./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound50.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_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/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_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/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_98c82166-485d-4fec-a8a5-a4d615ea9971/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 deef9b1f63fa90bdeace0bbb769d25578ef53bda95c70ad5e444555427b2b0e2 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 23:32:23,747 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 23:32:23,830 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-27 23:32:23,836 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 23:32:23,836 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 23:32:23,873 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 23:32:23,875 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 23:32:23,876 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 23:32:23,876 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 23:32:23,877 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 23:32:23,877 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 23:32:23,878 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 23:32:23,878 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 23:32:23,878 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 23:32:23,878 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 23:32:23,878 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 23:32:23,879 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-27 23:32:23,879 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 23:32:23,879 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 23:32:23,879 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 23:32:23,880 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 23:32:23,880 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-27 23:32:23,880 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 23:32:23,880 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-27 23:32:23,880 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 23:32:23,880 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-27 23:32:23,880 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 23:32:23,880 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 23:32:23,881 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 23:32:23,881 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 23:32:23,881 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 23:32:23,881 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 23:32:23,881 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:32:23,881 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 23:32:23,882 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 23:32:23,882 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 23:32:23,882 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 23:32:23,882 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:32:23,883 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 23:32:23,883 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 23:32:23,883 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-27 23:32:23,883 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-27 23:32:23,883 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 23:32:23,883 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 23:32:23,883 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 23:32:23,883 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 23:32:23,883 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 23:32:23,883 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 23:32:23,884 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_98c82166-485d-4fec-a8a5-a4d615ea9971/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 -> deef9b1f63fa90bdeace0bbb769d25578ef53bda95c70ad5e444555427b2b0e2 [2024-11-27 23:32:24,213 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 23:32:24,223 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 23:32:24,227 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 23:32:24,228 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 23:32:24,228 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 23:32:24,230 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound50.c [2024-11-27 23:32:27,247 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/data/22071263a/3f8a1e50ccdf42cab7a13046c72dfcaf/FLAG5e2108ec6 [2024-11-27 23:32:27,519 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 23:32:27,520 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound50.c [2024-11-27 23:32:27,536 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/data/22071263a/3f8a1e50ccdf42cab7a13046c72dfcaf/FLAG5e2108ec6 [2024-11-27 23:32:27,555 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/data/22071263a/3f8a1e50ccdf42cab7a13046c72dfcaf [2024-11-27 23:32:27,557 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 23:32:27,559 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 23:32:27,561 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 23:32:27,561 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 23:32:27,566 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 23:32:27,567 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:32:27" (1/1) ... [2024-11-27 23:32:27,568 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a7f97d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:32:27, skipping insertion in model container [2024-11-27 23:32:27,569 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:32:27" (1/1) ... [2024-11-27 23:32:27,586 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 23:32:27,772 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_98c82166-485d-4fec-a8a5-a4d615ea9971/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound50.c[490,503] [2024-11-27 23:32:27,809 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 23:32:27,821 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 23:32:27,833 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_98c82166-485d-4fec-a8a5-a4d615ea9971/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound50.c[490,503] [2024-11-27 23:32:27,848 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 23:32:27,865 INFO L204 MainTranslator]: Completed translation [2024-11-27 23:32:27,866 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:32:27 WrapperNode [2024-11-27 23:32:27,867 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 23:32:27,868 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 23:32:27,868 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 23:32:27,868 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 23:32:27,877 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:32:27" (1/1) ... [2024-11-27 23:32:27,883 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:32:27" (1/1) ... [2024-11-27 23:32:27,902 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 84 [2024-11-27 23:32:27,902 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 23:32:27,903 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 23:32:27,904 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 23:32:27,904 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 23:32:27,912 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:32:27" (1/1) ... [2024-11-27 23:32:27,912 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:32:27" (1/1) ... [2024-11-27 23:32:27,913 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:32:27" (1/1) ... [2024-11-27 23:32:27,924 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]. [2024-11-27 23:32:27,924 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:32:27" (1/1) ... [2024-11-27 23:32:27,924 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:32:27" (1/1) ... [2024-11-27 23:32:27,928 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:32:27" (1/1) ... [2024-11-27 23:32:27,929 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:32:27" (1/1) ... [2024-11-27 23:32:27,932 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:32:27" (1/1) ... [2024-11-27 23:32:27,933 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:32:27" (1/1) ... [2024-11-27 23:32:27,934 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:32:27" (1/1) ... [2024-11-27 23:32:27,935 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 23:32:27,936 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 23:32:27,936 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 23:32:27,936 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 23:32:27,937 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:32:27" (1/1) ... [2024-11-27 23:32:27,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:32:27,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:32:27,975 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 