Abstraction has 3018 states and 3928 transitions. [2024-11-28 04:55:38,982 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.3) internal successors, (46), 18 states have internal predecessors, (46), 10 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2024-11-28 04:55:38,982 INFO L276 IsEmpty]: Start isEmpty. Operand 3018 states and 3928 transitions. [2024-11-28 04:55:38,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2024-11-28 04:55:38,985 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:55:38,985 INFO L218 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:55:38,994 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-28 04:55:39,189 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:55:39,189 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:55:39,190 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:55:39,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1454390613, now seen corresponding path program 11 times [2024-11-28 04:55:39,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:55:39,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696537445] [2024-11-28 04:55:39,192 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:55:39,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:55:39,238 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-11-28 04:55:39,238 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:55:39,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1425174390] [2024-11-28 04:55:39,240 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:55:39,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:55:39,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:55:39,246 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:55:39,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-28 04:55:39,844 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-11-28 04:55:39,844 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:55:39,847 INFO L256 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-28 04:55:39,849 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:55:41,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1203 backedges. 116 proven. 177 refuted. 0 times theorem prover too weak. 910 trivial. 0 not checked. [2024-11-28 04:55:41,094 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:55:41,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:55:41,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696537445] [2024-11-28 04:55:41,609 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:55:41,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425174390] [2024-11-28 04:55:41,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425174390] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:55:41,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:55:41,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-11-28 04:55:41,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147140941] [2024-11-28 04:55:41,609 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 04:55:41,610 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-28 04:55:41,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:55:41,610 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-28 04:55:41,610 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2024-11-28 04:55:41,610 INFO L87 Difference]: Start difference. First operand 3018 states and 3928 transitions. Second operand has 19 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 9 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 10 states have call predecessors, (27), 8 states have call successors, (27) [2024-11-28 04:55:45,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:55:45,353 INFO L93 Difference]: Finished difference Result 3099 states and 4027 transitions. [2024-11-28 04:55:45,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 04:55:45,353 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 9 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 10 states have call predecessors, (27), 8 states have call successors, (27) Word has length 174 [2024-11-28 04:55:45,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:55:45,363 INFO L225 Difference]: With dead ends: 3099 [2024-11-28 04:55:45,363 INFO L226 Difference]: Without dead ends: 3097 [2024-11-28 04:55:45,365 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2024-11-28 04:55:45,365 INFO L435 NwaCegarLoop]: 76 mSDtfsCounter, 50 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 996 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-28 04:55:45,365 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 996 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-28 04:55:45,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3097 states. [2024-11-28 04:55:47,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3097 to 3027. [2024-11-28 04:55:47,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3027 states, 1927 states have (on average 1.180591593149974) internal successors, (2275), 1942 states have internal predecessors, (2275), 830 states have call successors, (830), 270 states have call predecessors, (830), 269 states have return successors, (823), 814 states have call predecessors, (823), 823 states have call successors, (823) [2024-11-28 04:55:47,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3027 states to 3027 states and 3928 transitions. [2024-11-28 04:55:47,240 INFO L78 Accepts]: Start accepts. Automaton has 3027 states and 3928 transitions. Word has length 174 [2024-11-28 04:55:47,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:55:47,241 INFO L471 AbstractCegarLoop]: Abstraction has 3027 states and 3928 transitions. [2024-11-28 04:55:47,241 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 9 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 10 states have call predecessors, (27), 8 states have call successors, (27) [2024-11-28 04:55:47,241 INFO L276 IsEmpty]: Start isEmpty. Operand 3027 states and 3928 transitions. [2024-11-28 04:55:47,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2024-11-28 04:55:47,243 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:55:47,244 INFO L218 NwaCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:55:47,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-11-28 04:55:47,444 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-11-28 04:55:47,445 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:55:47,445 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:55:47,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1809200098, now seen corresponding path program 3 times [2024-11-28 04:55:47,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:55:47,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991055958] [2024-11-28 04:55:47,445 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:55:47,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:55:47,493 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-28 04:55:47,493 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:55:47,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1944543202] [2024-11-28 04:55:47,494 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:55:47,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:55:47,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:55:47,496 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:55:47,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-28 04:55:47,693 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-28 04:55:47,693 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:55:47,701 INFO L256 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-28 04:55:47,704 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:55:49,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 169 proven. 96 refuted. 0 times theorem prover too weak. 1026 trivial. 0 not checked. [2024-11-28 04:55:49,035 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:55:57,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:55:57,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991055958] [2024-11-28 04:55:57,993 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:55:57,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944543202] [2024-11-28 04:55:57,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944543202] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:55:57,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:55:57,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-11-28 04:55:57,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953950551] [2024-11-28 04:55:57,993 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 04:55:57,994 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 04:55:57,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:55:57,994 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 04:55:57,994 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=458, Unknown=2, NotChecked=0, Total=552 [2024-11-28 04:55:57,995 INFO L87 Difference]: Start difference. First operand 3027 states and 3928 transitions. Second operand has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-11-28 04:56:00,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:56:00,725 INFO L93 Difference]: Finished difference Result 3353 states and 4325 transitions. [2024-11-28 04:56:00,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 04:56:00,725 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 176 [2024-11-28 04:56:00,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:56:00,740 INFO L225 Difference]: With dead ends: 3353 [2024-11-28 04:56:00,740 INFO L226 Difference]: Without dead ends: 3323 [2024-11-28 04:56:00,742 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 207 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=158, Invalid=710, Unknown=2, NotChecked=0, Total=870 [2024-11-28 04:56:00,742 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 32 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 04:56:00,743 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 572 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 04:56:00,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3323 states. [2024-11-28 04:56:02,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3323 to 3269. [2024-11-28 04:56:02,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3269 states, 2074 states have (on average 1.174059787849566) internal successors, (2435), 2089 states have internal predecessors, (2435), 897 states have call successors, (897), 297 states have call predecessors, (897), 297 states have return successors, (891), 882 states have call predecessors, (891), 891 states have call successors, (891) [2024-11-28 04:56:02,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3269 states to 3269 states and 4223 transitions. [2024-11-28 04:56:02,959 INFO L78 Accepts]: Start accepts. Automaton has 3269 states and 4223 transitions. Word has length 176 [2024-11-28 04:56:02,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:56:02,959 INFO L471 AbstractCegarLoop]: Abstraction has 3269 states and 4223 transitions. [2024-11-28 04:56:02,960 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-11-28 04:56:02,960 INFO L276 IsEmpty]: Start isEmpty. Operand 3269 states and 4223 transitions. [2024-11-28 04:56:02,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2024-11-28 04:56:02,964 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:56:02,964 INFO L218 NwaCegarLoop]: trace histogram [28, 27, 27, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:56:02,976 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-28 04:56:03,168 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-11-28 04:56:03,168 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:56:03,169 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:56:03,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1994288853, now seen corresponding path program 12 times [2024-11-28 04:56:03,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:56:03,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296770909] [2024-11-28 04:56:03,169 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:56:03,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:56:03,218 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-11-28 04:56:03,218 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:56:03,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1204385088] [2024-11-28 04:56:03,220 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:56:03,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:56:03,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:56:03,222 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:56:03,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-28 04:56:03,472 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-28 04:56:03,472 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:56:03,474 INFO L256 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-11-28 04:56:03,479 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:56:07,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1633 backedges. 