23:32:27,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 23:32:28,011 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 23:32:28,011 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-27 23:32:28,011 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-27 23:32:28,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-27 23:32:28,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 23:32:28,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 23:32:28,011 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-27 23:32:28,011 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-27 23:32:28,077 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 23:32:28,079 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 23:32:28,268 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-11-27 23:32:28,268 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 23:32:28,278 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 23:32:28,278 INFO L312 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-27 23:32:28,279 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:32:28 BoogieIcfgContainer [2024-11-27 23:32:28,279 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 23:32:28,282 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 23:32:28,282 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 23:32:28,287 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 23:32:28,288 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 11:32:27" (1/3) ... [2024-11-27 23:32:28,289 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b33721d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:32:28, skipping insertion in model container [2024-11-27 23:32:28,289 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:32:27" (2/3) ... [2024-11-27 23:32:28,289 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b33721d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:32:28, skipping insertion in model container [2024-11-27 23:32:28,289 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:32:28" (3/3) ... [2024-11-27 23:32:28,291 INFO L128 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound50.c [2024-11-27 23:32:28,308 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 23:32:28,309 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG egcd2-ll_unwindbound50.c that has 3 procedures, 34 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-27 23:32:28,388 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 23:32:28,404 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;@7ea045d9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 23:32:28,404 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-27 23:32:28,413 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) [2024-11-27 23:32:28,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-27 23:32:28,421 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:28,422 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:32:28,422 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:32:28,427 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:28,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1022199732, now seen corresponding path program 1 times [2024-11-27 23:32:28,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:32:28,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842452796] [2024-11-27 23:32:28,437 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:28,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:32:28,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:28,654 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-27 23:32:28,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:32:28,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842452796] [2024-11-27 23:32:28,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842452796] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:32:28,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358507195] [2024-11-27 23:32:28,659 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:28,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:28,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:32:28,664 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:32:28,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 23:32:28,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:28,781 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-27 23:32:28,787 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:32:28,803 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-27 23:32:28,805 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:32:28,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358507195] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:32:28,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 23:32:28,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2024-11-27 23:32:28,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686246474] [2024-11-27 23:32:28,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:32:28,813 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-27 23:32:28,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:32:28,836 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-27 23:32:28,837 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-27 23:32:28,839 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) [2024-11-27 23:32:28,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:28,870 INFO L93 Difference]: Finished difference Result 65 states and 104 transitions. [2024-11-27 23:32:28,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-27 23:32:28,874 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 [2024-11-27 23:32:28,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:28,880 INFO L225 Difference]: With dead ends: 65 [2024-11-27 23:32:28,880 INFO L226 Difference]: Without dead ends: 30 [2024-11-27 23:32:28,888 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 [2024-11-27 23:32:28,893 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 [2024-11-27 23:32:28,894 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] [2024-11-27 23:32:28,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-27 23:32:28,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-11-27 23:32:28,933 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) [2024-11-27 23:32:28,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2024-11-27 23:32:28,943 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 28 [2024-11-27 23:32:28,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:28,943 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2024-11-27 23:32:28,944 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) [2024-11-27 23:32:28,944 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2024-11-27 23:32:28,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-27 23:32:28,945 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:28,947 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] [2024-11-27 23:32:28,957 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-27 23:32:29,150 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-11-27 23:32:29,151 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:32:29,152 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:29,152 INFO L85 PathProgramCache]: Analyzing trace with hash -482926610, now seen corresponding path program 1 times [2024-11-27 23:32:29,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:32:29,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740188691] [2024-11-27 23:32:29,152 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:29,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:32:29,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:29,318 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-27 23:32:29,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:32:29,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740188691] [2024-11-27 23:32:29,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740188691] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:32:29,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:32:29,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 23:32:29,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788820336] [2024-11-27 23:32:29,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:32:29,320 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 23:32:29,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:32:29,320 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 23:32:29,321 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 23:32:29,321 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) [2024-11-27 23:32:29,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:29,366 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2024-11-27 23:32:29,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 23:32:29,367 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 [2024-11-27 23:32:29,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:29,368 INFO L225 Difference]: With dead ends: 40 [2024-11-27 23:32:29,368 INFO L226 Difference]: Without dead ends: 32 [2024-11-27 23:32:29,368 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 [2024-11-27 23:32:29,369 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 [2024-11-27 23:32:29,369 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] [2024-11-27 23:32:29,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-27 23:32:29,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-11-27 23:32:29,381 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) [2024-11-27 23:32:29,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2024-11-27 23:32:29,383 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 29 [2024-11-27 23:32:29,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:29,384 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2024-11-27 23:32:29,384 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) [2024-11-27 23:32:29,384 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2024-11-27 23:32:29,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-27 23:32:29,387 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:29,387 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] [2024-11-27 23:32:29,387 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-27 23:32:29,387 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:32:29,388 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:29,388 INFO L85 PathProgramCache]: Analyzing trace with hash 2088040982, now seen corresponding path program 1 times [2024-11-27 23:32:29,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:32:29,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546774772] [2024-11-27 23:32:29,389 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:29,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:32:29,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:29,702 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-27 23:32:29,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:32:29,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546774772] [2024-11-27 23:32:29,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546774772] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:32:29,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010349463] [2024-11-27 23:32:29,702 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:29,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:29,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:32:29,707 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:32:29,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 23:32:29,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:29,795 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-27 23:32:29,797 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:32:30,044 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-27 23:32:30,044 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:32:30,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010349463] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:32:30,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 23:32:30,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2024-11-27 23:32:30,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403304986] [2024-11-27 23:32:30,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:32:30,045 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 23:32:30,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:32:30,046 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 23:32:30,046 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-11-27 23:32:30,046 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) [2024-11-27 23:32:30,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:30,207 INFO L93 Difference]: Finished difference Result 49 states and 67 transitions. [2024-11-27 23:32:30,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 23:32:30,208 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 [2024-11-27 23:32:30,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:30,209 INFO L225 Difference]: With dead ends: 49 [2024-11-27 23:32:30,209 INFO L226 Difference]: Without dead ends: 47 [2024-11-27 23:32:30,209 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 [2024-11-27 23:32:30,210 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 [2024-11-27 23:32:30,210 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] [2024-11-27 23:32:30,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-27 23:32:30,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2024-11-27 23:32:30,230 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) [2024-11-27 23:32:30,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 63 transitions. [2024-11-27 23:32:30,234 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 63 transitions. Word has length 30 [2024-11-27 23:32:30,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:30,234 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 63 transitions. [2024-11-27 23:32:30,234 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) [2024-11-27 23:32:30,234 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 63 transitions. [2024-11-27 23:32:30,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-27 23:32:30,235 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:30,235 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] [2024-11-27 23:32:30,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-27 23:32:30,435 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:30,436 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:32:30,436 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:30,437 INFO L85 PathProgramCache]: Analyzing trace with hash 769472419, now seen corresponding path program 1 times [2024-11-27 23:32:30,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:32:30,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45761065] [2024-11-27 23:32:30,437 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:30,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:32:30,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-27 23:32:30,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1567637297] [2024-11-27 23:32:30,484 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:30,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:30,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:32:30,487 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:32:30,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 23:32:30,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:30,557 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-27 23:32:30,559 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:32:30,629 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-27 23:32:30,630 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:32:30,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:32:30,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45761065] [2024-11-27 23:32:30,631 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:32:30,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567637297] [2024-11-27 23:32:30,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567637297] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:32:30,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:32:30,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 23:32:30,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925942100] [2024-11-27 23:32:30,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:32:30,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 23:32:30,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:32:30,634 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 23:32:30,634 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 23:32:30,635 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) [2024-11-27 23:32:30,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:30,709 INFO L93 Difference]: Finished difference Result 66 states and 95 transitions. [2024-11-27 23:32:30,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 23:32:30,710 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 [2024-11-27 23:32:30,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:30,712 INFO L225 Difference]: With dead ends: 66 [2024-11-27 23:32:30,712 INFO L226 Difference]: Without dead ends: 64 [2024-11-27 23:32:30,713 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 [2024-11-27 23:32:30,715 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 [2024-11-27 23:32:30,717 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] [2024-11-27 23:32:30,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-27 23:32:30,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 