233 proven. 177 refuted. 0 times theorem prover too weak. 1223 trivial. 0 not checked. [2024-11-28 04:56:07,357 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:56:30,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:56:30,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296770909] [2024-11-28 04:56:30,883 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:56:30,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204385088] [2024-11-28 04:56:30,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204385088] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:56:30,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:56:30,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-11-28 04:56:30,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261685797] [2024-11-28 04:56:30,883 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 04:56:30,884 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-28 04:56:30,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:56:30,884 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-28 04:56:30,885 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=610, Unknown=1, NotChecked=0, Total=756 [2024-11-28 04:56:30,885 INFO L87 Difference]: Start difference. First operand 3269 states and 4223 transitions. Second operand has 19 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 15 states have internal predecessors, (44), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2024-11-28 04:56:35,764 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:56:39,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:56:43,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:56:56,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:56:56,744 INFO L93 Difference]: Finished difference Result 3526 states and 4541 transitions. [2024-11-28 04:56:56,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 04:56:56,745 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 15 states have internal predecessors, (44), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) Word has length 193 [2024-11-28 04:56:56,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:56:56,756 INFO L225 Difference]: With dead ends: 3526 [2024-11-28 04:56:56,756 INFO L226 Difference]: Without dead ends: 3522 [2024-11-28 04:56:56,758 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 27.3s TimeCoverageRelationStatistics Valid=197, Invalid=792, Unknown=3, NotChecked=0, Total=992 [2024-11-28 04:56:56,758 INFO L435 NwaCegarLoop]: 64 mSDtfsCounter, 35 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 10 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:56:56,758 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 562 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 628 Invalid, 3 Unknown, 0 Unchecked, 15.1s Time] [2024-11-28 04:56:56,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3522 states. [2024-11-28 04:56:59,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3522 to 3360. [2024-11-28 04:56:59,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3360 states, 2150 states have (on average 1.169767441860465) internal successors, (2515), 2171 states have internal predecessors, (2515), 902 states have call successors, (902), 308 states have call predecessors, (902), 307 states have return successors, (896), 880 states have call predecessors, (896), 896 states have call successors, (896) [2024-11-28 04:56:59,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3360 states to 3360 states and 4313 transitions. [2024-11-28 04:56:59,874 INFO L78 Accepts]: Start accepts. Automaton has 3360 states and 4313 transitions. Word has length 193 [2024-11-28 04:56:59,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:56:59,874 INFO L471 AbstractCegarLoop]: Abstraction has 3360 states and 4313 transitions. [2024-11-28 04:56:59,874 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 15 states have internal predecessors, (44), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2024-11-28 04:56:59,874 INFO L276 IsEmpty]: Start isEmpty. Operand 3360 states and 4313 transitions. [2024-11-28 04:56:59,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2024-11-28 04:56:59,880 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:56:59,880 INFO L218 NwaCegarLoop]: trace histogram [28, 27, 27, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:56:59,890 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-28 04:57:00,084 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-11-28 04:57:00,084 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:57:00,085 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:57:00,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1366857183, now seen corresponding path program 13 times [2024-11-28 04:57:00,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:57:00,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477809716] [2024-11-28 04:57:00,085 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:57:00,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:57:00,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 04:57:00,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [759734215] [2024-11-28 04:57:00,130 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:57:00,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:57:00,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:57:00,132 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:57:00,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-28 04:57:00,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:57:00,330 INFO L256 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 111 conjuncts are in the unsatisfiable core [2024-11-28 04:57:00,339 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:57:04,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1644 backedges. 316 proven. 239 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2024-11-28 04:57:04,102 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:57:06,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:57:06,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477809716] [2024-11-28 04:57:06,412 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:57:06,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759734215] [2024-11-28 04:57:06,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759734215] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:57:06,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:57:06,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2024-11-28 04:57:06,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117399274] [2024-11-28 04:57:06,412 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 04:57:06,412 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-28 04:57:06,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:57:06,413 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-28 04:57:06,413 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=912, Unknown=0, NotChecked=0, Total=1122 [2024-11-28 04:57:06,413 INFO L87 Difference]: Start difference. First operand 3360 states and 4313 transitions. Second operand has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 21 states have internal predecessors, (53), 12 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (31), 11 states have call predecessors, (31), 12 states have call successors, (31) [2024-11-28 04:57:10,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:57:10,887 INFO L93 Difference]: Finished difference Result 3472 states and 4433 transitions. [2024-11-28 04:57:10,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 04:57:10,887 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 21 states have internal predecessors, (53), 12 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (31), 11 states have call predecessors, (31), 12 states have call successors, (31) Word has length 197 [2024-11-28 04:57:10,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:57:10,901 INFO L225 Difference]: With dead ends: 3472 [2024-11-28 04:57:10,902 INFO L226 Difference]: Without dead ends: 3470 [2024-11-28 04:57:10,903 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 188 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=345, Invalid=1635, Unknown=0, NotChecked=0, Total=1980 [2024-11-28 04:57:10,904 INFO L435 NwaCegarLoop]: 69 mSDtfsCounter, 72 mSDsluCounter, 1095 mSDsCounter, 0 mSdLazyCounter, 1167 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 1164 SdHoareTripleChecker+Invalid, 1247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-28 04:57:10,905 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 1164 Invalid, 1247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1167 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-28 04:57:10,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3470 states. [2024-11-28 04:57:13,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3470 to 3445. [2024-11-28 04:57:13,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3445 states, 2206 states have (on average 1.1681776971894833) internal successors, (2577), 2226 states have internal predecessors, (2577), 915 states have call successors, (915), 324 states have call predecessors, (915), 323 states have return successors, (909), 894 states have call predecessors, (909), 909 states have call successors, (909) [2024-11-28 04:57:13,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3445 states to 3445 states and 4401 transitions. [2024-11-28 04:57:13,235 INFO L78 Accepts]: Start accepts. Automaton has 3445 states and 4401 transitions. Word has length 197 [2024-11-28 04:57:13,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:57:13,236 INFO L471 AbstractCegarLoop]: Abstraction has 3445 states and 4401 transitions. [2024-11-28 04:57:13,236 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 21 states have internal predecessors, (53), 12 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (31), 11 states have call predecessors, (31), 12 states have call successors, (31) [2024-11-28 04:57:13,236 INFO L276 IsEmpty]: Start isEmpty. Operand 3445 states and 4401 transitions. [2024-11-28 04:57:13,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2024-11-28 04:57:13,238 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:57:13,239 INFO L218 NwaCegarLoop]: trace histogram [28, 27, 27, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:57:13,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-11-28 04:57:13,439 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-28 04:57:13,439 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:57:13,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:57:13,440 INFO L85 PathProgramCache]: Analyzing trace with hash -625196519, now seen corresponding path program 14 times [2024-11-28 04:57:13,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:57:13,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890499381] [2024-11-28 04:57:13,440 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:57:13,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:57:13,475 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:57:13,475 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:57:13,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [845162086] [2024-11-28 04:57:13,477 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:57:13,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:57:13,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:57:13,479 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:57:13,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-28 04:57:13,628 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:57:13,628 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:57:13,632 INFO L256 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-11-28 04:57:13,636 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:57:15,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1644 backedges. 139 proven. 236 refuted. 0 times theorem prover too weak. 1269 trivial. 0 not checked. [2024-11-28 04:57:15,910 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:57:16,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:57:16,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890499381] [2024-11-28 04:57:16,128 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:57:16,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845162086] [2024-11-28 04:57:16,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845162086] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:57:16,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:57:16,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-11-28 04:57:16,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268749621] [2024-11-28 04:57:16,129 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 04:57:16,129 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 04:57:16,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:57:16,130 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 04:57:16,130 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2024-11-28 04:57:16,130 INFO L87 Difference]: Start difference. First operand 3445 states and 4401 transitions. Second operand has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 20 states have internal predecessors, (53), 10 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (31), 12 states have call predecessors, (31), 9 states have call successors, (31) [2024-11-28 04:57:20,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:57:20,516 INFO L93 Difference]: Finished difference Result 3529 states and 4499 transitions. [2024-11-28 04:57:20,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 04:57:20,516 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 20 states have internal predecessors, (53), 10 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (31), 12 states have call predecessors, (31), 9 states have call successors, (31) Word has length 197 [2024-11-28 04:57:20,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:57:20,528 INFO L225 Difference]: With dead ends: 3529 [2024-11-28 04:57:20,528 INFO L226 Difference]: Without dead ends: 3527 [2024-11-28 04:57:20,529 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=147, Invalid=1113, Unknown=0, NotChecked=0, Total=1260 [2024-11-28 04:57:20,530 INFO L435 NwaCegarLoop]: 74 mSDtfsCounter, 72 mSDsluCounter, 830 mSDsCounter, 0 mSdLazyCounter, 1180 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 904 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-28 04:57:20,530 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 904 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1180 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-28 04:57:20,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3527 states. [2024-11-28 04:57:23,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3527 to 3483. [2024-11-28 04:57:23,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3483 states, 2231 states have (on average 1.16674137158225) internal successors, (2603), 2251 states have internal predecessors, (2603), 923 states have call successors, (923), 329 states have call predecessors, (923), 328 states have return successors, (917), 902 states have call predecessors, (917), 917 states have call successors, (917) [2024-11-28 04:57:23,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3483 states to 3483 states and 4443 transitions. [2024-11-28 04:57:23,075 INFO L78 Accepts]: Start accepts. Automaton has 3483 states and 4443 transitions. Word has length 197 [2024-11-28 04:57:23,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:57:23,075 INFO L471 AbstractCegarLoop]: Abstraction has 3483 states and 4443 transitions. [2024-11-28 04:57:23,076 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 20 states have internal predecessors, (53), 10 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (31), 12 states have call predecessors, (31), 9 states have call successors, (31) [2024-11-28 04:57:23,076 INFO L276 IsEmpty]: Start isEmpty. Operand 3483 states and 4443 transitions. [2024-11-28 04:57:23,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2024-11-28 04:57:23,078 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:57:23,079 INFO L218 NwaCegarLoop]: trace histogram [28, 27, 27, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:57:23,089 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-28 04:57:23,279 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-28 04:57:23,279 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:57:23,279 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:57:23,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1454517265, now seen corresponding path program 15 times [2024-11-28 04:57:23,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:57:23,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310770331] [2024-11-28 04:57:23,280 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:57:23,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:57:23,339 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-28 04:57:23,339 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:57:23,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [171858589] [2024-11-28 04:57:23,341 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:57:23,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:57:23,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:57:23,345 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:57:23,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-28 04:57:23,584 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 04:57:23,584 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:57:23,587 INFO L256 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-28 04:57:23,590 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:57:24,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1644 backedges. 146 proven. 1 refuted. 0 times theorem prover too weak. 1497 trivial. 0 not checked. [2024-11-28 04:57:24,242 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:57:24,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1644 backedges. 140 proven. 7 refuted. 0 times theorem prover too weak. 1497 trivial. 0 not checked. [2024-11-28 04:57:24,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:57:24,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310770331] [2024-11-28 04:57:24,872 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:57:24,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171858589] [2024-11-28 04:57:24,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171858589] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:57:24,873 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:57:24,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2024-11-28 04:57:24,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497965253] [2024-11-28 04:57:24,873 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:57:24,873 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 04:57:24,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:57:24,874 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 04:57:24,874 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2024-11-28 04:57:24,874 INFO L87 Difference]: Start difference. First operand 3483 states and 4443 transitions. Second operand has 16 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 6 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 6 states have call predecessors, (16), 4 states have call successors, (16) [2024-11-28 04:57:27,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:57:27,312 INFO L93 Difference]: Finished difference Result 3501 states and 4460 transitions. [2024-11-28 04:57:27,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 04:57:27,312 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 6 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 6 states have call predecessors, (16), 4 states have call successors, (16) Word has length 197 [2024-11-28 04:57:27,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:57:27,323 INFO L225 Difference]: With dead ends: 3501 [2024-11-28 04:57:27,323 INFO L226 Difference]: Without dead ends: 3499 [2024-11-28 04:57:27,325 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 377 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2024-11-28 04:57:27,325 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 18 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:57:27,326 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 211 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:57:27,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3499 states. [2024-11-28 04:57:29,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3499 to 3499. [2024-11-28 04:57:29,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3499 states, 2243 states have (on average 1.1658493089612127) internal successors, (2615), 2263 states have internal predecessors, (2615), 923 states have call successors, (923), 333 states have call predecessors, (923), 332 states have return successors, (917), 902 states have call predecessors, (917), 917 states have call successors, (917) [2024-11-28 04:57:29,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3499 states to 3499 states and 4455 transitions. [2024-11-28 04:57:29,488 INFO L78 Accepts]: Start accepts. Automaton has 3499 states and 4455 transitions. Word has length 197 [2024-11-28 04:57:29,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:57:29,488 INFO L471 AbstractCegarLoop]: Abstraction has 3499 states and 4455 transitions. [2024-11-28 04:57:29,488 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 6 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 6 states have call predecessors, (16), 4 states have call successors, (16) [2024-11-28 04:57:29,488 INFO L276 IsEmpty]: Start isEmpty. Operand 3499 states and 4455 transitions. [2024-11-28 04:57:29,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2024-11-28 04:57:29,490 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:57:29,491 INFO L218 NwaCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:57:29,497 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-28 04:57:29,691 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:57:29,691 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:57:29,691 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:57:29,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1687487526, now seen corresponding path program 4 times [2024-11-28 04:57:29,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:57:29,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494444766] [2024-11-28 04:57:29,692 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:57:29,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:57:29,733 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:57:29,733 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:57:29,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2004070149] [2024-11-28 04:57:29,735 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:57:29,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:57:29,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:57:29,742 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:57:29,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-28 04:57:29,869 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:57:29,869 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:57:29,873 INFO L256 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-11-28 04:57:29,877 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:57:32,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1749 backedges. 133 proven. 170 refuted. 0 times theorem prover too weak. 1446 trivial. 