55. [2024-11-27 23:32:30,740 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) [2024-11-27 23:32:30,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 76 transitions. [2024-11-27 23:32:30,747 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 76 transitions. Word has length 32 [2024-11-27 23:32:30,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:30,747 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 76 transitions. [2024-11-27 23:32:30,747 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) [2024-11-27 23:32:30,747 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 76 transitions. [2024-11-27 23:32:30,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-27 23:32:30,748 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:30,748 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] [2024-11-27 23:32:30,759 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-27 23:32:30,949 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:30,949 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:32:30,950 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:30,950 INFO L85 PathProgramCache]: Analyzing trace with hash 55994570, now seen corresponding path program 1 times [2024-11-27 23:32:30,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:32:30,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756271513] [2024-11-27 23:32:30,950 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:30,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:32:30,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:31,085 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-27 23:32:31,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:32:31,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756271513] [2024-11-27 23:32:31,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756271513] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:32:31,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765237817] [2024-11-27 23:32:31,086 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:31,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:31,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:32:31,090 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:32:31,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-27 23:32:31,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:31,144 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-27 23:32:31,148 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:32:31,287 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-27 23:32:31,288 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:32:31,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765237817] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:32:31,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 23:32:31,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-11-27 23:32:31,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172780409] [2024-11-27 23:32:31,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:32:31,288 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 23:32:31,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:32:31,289 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 23:32:31,289 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-11-27 23:32:31,289 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) [2024-11-27 23:32:31,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:31,375 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2024-11-27 23:32:31,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 23:32:31,376 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 [2024-11-27 23:32:31,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:31,377 INFO L225 Difference]: With dead ends: 63 [2024-11-27 23:32:31,377 INFO L226 Difference]: Without dead ends: 59 [2024-11-27 23:32:31,377 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 [2024-11-27 23:32:31,378 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 [2024-11-27 23:32:31,378 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] [2024-11-27 23:32:31,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-27 23:32:31,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2024-11-27 23:32:31,406 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) [2024-11-27 23:32:31,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2024-11-27 23:32:31,409 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 76 transitions. Word has length 35 [2024-11-27 23:32:31,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:31,409 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 76 transitions. [2024-11-27 23:32:31,409 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) [2024-11-27 23:32:31,409 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 76 transitions. [2024-11-27 23:32:31,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-27 23:32:31,410 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:31,410 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] [2024-11-27 23:32:31,421 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-27 23:32:31,610 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:31,611 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:32:31,611 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:31,611 INFO L85 PathProgramCache]: Analyzing trace with hash 290957379, now seen corresponding path program 1 times [2024-11-27 23:32:31,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:32:31,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302543204] [2024-11-27 23:32:31,612 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:31,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:32:31,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:31,697 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-27 23:32:31,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:32:31,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302543204] [2024-11-27 23:32:31,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302543204] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:32:31,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:32:31,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 23:32:31,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475203600] [2024-11-27 23:32:31,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:32:31,698 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 23:32:31,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:32:31,699 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 23:32:31,699 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-27 23:32:31,699 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) [2024-11-27 23:32:31,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:31,732 INFO L93 Difference]: Finished difference Result 84 states and 111 transitions. [2024-11-27 23:32:31,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 23:32:31,733 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 [2024-11-27 23:32:31,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:31,734 INFO L225 Difference]: With dead ends: 84 [2024-11-27 23:32:31,734 INFO L226 Difference]: Without dead ends: 58 [2024-11-27 23:32:31,735 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 [2024-11-27 23:32:31,735 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 [2024-11-27 23:32:31,736 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] [2024-11-27 23:32:31,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-27 23:32:31,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2024-11-27 23:32:31,746 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) [2024-11-27 23:32:31,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 75 transitions. [2024-11-27 23:32:31,747 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 75 transitions. Word has length 35 [2024-11-27 23:32:31,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:31,748 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 75 transitions. [2024-11-27 23:32:31,748 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) [2024-11-27 23:32:31,748 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 75 transitions. [2024-11-27 23:32:31,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-27 23:32:31,749 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:31,749 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] [2024-11-27 23:32:31,749 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-27 23:32:31,749 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:32:31,750 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:31,750 INFO L85 PathProgramCache]: Analyzing trace with hash -536481827, now seen corresponding path program 1 times [2024-11-27 23:32:31,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:32:31,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257162885] [2024-11-27 