0 not checked. [2024-11-28 04:57:32,688 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:57:34,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:57:34,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494444766] [2024-11-28 04:57:34,639 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:57:34,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004070149] [2024-11-28 04:57:34,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004070149] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:57:34,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:57:34,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-11-28 04:57:34,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751706839] [2024-11-28 04:57:34,640 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 04:57:34,640 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 04:57:34,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:57:34,641 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 04:57:34,641 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2024-11-28 04:57:34,641 INFO L87 Difference]: Start difference. First operand 3499 states and 4455 transitions. Second operand has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 19 states have internal predecessors, (50), 12 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (32), 10 states have call predecessors, (32), 11 states have call successors, (32) [2024-11-28 04:57:38,784 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-28 04:57:41,917 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-28 04:57:43,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:57:43,736 INFO L93 Difference]: Finished difference Result 3581 states and 4542 transitions. [2024-11-28 04:57:43,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 04:57:43,737 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 19 states have internal predecessors, (50), 12 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (32), 10 states have call predecessors, (32), 11 states have call successors, (32) Word has length 199 [2024-11-28 04:57:43,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:57:43,744 INFO L225 Difference]: With dead ends: 3581 [2024-11-28 04:57:43,744 INFO L226 Difference]: Without dead ends: 3576 [2024-11-28 04:57:43,745 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=165, Invalid=1395, Unknown=0, NotChecked=0, Total=1560 [2024-11-28 04:57:43,745 INFO L435 NwaCegarLoop]: 73 mSDtfsCounter, 67 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 1321 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 798 SdHoareTripleChecker+Invalid, 1365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:57:43,745 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 798 Invalid, 1365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1321 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2024-11-28 04:57:43,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3576 states. [2024-11-28 04:57:45,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3576 to 3540. [2024-11-28 04:57:45,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3540 states, 2274 states have (on average 1.1631486367634125) internal successors, (2645), 2294 states have internal predecessors, (2645), 922 states have call successors, (922), 343 states have call predecessors, (922), 343 states have return successors, (917), 902 states have call predecessors, (917), 917 states have call successors, (917) [2024-11-28 04:57:45,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3540 states to 3540 states and 4484 transitions. [2024-11-28 04:57:45,881 INFO L78 Accepts]: Start accepts. Automaton has 3540 states and 4484 transitions. Word has length 199 [2024-11-28 04:57:45,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:57:45,881 INFO L471 AbstractCegarLoop]: Abstraction has 3540 states and 4484 transitions. [2024-11-28 04:57:45,881 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 19 states have internal predecessors, (50), 12 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (32), 10 states have call predecessors, (32), 11 states have call successors, (32) [2024-11-28 04:57:45,881 INFO L276 IsEmpty]: Start isEmpty. Operand 3540 states and 4484 transitions. [2024-11-28 04:57:45,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2024-11-28 04:57:45,883 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:57:45,883 INFO L218 NwaCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:57:45,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-11-28 04:57:46,084 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-28 04:57:46,084 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:57:46,084 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:57:46,084 INFO L85 PathProgramCache]: Analyzing trace with hash 164659998, now seen corresponding path program 5 times [2024-11-28 04:57:46,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:57:46,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442518578] [2024-11-28 04:57:46,085 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:57:46,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:57:46,117 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-28 04:57:46,118 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:57:46,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [681386569] [2024-11-28 04:57:46,119 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:57:46,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:57:46,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:57:46,122 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:57:46,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-28 04:57:46,686 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-28 04:57:46,686 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:57:46,690 INFO L256 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-28 04:57:46,694 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:57:51,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1760 backedges. 123 proven. 257 refuted. 0 times theorem prover too weak. 1380 trivial. 0 not checked. [2024-11-28 04:57:51,542 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:57:53,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:57:53,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442518578] [2024-11-28 04:57:53,072 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:57:53,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681386569] [2024-11-28 04:57:53,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681386569] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:57:53,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:57:53,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-11-28 04:57:53,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49793483] [2024-11-28 04:57:53,073 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 04:57:53,073 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 04:57:53,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:57:53,074 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 04:57:53,074 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2024-11-28 04:57:53,074 INFO L87 Difference]: Start difference. First operand 3540 states and 4484 transitions. Second operand has 21 states, 20 states have (on average 2.55) internal successors, (51), 18 states have internal predecessors, (51), 12 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (32), 11 states have call predecessors, (32), 11 states have call successors, (32) [2024-11-28 04:58:05,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:58:05,272 INFO L93 Difference]: Finished difference Result 3591 states and 4553 transitions. [2024-11-28 04:58:05,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-28 04:58:05,272 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.55) internal successors, (51), 18 states have internal predecessors, (51), 12 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (32), 11 states have call predecessors, (32), 11 states have call successors, (32) Word has length 203 [2024-11-28 04:58:05,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:58:05,279 INFO L225 Difference]: With dead ends: 3591 [2024-11-28 04:58:05,279 INFO L226 Difference]: Without dead ends: 3584 [2024-11-28 04:58:05,281 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=154, Invalid=1328, Unknown=0, NotChecked=0, Total=1482 [2024-11-28 04:58:05,281 INFO L435 NwaCegarLoop]: 82 mSDtfsCounter, 56 mSDsluCounter, 1122 mSDsCounter, 0 mSdLazyCounter, 1102 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1204 SdHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2024-11-28 04:58:05,281 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 1204 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1102 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2024-11-28 04:58:05,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3584 states. [2024-11-28 04:58:07,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3584 to 3540. [2024-11-28 04:58:07,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3540 states, 2273 states have (on average 1.1627804663440386) internal successors, (2643), 2293 states have internal predecessors, (2643), 922 states have call successors, (922), 344 states have call predecessors, (922), 344 states have return successors, (917), 902 states have call predecessors, (917), 917 states have call successors, (917) [2024-11-28 04:58:07,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3540 states to 3540 states and 4482 transitions. [2024-11-28 04:58:07,455 INFO L78 Accepts]: Start accepts. Automaton has 3540 states and 4482 transitions. Word has length 203 [2024-11-28 04:58:07,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:58:07,456 INFO L471 AbstractCegarLoop]: Abstraction has 3540 states and 4482 transitions. [2024-11-28 04:58:07,456 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.55) internal successors, (51), 18 states have internal predecessors, (51), 12 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (32), 11 states have call predecessors, (32), 11 states have call successors, (32) [2024-11-28 04:58:07,456 INFO L276 IsEmpty]: Start isEmpty. Operand 3540 states and 4482 transitions. [2024-11-28 04:58:07,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2024-11-28 04:58:07,459 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:58:07,459 INFO L218 NwaCegarLoop]: trace histogram [31, 30, 30, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 5, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:58:07,464 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-28 04:58:07,659 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-28 04:58:07,659 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:58:07,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:58:07,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1372565351, now seen corresponding path program 16 times [2024-11-28 04:58:07,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:58:07,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021305078] [2024-11-28 04:58:07,660 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:58:07,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:58:07,699 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:58:07,699 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:58:07,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2107878066] [2024-11-28 04:58:07,701 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:58:07,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:58:07,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:58:07,703 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:58:07,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-28 04:58:07,842 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:58:07,842 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:58:07,845 INFO L256 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 77 conjuncts are in the unsatisfiable core [2024-11-28 04:58:07,850 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:58:09,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 137 proven. 211 refuted. 0 times theorem prover too weak. 1668 trivial. 0 not checked. [2024-11-28 04:58:09,761 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:58:13,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 155 proven. 184 refuted. 0 times theorem prover too weak. 1677 trivial. 0 not checked. [2024-11-28 04:58:13,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:58:13,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021305078] [2024-11-28 04:58:13,553 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:58:13,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107878066] [2024-11-28 04:58:13,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107878066] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:58:13,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:58:13,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 36 [2024-11-28 04:58:13,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497715136] [2024-11-28 04:58:13,554 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:58:13,554 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-28 04:58:13,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:58:13,554 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-28 04:58:13,555 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1038, Unknown=0, NotChecked=0, Total=1260 [2024-11-28 04:58:13,555 INFO L87 Difference]: Start difference. First operand 3540 states and 4482 transitions. Second operand has 36 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 33 states have internal predecessors, (91), 21 states have call successors, (69), 3 states have call predecessors, (69), 3 states have return successors, (68), 21 states have call predecessors, (68), 21 states have call successors, (68) [2024-11-28 04:58:27,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:58:27,437 INFO L93 Difference]: Finished difference Result 3897 states and 5046 transitions. [2024-11-28 04:58:27,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-28 04:58:27,438 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 33 states have internal predecessors, (91), 21 states have call successors, (69), 3 states have call predecessors, (69), 3 states have return successors, (68), 21 states have call predecessors, (68), 21 states have call successors, (68) Word has length 211 [2024-11-28 04:58:27,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:58:27,448 INFO L225 Difference]: With dead ends: 3897 [2024-11-28 04:58:27,448 INFO L226 Difference]: Without dead ends: 3893 [2024-11-28 04:58:27,451 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 843 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=942, Invalid=3750, Unknown=0, NotChecked=0, Total=4692 [2024-11-28 04:58:27,451 INFO L435 NwaCegarLoop]: 94 mSDtfsCounter, 175 mSDsluCounter, 1747 mSDsCounter, 0 mSdLazyCounter, 1847 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 1841 SdHoareTripleChecker+Invalid, 2041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 1847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2024-11-28 04:58:27,451 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 1841 Invalid, 2041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 1847 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2024-11-28 04:58:27,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3893 states. [2024-11-28 04:58:30,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3893 to 3767. [2024-11-28 04:58:30,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3767 states, 2398 states have (on average 1.1801501251042537) internal successors, (2830), 2415 states have internal predecessors, (2830), 1024 states have call successors, (1024), 345 states have call predecessors, (1024), 344 states have return successors, (1019), 1006 states have call predecessors, (1019), 1019 states have call successors, (1019) [2024-11-28 04:58:30,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3767 states to 3767 states and 4873 transitions. [2024-11-28 04:58:30,267 INFO L78 Accepts]: Start accepts. Automaton has 3767 states and 4873 transitions. Word has length 211 [2024-11-28 04:58:30,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:58:30,268 INFO L471 AbstractCegarLoop]: Abstraction has 3767 states and 4873 transitions. [2024-11-28 04:58:30,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 33 states have internal predecessors, (91), 21 states have call successors, (69), 3 states have call predecessors, (69), 3 states have return successors, (68), 21 states have call predecessors, (68), 21 states have call successors, (68) [2024-11-28 04:58:30,268 INFO L276 IsEmpty]: Start isEmpty. Operand 3767 states and 4873 transitions. [2024-11-28 04:58:30,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2024-11-28 04:58:30,270 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:58:30,270 INFO L218 NwaCegarLoop]: trace histogram [31, 30, 30, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:58:30,276 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-11-28 04:58:30,471 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-28 04:58:30,471 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:58:30,471 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:58:30,471 INFO L85 PathProgramCache]: Analyzing trace with hash -927292509, now seen corresponding path program 17 times [2024-11-28 04:58:30,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:58:30,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357057811] [2024-11-28 04:58:30,471 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:58:30,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:58:30,506 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-28 04:58:30,506 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:58:30,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [649695317] [2024-11-28 04:58:30,508 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:58:30,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:58:30,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:58:30,511 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:58:30,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-28 04:58:30,740 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-28 04:58:30,740 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:58:30,748 INFO L256 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-11-28 04:58:30,752 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:58:54,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2027 backedges. 151 proven. 280 refuted. 0 times theorem prover too weak. 1596 trivial. 0 not checked. [2024-11-28 04:58:54,170 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:58:54,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:58:54,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357057811] [2024-11-28 04:58:54,954 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:58:54,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649695317] [2024-11-28 04:58:54,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649695317] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:58:54,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:58:54,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-11-28 04:58:54,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745176583] [2024-11-28 04:58:54,954 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 04:58:54,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 04:58:54,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:58:54,955 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 04:58:54,956 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2024-11-28 04:58:54,956 INFO L87 Difference]: Start difference. First operand 3767 states and 4873 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 18 states have internal predecessors, (53), 12 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (34), 12 states have call predecessors, (34), 12 states have call successors, (34) [2024-11-28 04:59:01,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:59:07,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:59:13,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:59:15,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:59:15,225 INFO L93 Difference]: Finished difference Result 3865 states and 4989 transitions. [2024-11-28 04:59:15,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-28 04:59:15,225 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 18 states have internal predecessors, (53), 12 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (34), 12 states have call predecessors, (34), 12 states have call successors, (34) Word has length 215 [2024-11-28 04:59:15,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:59:15,233 INFO L225 Difference]: With dead ends: 3865 [2024-11-28 04:59:15,233 INFO L226 Difference]: Without dead ends: 3861 [2024-11-28 04:59:15,234 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=158, Invalid=1324, Unknown=0, NotChecked=0, Total=1482 [2024-11-28 04:59:15,234 INFO L435 NwaCegarLoop]: 83 mSDtfsCounter, 54 mSDsluCounter, 1310 mSDsCounter, 0 mSdLazyCounter, 1198 mSolverCounterSat, 46 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 1393 SdHoareTripleChecker+Invalid, 1246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1198 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.5s IncrementalHoareTripleChecker+Time [2024-11-28 04:59:15,235 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 1393 Invalid, 1246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1198 Invalid, 2 Unknown, 0 Unchecked, 15.5s Time] [2024-11-28 04:59:15,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3861 states. [2024-11-28 04:59:18,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3861 to 3821. [2024-11-28 04:59:18,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3821 states, 2432 states have (on average 1.1792763157894737) internal successors, (2868), 2447 states have internal predecessors, (2868), 1036 states have call successors, (1036), 353 states have call predecessors, (1036), 352 states have return successors, (1032), 1020 states have call predecessors, (1032), 1032 states have call successors, (1032) [2024-11-28 04:59:18,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3821 states to 3821 states and 4936 transitions. [2024-11-28 04:59:18,073 INFO L78 Accepts]: Start accepts. Automaton has 3821 states and 4936 transitions. Word has length 215 [2024-11-28 04:59:18,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:59:18,074 INFO L471 AbstractCegarLoop]: Abstraction has 3821 states and 4936 transitions. [2024-11-28 04:59:18,074 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 18 states have internal predecessors, (53), 12 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (34), 12 states have call predecessors, (34), 12 states have call successors, (34) [2024-11-28 04:59:18,074 INFO L276 IsEmpty]: Start isEmpty. Operand 3821 states and 4936 transitions. [2024-11-28 04:59:18,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2024-11-28 04:59:18,078 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:59:18,078 INFO L218 NwaCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:59:18,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-11-28 04:59:18,279 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-28 04:59:18,279 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:59:18,279 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:59:18,279 INFO L85 PathProgramCache]: Analyzing trace with hash 2041908630, now seen corresponding path program 6 times [2024-11-28 04:59:18,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:59:18,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144530464] [2024-11-28 04:59:18,280 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:59:18,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:59:18,313 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2024-11-28 04:59:18,313 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:59:18,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1486621969] [2024-11-28 04:59:18,315 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:59:18,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:59:18,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:59:18,319 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:59:18,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-28 04:59:18,521 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-11-28 04:59:18,521 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:59:18,524 INFO L256 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-11-28 04:59:18,528 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:59:20,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 212 proven. 202 refuted. 0 times theorem prover too weak. 1864 trivial. 0 not checked. [2024-11-28 04:59:20,795 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:59:29,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:59:29,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144530464] [2024-11-28 04:59:29,654 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:59:29,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486621969] [2024-11-28 04:59:29,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486621969] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:59:29,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:59:29,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-11-28 04:59:29,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019209248] [2024-11-28 04:59:29,654 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 04:59:29,655 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-28 04:59:29,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:59:29,655 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-28 04:59:29,655 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=647, Unknown=2, NotChecked=0, Total=756 [2024-11-28 04:59:29,656 INFO L87 Difference]: Start difference. First operand 3821 states and 4936 transitions. Second operand has 19 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 15 states have internal predecessors, (42), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2024-11-28 04:59:33,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:59:33,647 INFO L93 Difference]: Finished difference Result 3924 states and 5022 transitions. [2024-11-28 04:59:33,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 04:59:33,647 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 15 states have internal predecessors, (42), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) Word has length 222 [2024-11-28 04:59:33,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:59:33,656 INFO L225 Difference]: With dead ends: 3924 [2024-11-28 04:59:33,656 INFO L226 Difference]: Without dead ends: 3917 [2024-11-28 04:59:33,657 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=145, Invalid=783, Unknown=2, NotChecked=0, Total=930 [2024-11-28 04:59:33,657 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 39 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 04:59:33,657 