23:32:31,750 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:31,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:32:31,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-27 23:32:31,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [879661783] [2024-11-27 23:32:31,773 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:31,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:31,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:32:31,776 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:32:31,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-27 23:32:31,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:31,852 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-27 23:32:31,854 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:32:32,124 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-27 23:32:32,124 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:32:32,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:32:32,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257162885] [2024-11-27 23:32:32,125 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:32:32,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879661783] [2024-11-27 23:32:32,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879661783] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:32:32,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:32:32,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 23:32:32,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871369563] [2024-11-27 23:32:32,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:32:32,126 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 23:32:32,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:32:32,127 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 23:32:32,127 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 23:32:32,127 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) [2024-11-27 23:32:32,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:32,215 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2024-11-27 23:32:32,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 23:32:32,215 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 [2024-11-27 23:32:32,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:32,217 INFO L225 Difference]: With dead ends: 65 [2024-11-27 23:32:32,217 INFO L226 Difference]: Without dead ends: 63 [2024-11-27 23:32:32,217 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 [2024-11-27 23:32:32,218 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 [2024-11-27 23:32:32,218 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] [2024-11-27 23:32:32,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-27 23:32:32,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2024-11-27 23:32:32,242 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) [2024-11-27 23:32:32,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 78 transitions. [2024-11-27 23:32:32,243 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 78 transitions. Word has length 47 [2024-11-27 23:32:32,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:32,247 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 78 transitions. [2024-11-27 23:32:32,247 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) [2024-11-27 23:32:32,247 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 78 transitions. [2024-11-27 23:32:32,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-27 23:32:32,248 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:32,248 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] [2024-11-27 23:32:32,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-27 23:32:32,452 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-27 23:32:32,453 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:32:32,453 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:32,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1556422495, now seen corresponding path program 1 times [2024-11-27 23:32:32,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:32:32,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524286795] [2024-11-27 23:32:32,454 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:32,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:32:32,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-27 23:32:32,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [164945969] [2024-11-27 23:32:32,479 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:32,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:32,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:32:32,481 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:32:32,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-27 23:32:32,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:32,563 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-27 23:32:32,565 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:32:32,709 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-27 23:32:32,709 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:32:32,853 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-27 23:32:32,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:32:32,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524286795] [2024-11-27 23:32:32,853 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:32:32,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164945969] [2024-11-27 23:32:32,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164945969] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 23:32:32,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 23:32:32,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-11-27 23:32:32,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431468429] [2024-11-27 23:32:32,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:32:32,854 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 23:32:32,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:32:32,855 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 23:32:32,855 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-27 23:32:32,855 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) [2024-11-27 23:32:32,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:32,940 INFO L93 Difference]: Finished difference Result 68 states and 83 transitions. [2024-11-27 23:32:32,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 23:32:32,942 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 [2024-11-27 23:32:32,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:32,946 INFO L225 Difference]: With dead ends: 68 [2024-11-27 23:32:32,946 INFO L226 Difference]: Without dead ends: 66 [2024-11-27 23:32:32,946 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 [2024-11-27 23:32:32,947 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 5 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2024-11-27 23:32:32,947 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] [2024-11-27 23:32:32,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-27 23:32:32,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2024-11-27 23:32:32,967 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) [2024-11-27 23:32:32,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2024-11-27 23:32:32,968 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 55 [2024-11-27 23:32:32,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:32,969 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2024-11-27 23:32:32,969 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) [2024-11-27 23:32:32,969 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2024-11-27 23:32:32,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-27 23:32:32,972 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:32,972 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] [2024-11-27 23:32:32,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-27 23:32:33,172 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-27 23:32:33,173 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:32:33,174 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:33,174 INFO L85 PathProgramCache]: Analyzing trace with hash 921028846, now seen corresponding path program 1 times [2024-11-27 23:32:33,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:32:33,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707726191] [2024-11-27 23:32:33,174 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:33,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:32:33,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:33,373 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-27 23:32:33,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:32:33,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707726191] [2024-11-27 