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 559 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 04:59:33,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3917 states. [2024-11-28 04:59:36,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3917 to 3779. [2024-11-28 04:59:36,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3779 states, 2408 states have (on average 1.1756644518272426) internal successors, (2831), 2418 states have internal predecessors, (2831), 1005 states have call successors, (1005), 366 states have call predecessors, (1005), 365 states have return successors, (1001), 994 states have call predecessors, (1001), 1001 states have call successors, (1001) [2024-11-28 04:59:36,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3779 states to 3779 states and 4837 transitions. [2024-11-28 04:59:36,763 INFO L78 Accepts]: Start accepts. Automaton has 3779 states and 4837 transitions. Word has length 222 [2024-11-28 04:59:36,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:59:36,764 INFO L471 AbstractCegarLoop]: Abstraction has 3779 states and 4837 transitions. [2024-11-28 04:59:36,764 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 15 states have internal predecessors, (42), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2024-11-28 04:59:36,764 INFO L276 IsEmpty]: Start isEmpty. Operand 3779 states and 4837 transitions. [2024-11-28 04:59:36,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2024-11-28 04:59:36,766 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:59:36,766 INFO L218 NwaCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:59:36,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-11-28 04:59:36,967 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2024-11-28 04:59:36,967 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:59:36,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:59:36,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1819384274, now seen corresponding path program 7 times [2024-11-28 04:59:36,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:59:36,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265476747] [2024-11-28 04:59:36,968 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:59:36,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:59:36,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 04:59:36,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1975050141] [2024-11-28 04:59:36,996 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:59:36,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:59:36,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:59:36,999 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:59:37,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-28 04:59:37,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:59:37,164 INFO L256 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 93 conjuncts are in the unsatisfiable core [2024-11-28 04:59:37,168 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:59:39,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2289 backedges. 179 proven. 291 refuted. 0 times theorem prover too weak. 1819 trivial. 0 not checked. [2024-11-28 04:59:39,479 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:59:46,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:59:46,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265476747] [2024-11-28 04:59:46,559 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:59:46,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975050141] [2024-11-28 04:59:46,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975050141] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:59:46,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:59:46,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-11-28 04:59:46,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468582810] [2024-11-28 04:59:46,560 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 04:59:46,560 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 04:59:46,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:59:46,561 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 04:59:46,561 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1111, Unknown=1, NotChecked=0, Total=1260 [2024-11-28 04:59:46,561 INFO L87 Difference]: Start difference. First operand 3779 states and 4837 transitions. Second operand has 24 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 13 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (36), 11 states have call predecessors, (36), 12 states have call successors, (36) [2024-11-28 04:59:51,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:59:51,464 INFO L93 Difference]: Finished difference Result 3856 states and 4949 transitions. [2024-11-28 04:59:51,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 04:59:51,464 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 13 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (36), 11 states have call predecessors, (36), 12 states have call successors, (36) Word has length 226 [2024-11-28 04:59:51,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:59:51,472 INFO L225 Difference]: With dead ends: 3856 [2024-11-28 04:59:51,472 INFO L226 Difference]: Without dead ends: 3851 [2024-11-28 04:59:51,473 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=268, Invalid=1893, Unknown=1, NotChecked=0, Total=2162 [2024-11-28 04:59:51,473 INFO L435 NwaCegarLoop]: 82 mSDtfsCounter, 77 mSDsluCounter, 1209 mSDsCounter, 0 mSdLazyCounter, 1458 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 1291 SdHoareTripleChecker+Invalid, 1528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:59:51,474 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 1291 Invalid, 1528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1458 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-28 04:59:51,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3851 states. [2024-11-28 04:59:54,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3851 to 3775. [2024-11-28 04:59:54,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3775 states, 2404 states have (on average 1.175540765391015) internal successors, (2826), 2414 states have internal predecessors, (2826), 1005 states have call successors, (1005), 366 states have call predecessors, (1005), 365 states have return successors, (1001), 994 states have call predecessors, (1001), 1001 states have call successors, (1001) [2024-11-28 04:59:54,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3775 states to 3775 states and 4832 transitions. [2024-11-28 04:59:54,295 INFO L78 Accepts]: Start accepts. Automaton has 3775 states and 4832 transitions. Word has length 226 [2024-11-28 04:59:54,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:59:54,296 INFO L471 AbstractCegarLoop]: Abstraction has 3775 states and 4832 transitions. [2024-11-28 04:59:54,296 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 13 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (36), 11 states have call predecessors, (36), 12 states have call successors, (36) [2024-11-28 04:59:54,296 INFO L276 IsEmpty]: Start isEmpty. Operand 3775 states and 4832 transitions. [2024-11-28 04:59:54,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2024-11-28 04:59:54,300 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:59:54,301 INFO L218 NwaCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:59:54,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2024-11-28 04:59:54,501 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2024-11-28 04:59:54,502 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:59:54,502 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:59:54,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1210475738, now seen corresponding path program 8 times [2024-11-28 04:59:54,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:59:54,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578468272] [2024-11-28 04:59:54,502 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:59:54,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:59:54,528 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:59:54,528 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:59:54,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [36414291] [2024-11-28 04:59:54,530 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:59:54,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:59:54,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:59:54,532 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:59:54,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-28 04:59:54,671 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:59:54,671 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:59:54,674 INFO L256 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 88 conjuncts are in the unsatisfiable core [2024-11-28 04:59:54,678 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:59:56,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2289 backedges. 153 proven. 230 refuted. 0 times theorem prover too weak. 1906 trivial. 0 not checked. [2024-11-28 04:59:56,732 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:59:57,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:59:57,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578468272] [2024-11-28 04:59:57,154 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:59:57,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36414291] [2024-11-28 04:59:57,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36414291] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:59:57,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:59:57,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-11-28 04:59:57,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024089679] [2024-11-28 04:59:57,154 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 04:59:57,155 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 04:59:57,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:59:57,156 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 04:59:57,156 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2024-11-28 04:59:57,156 INFO L87 Difference]: Start difference. First operand 3775 states and 4832 transitions. Second operand has 24 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 21 states have internal predecessors, (57), 13 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (36), 11 states have call predecessors, (36), 12 states have call successors, (36) [2024-11-28 05:00:02,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:00:02,117 INFO L93 Difference]: Finished difference Result 3875 states and 4948 transitions. [2024-11-28 05:00:02,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 05:00:02,118 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 21 states have internal predecessors, (57), 13 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (36), 11 states have call predecessors, (36), 12 states have call successors, (36) Word has length 226 [2024-11-28 05:00:02,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:00:02,125 INFO L225 Difference]: With dead ends: 3875 [2024-11-28 05:00:02,125 INFO L226 Difference]: Without dead ends: 3870 [2024-11-28 05:00:02,127 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=191, Invalid=1449, Unknown=0, NotChecked=0, Total=1640 [2024-11-28 05:00:02,127 INFO L435 NwaCegarLoop]: 80 mSDtfsCounter, 80 mSDsluCounter, 1325 mSDsCounter, 0 mSdLazyCounter, 1549 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 1405 SdHoareTripleChecker+Invalid, 1605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-28 05:00:02,127 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 1405 Invalid, 1605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1549 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-28 05:00:02,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3870 states. [2024-11-28 05:00:05,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3870 to 3858. [2024-11-28 05:00:05,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3858 states, 2456 states have (on average 1.174674267100977) internal successors, (2885), 2466 states have internal predecessors, (2885), 1025 states have call successors, (1025), 377 states have call predecessors, (1025), 376 states have return successors, (1021), 1014 states have call predecessors, (1021), 1021 states have call successors, (1021) [2024-11-28 05:00:05,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3858 states to 3858 states and 4931 transitions. [2024-11-28 05:00:05,101 INFO L78 Accepts]: Start accepts. Automaton has 3858 states and 4931 transitions. Word has length 226 [2024-11-28 05:00:05,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:00:05,101 INFO L471 AbstractCegarLoop]: Abstraction has 3858 states and 4931 transitions. [2024-11-28 05:00:05,101 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 21 states have internal predecessors, (57), 13 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (36), 11 states have call predecessors, (36), 12 states have call successors, (36) [2024-11-28 05:00:05,101 INFO L276 IsEmpty]: Start isEmpty. Operand 3858 states and 4931 transitions. [2024-11-28 05:00:05,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2024-11-28 05:00:05,105 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:00:05,105 INFO L218 NwaCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:00:05,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-11-28 05:00:05,305 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:00:05,305 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:00:05,305 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:00:05,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1144300062, now seen corresponding path program 9 times [2024-11-28 05:00:05,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:00:05,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996763919] [2024-11-28 05:00:05,306 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:00:05,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:00:05,350 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-28 05:00:05,350 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 05:00:05,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [99215166] [2024-11-28 05:00:05,352 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:00:05,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:00:05,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:00:05,354 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:00:05,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-28 05:00:05,531 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-28 05:00:05,532 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:00:05,534 INFO L256 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 90 conjuncts are in the unsatisfiable core [2024-11-28 05:00:05,537 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:00:07,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2289 backedges. 245 proven. 200 refuted. 0 times theorem prover too weak. 1844 trivial. 0 not checked. [2024-11-28 05:00:07,921 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:00:17,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:00:17,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996763919] [2024-11-28 05:00:17,756 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:00:17,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99215166] [2024-11-28 05:00:17,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99215166] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:00:17,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 05:00:17,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-11-28 05:00:17,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774262518] [2024-11-28 05:00:17,757 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 05:00:17,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 05:00:17,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:00:17,757 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 05:00:17,757 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=853, Unknown=2, NotChecked=0, Total=992 [2024-11-28 05:00:17,758 INFO L87 Difference]: Start difference. First operand 3858 states and 4931 transitions. Second operand has 22 states, 20 states have (on average 2.5) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 8 states have call predecessors, (24), 10 states have call successors, (24) [2024-11-28 05:00:24,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:00:24,705 INFO L93 Difference]: Finished difference Result 4434 states and 5704 transitions. [2024-11-28 05:00:24,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-28 05:00:24,707 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.5) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 8 states have call predecessors, (24), 10 states have call successors, (24) Word has length 226 [2024-11-28 05:00:24,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:00:24,717 INFO L225 Difference]: With dead ends: 4434 [2024-11-28 05:00:24,718 INFO L226 Difference]: Without dead ends: 4427 [2024-11-28 05:00:24,719 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=218, Invalid=1262, Unknown=2, NotChecked=0, Total=1482 [2024-11-28 05:00:24,719 INFO L435 NwaCegarLoop]: 77 mSDtfsCounter, 56 mSDsluCounter, 983 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 1060 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-11-28 05:00:24,719 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 1060 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 949 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-11-28 05:00:24,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4427 states. [2024-11-28 05:00:28,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4427 to 4284. [2024-11-28 05:00:28,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4284 states, 2726 states have (on average 1.1753484959647835) internal successors, (3204), 2733 states have internal predecessors, (3204), 1152 states have call successors, (1152), 405 states have call predecessors, (1152), 405 states have return successors, (1149), 1145 states have call predecessors, (1149), 1149 states have call successors, (1149) [2024-11-28 05:00:28,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4284 states to 4284 states and 5505 transitions. [2024-11-28 05:00:28,124 INFO L78 Accepts]: Start accepts. Automaton has 4284 states and 5505 transitions. Word has length 226 [2024-11-28 05:00:28,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:00:28,125 INFO L471 AbstractCegarLoop]: Abstraction has 4284 states and 5505 transitions. [2024-11-28 05:00:28,125 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.5) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 8 states have call predecessors, (24), 10 states have call successors, (24) [2024-11-28 05:00:28,125 INFO L276 IsEmpty]: Start isEmpty. Operand 4284 states and 5505 transitions. [2024-11-28 05:00:28,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2024-11-28 05:00:28,129 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:00:28,129 INFO L218 NwaCegarLoop]: trace histogram [35, 34, 34, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 5, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:00:28,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2024-11-28 05:00:28,329 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:00:28,330 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:00:28,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:00:28,330 INFO L85 PathProgramCache]: Analyzing trace with hash -355263377, now seen corresponding path program 18 times [2024-11-28 05:00:28,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:00:28,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011552510] [2024-11-28 05:00:28,330 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:00:28,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:00:28,373 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-11-28 05:00:28,374 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 05:00:28,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1853779868] [2024-11-28 05:00:28,376 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:00:28,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:00:28,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:00:28,378 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:00:28,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-28 05:00:29,112 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-28 05:00:29,112 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:00:29,114 INFO L256 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-11-28 05:00:29,118 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:00:31,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2593 backedges. 399 proven. 248 refuted. 0 times theorem prover too weak. 1946 trivial. 0 not checked. [2024-11-28 05:00:31,769 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:00:36,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:00:36,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011552510] [2024-11-28 05:00:36,419 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:00:36,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853779868] [2024-11-28 05:00:36,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853779868] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:00:36,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 05:00:36,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-11-28 05:00:36,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438608363] [2024-11-28 05:00:36,420 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 05:00:36,420 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 05:00:36,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:00:36,420 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 05:00:36,421 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=596, Unknown=1, NotChecked=0, Total=702 [2024-11-28 05:00:36,421 INFO L87 Difference]: Start difference. First operand 4284 states and 5505 transitions. Second operand has 20 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 16 states have internal predecessors, (46), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) [2024-11-28 05:00:41,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 05:00:49,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 05:00:53,207 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 05:00:57,238 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 05:01:01,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 05:01:04,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.50s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 05:01:13,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 05:01:17,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 05:01:29,557 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 05:01:42,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 05:01:46,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 05:01:50,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 05:01:58,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 05:02:03,028 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 05:02:07,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 05:02:17,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 05:02:22,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 05:02:26,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 05:02:30,701 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.36s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 05:02:51,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.10s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 05:02:55,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 05:02:59,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 05:03:03,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 05:03:07,965 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.21s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 05:03:12,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 05:03:16,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 05:03:38,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 05:03:44,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 05:04:09,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 05:04:28,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 05:04:33,056 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 05:04:37,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 05:04:41,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.21s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 05:04:45,898 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 05:05:25,234 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 05:05:30,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 05:05:34,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 05:05:51,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 05:05:57,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 05:06:01,163 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.10s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 05:06:05,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 05:06:09,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 05:06:13,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 05:06:17,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 05:06:21,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 05:06:26,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.10s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 05:06:30,835 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.19s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 05:06:34,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:06:34,355 INFO L93 Difference]: Finished difference Result 4603 states and 5962 transitions. [2024-11-28 05:06:34,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-28 05:06:34,355 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 16 states have internal predecessors, (46), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) Word has length 238 [2024-11-28 05:06:34,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:06:34,366 INFO L225 Difference]: With dead ends: 4603 [2024-11-28 05:06:34,366 INFO L226 Difference]: Without dead ends: 4599 [2024-11-28 05:06:34,368 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 161.0s TimeCoverageRelationStatistics Valid=366, Invalid=1490, Unknown=36, NotChecked=0, Total=1892 [2024-11-28 05:06:34,368 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 53 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 37 mSolverCounterUnsat, 47 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 195.