23:32:33,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707726191] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:32:33,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639502632] [2024-11-27 23:32:33,373 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:33,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:33,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:32:33,376 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:32:33,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-27 23:32:33,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:33,444 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-27 23:32:33,446 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:32:33,561 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-27 23:32:33,561 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:32:33,689 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-27 23:32:33,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639502632] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:32:33,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:32:33,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2024-11-27 23:32:33,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175151425] [2024-11-27 23:32:33,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:32:33,690 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-27 23:32:33,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:32:33,691 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-27 23:32:33,691 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-11-27 23:32:33,692 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) [2024-11-27 23:32:33,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:33,931 INFO L93 Difference]: Finished difference Result 211 states and 250 transitions. [2024-11-27 23:32:33,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-27 23:32:33,932 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 [2024-11-27 23:32:33,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:33,934 INFO L225 Difference]: With dead ends: 211 [2024-11-27 23:32:33,934 INFO L226 Difference]: Without dead ends: 203 [2024-11-27 23:32:33,935 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 [2024-11-27 23:32:33,935 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 72 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:32:33,936 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 151 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 23:32:33,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2024-11-27 23:32:33,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 195. [2024-11-27 23:32:34,001 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) [2024-11-27 23:32:34,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 233 transitions. [2024-11-27 23:32:34,003 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 233 transitions. Word has length 56 [2024-11-27 23:32:34,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:34,005 INFO L471 AbstractCegarLoop]: Abstraction has 195 states and 233 transitions. [2024-11-27 23:32:34,005 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) [2024-11-27 23:32:34,005 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 233 transitions. [2024-11-27 23:32:34,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-27 23:32:34,008 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:34,009 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] [2024-11-27 23:32:34,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-27 23:32:34,210 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:34,210 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:32:34,210 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:34,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1633980138, now seen corresponding path program 1 times [2024-11-27 23:32:34,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:32:34,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120319046] [2024-11-27 23:32:34,211 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:34,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:32:34,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:34,373 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-27 23:32:34,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:32:34,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120319046] [2024-11-27 23:32:34,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120319046] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:32:34,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283608388] [2024-11-27 23:32:34,374 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:34,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:34,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:32:34,376 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:32:34,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-27 23:32:34,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:34,446 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-27 23:32:34,452 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:32:34,516 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-27 23:32:34,516 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:32:34,659 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-27 23:32:34,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283608388] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:32:34,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:32:34,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-11-27 23:32:34,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524751799] [2024-11-27 23:32:34,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:32:34,660 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-27 23:32:34,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:32:34,660 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-27 23:32:34,660 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-27 23:32:34,661 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) [2024-11-27 23:32:34,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:34,927 INFO L93 Difference]: Finished difference Result 279 states and 364 transitions. [2024-11-27 23:32:34,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 23:32:34,928 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 [2024-11-27 23:32:34,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:34,944 INFO L225 Difference]: With dead ends: 279 [2024-11-27 23:32:34,944 INFO L226 Difference]: Without dead ends: 259 [2024-11-27 23:32:34,945 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 109 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2024-11-27 23:32:34,945 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 [2024-11-27 23:32:34,946 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] [2024-11-27 23:32:34,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2024-11-27 23:32:35,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 235. [2024-11-27 23:32:35,011 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) [2024-11-27 23:32:35,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 299 transitions. [2024-11-27 23:32:35,014 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 299 transitions. Word has length 57 [2024-11-27 23:32:35,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:35,015 INFO L471 AbstractCegarLoop]: Abstraction has 235 states and 299 transitions. [2024-11-27 23:32:35,015 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) [2024-11-27 23:32:35,015 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 299 transitions. [2024-11-27 23:32:35,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-27 23:32:35,017 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:35,017 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] [2024-11-27 23:32:35,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-27 23:32:35,217 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-27 23:32:35,218 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:32:35,218 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:35,218 INFO L85 PathProgramCache]: Analyzing trace with hash 928720413, now seen corresponding path program 1 times [2024-11-27 23:32:35,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:32:35,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001520204] [2024-11-27 23:32:35,218 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:35,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:32:35,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:35,372 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-27 23:32:35,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:32:35,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001520204] [2024-11-27 23:32:35,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001520204] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:32:35,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24097805] [2024-11-27 