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 47 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 197.9s IncrementalHoareTripleChecker+Time [2024-11-28 05:06:34,368 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 531 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 709 Invalid, 47 Unknown, 0 Unchecked, 197.9s Time] [2024-11-28 05:06:34,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4599 states. [2024-11-28 05:06:38,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4599 to 4462. [2024-11-28 05:06:38,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4462 states, 2831 states have (on average 1.1787354291769692) internal successors, (3337), 2845 states have internal predecessors, (3337), 1208 states have call successors, (1208), 423 states have call predecessors, (1208), 422 states have return successors, (1205), 1193 states have call predecessors, (1205), 1205 states have call successors, (1205) [2024-11-28 05:06:38,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4462 states to 4462 states and 5750 transitions. [2024-11-28 05:06:38,671 INFO L78 Accepts]: Start accepts. Automaton has 4462 states and 5750 transitions. Word has length 238 [2024-11-28 05:06:38,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:06:38,671 INFO L471 AbstractCegarLoop]: Abstraction has 4462 states and 5750 transitions. [2024-11-28 05:06:38,671 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 16 states have internal predecessors, (46), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) [2024-11-28 05:06:38,671 INFO L276 IsEmpty]: Start isEmpty. Operand 4462 states and 5750 transitions. [2024-11-28 05:06:38,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2024-11-28 05:06:38,677 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:06:38,677 INFO L218 NwaCegarLoop]: trace histogram [37, 36, 36, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:06:38,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2024-11-28 05:06:38,878 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-11-28 05:06:38,878 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:06:38,878 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:06:38,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1311999126, now seen corresponding path program 10 times [2024-11-28 05:06:38,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:06:38,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908734935] [2024-11-28 05:06:38,879 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:06:38,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:06:38,923 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:06:38,923 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 05:06:38,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1085360363] [2024-11-28 05:06:38,926 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:06:38,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:06:38,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:06:38,928 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:06:38,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-28 05:06:39,139 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:06:39,139 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:06:39,143 INFO L256 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-11-28 05:06:39,149 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:06:51,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2889 backedges. 211 proven. 347 refuted. 0 times theorem prover too weak. 2331 trivial. 0 not checked. [2024-11-28 05:06:51,473 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:06:55,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:06:55,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908734935] [2024-11-28 05:06:55,440 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:06:55,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085360363] [2024-11-28 05:06:55,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085360363] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:06:55,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 05:06:55,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2024-11-28 05:06:55,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333382824] [2024-11-28 05:06:55,440 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 05:06:55,441 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-28 05:06:55,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:06:55,441 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-28 05:06:55,442 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=899, Unknown=0, NotChecked=0, Total=992 [2024-11-28 05:06:55,442 INFO L87 Difference]: Start difference. First operand 4462 states and 5750 transitions. Second operand has 26 states, 25 states have (on average 2.4) internal successors, (60), 23 states have internal predecessors, (60), 15 states have call successors, (41), 2 states have call predecessors, (41), 3 states have return successors, (40), 13 states have call predecessors, (40), 14 states have call successors, (40) [2024-11-28 05:07:19,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 05:07:25,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 05:07:28,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:07:28,100 INFO L93 Difference]: Finished difference Result 4509 states and 5824 transitions. [2024-11-28 05:07:28,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-28 05:07:28,101 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.4) internal successors, (60), 23 states have internal predecessors, (60), 15 states have call successors, (41), 2 states have call predecessors, (41), 3 states have return successors, (40), 13 states have call predecessors, (40), 14 states have call successors, (40) Word has length 249 [2024-11-28 05:07:28,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:07:28,110 INFO L225 Difference]: With dead ends: 4509 [2024-11-28 05:07:28,110 INFO L226 Difference]: Without dead ends: 4504 [2024-11-28 05:07:28,111 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=176, Invalid=1804, Unknown=0, NotChecked=0, Total=1980 [2024-11-28 05:07:28,111 INFO L435 NwaCegarLoop]: 90 mSDtfsCounter, 85 mSDsluCounter, 1389 mSDsCounter, 0 mSdLazyCounter, 1764 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 1479 SdHoareTripleChecker+Invalid, 1824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.8s IncrementalHoareTripleChecker+Time [2024-11-28 05:07:28,111 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 1479 Invalid, 1824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1764 Invalid, 0 Unknown, 0 Unchecked, 22.8s Time] [2024-11-28 05:07:28,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4504 states. [2024-11-28 05:07:32,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4504 to 4462. [2024-11-28 05:07:32,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4462 states, 2831 states have (on average 1.178382197103497) internal successors, (3336), 2845 states have internal predecessors, (3336), 1208 states have call successors, (1208), 423 states have call predecessors, (1208), 422 states have return successors, (1205), 1193 states have call predecessors, (1205), 1205 states have call successors, (1205) [2024-11-28 05:07:32,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4462 states to 4462 states and 5749 transitions. [2024-11-28 05:07:32,088 INFO L78 Accepts]: Start accepts. Automaton has 4462 states and 5749 transitions. Word has length 249 [2024-11-28 05:07:32,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:07:32,088 INFO L471 AbstractCegarLoop]: Abstraction has 4462 states and 5749 transitions. [2024-11-28 05:07:32,088 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.4) internal successors, (60), 23 states have internal predecessors, (60), 15 states have call successors, (41), 2 states have call predecessors, (41), 3 states have return successors, (40), 13 states have call predecessors, (40), 14 states have call successors, (40) [2024-11-28 05:07:32,089 INFO L276 IsEmpty]: Start isEmpty. Operand 4462 states and 5749 transitions. [2024-11-28 05:07:32,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2024-11-28 05:07:32,093 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:07:32,093 INFO L218 NwaCegarLoop]: trace histogram [37, 36, 36, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:07:32,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2024-11-28 05:07:32,293 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:07:32,294 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:07:32,294 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:07:32,294 INFO L85 PathProgramCache]: Analyzing trace with hash 703090590, now seen corresponding path program 11 times [2024-11-28 05:07:32,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:07:32,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019128696] [2024-11-28 05:07:32,294 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:07:32,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:07:32,337 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-11-28 05:07:32,337 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 05:07:32,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [441258745] [2024-11-28 05:07:32,339 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:07:32,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:07:32,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:07:32,342 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:07:32,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4d23cc5-04a4-4509-a711-17f5cfea189a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-11-28 05:07:32,614 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-11-28 05:07:32,614 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:07:32,621 INFO L256 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-11-28 05:07:32,626 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:08:00,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2889 backedges. 151 proven. 398 refuted. 0 times theorem prover too weak. 2340 trivial. 0 not checked. [2024-11-28 05:08:00,704 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:08:08,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:08:08,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019128696] [2024-11-28 05:08:08,944 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:08:08,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441258745] [2024-11-28 05:08:08,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441258745] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:08:08,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 05:08:08,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-11-28 05:08:08,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232613873] [2024-11-28 05:08:08,944 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 05:08:08,945 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 05:08:08,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:08:08,945 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 05:08:08,945 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2024-11-28 05:08:08,946 INFO L87 Difference]: Start difference. First operand 4462 states and 5749 transitions. Second operand has 23 states, 22 states have (on average 2.590909090909091) internal successors, (57), 20 states have internal predecessors, (57), 14 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (40), 13 states have call predecessors, (40), 13 states have call successors, (40)