23:32:35,373 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:35,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:35,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:32:35,376 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:32:35,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-27 23:32:35,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:35,442 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-27 23:32:35,444 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:32:35,550 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-27 23:32:35,550 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:32:35,664 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-27 23:32:35,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24097805] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:32:35,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:32:35,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2024-11-27 23:32:35,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271540514] [2024-11-27 23:32:35,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:32:35,665 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-27 23:32:35,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:32:35,667 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-27 23:32:35,667 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-11-27 23:32:35,667 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) [2024-11-27 23:32:35,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:35,898 INFO L93 Difference]: Finished difference Result 344 states and 448 transitions. [2024-11-27 23:32:35,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-27 23:32:35,898 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 [2024-11-27 23:32:35,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:35,902 INFO L225 Difference]: With dead ends: 344 [2024-11-27 23:32:35,904 INFO L226 Difference]: Without dead ends: 248 [2024-11-27 23:32:35,905 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 [2024-11-27 23:32:35,906 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, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:32:35,908 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 175 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 23:32:35,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2024-11-27 23:32:35,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 244. [2024-11-27 23:32:35,967 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) [2024-11-27 23:32:35,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 302 transitions. [2024-11-27 23:32:35,970 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 302 transitions. Word has length 59 [2024-11-27 23:32:35,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:35,970 INFO L471 AbstractCegarLoop]: Abstraction has 244 states and 302 transitions. [2024-11-27 23:32:35,970 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) [2024-11-27 23:32:35,971 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 302 transitions. [2024-11-27 23:32:35,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-27 23:32:35,971 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:35,972 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] [2024-11-27 23:32:35,980 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-27 23:32:36,175 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:36,176 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:32:36,176 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:36,176 INFO L85 PathProgramCache]: Analyzing trace with hash -307698339, now seen corresponding path program 1 times [2024-11-27 23:32:36,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:32:36,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819479052] [2024-11-27 23:32:36,176 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:36,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:32:36,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-27 23:32:36,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1928111105] [2024-11-27 23:32:36,202 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:36,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:36,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:32:36,205 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:32:36,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-27 23:32:36,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:36,278 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-27 23:32:36,281 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:32:36,645 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-27 23:32:36,645 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:32:36,822 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-11-27 23:32:36,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:32:36,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819479052] [2024-11-27 23:32:36,823 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:32:36,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928111105] [2024-11-27 23:32:36,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928111105] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:32:36,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:32:36,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 12 [2024-11-27 23:32:36,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045357498] [2024-11-27 23:32:36,824 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:32:36,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-27 23:32:36,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:32:36,825 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-27 23:32:36,825 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-11-27 23:32:36,825 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) [2024-11-27 23:32:37,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:37,129 INFO L93 Difference]: Finished difference Result 283 states and 355 transitions. [2024-11-27 23:32:37,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 23:32:37,130 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 [2024-11-27 23:32:37,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:37,133 INFO L225 Difference]: With dead ends: 283 [2024-11-27 23:32:37,133 INFO L226 Difference]: Without dead ends: 278 [2024-11-27 23:32:37,134 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 [2024-11-27 23:32:37,134 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 [2024-11-27 23:32:37,135 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] [2024-11-27 23:32:37,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2024-11-27 23:32:37,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 276. [2024-11-27 23:32:37,191 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) [2024-11-27 23:32:37,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 343 transitions. [2024-11-27 23:32:37,194 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 343 transitions. Word has length 64 [2024-11-27 23:32:37,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:37,194 INFO L471 AbstractCegarLoop]: Abstraction has 276 states and 343 transitions. [2024-11-27 23:32:37,195 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) [2024-11-27 23:32:37,195 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 343 transitions. [2024-11-27 23:32:37,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-27 23:32:37,195 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:37,196 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] [2024-11-27 23:32:37,205 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-27 23:32:37,399 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-27 23:32:37,400 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:32:37,400 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:37,400 INFO L85 PathProgramCache]: Analyzing trace with hash -710006109, now seen corresponding path program 2 times [2024-11-27 23:32:37,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:32:37,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927747609] [2024-11-27 23:32:37,400 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:32:37,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:32:37,428 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:32:37,430 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-27 23:32:37,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1584387574] [2024-11-27 23:32:37,435 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:32:37,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:37,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:32:37,437 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:32:37,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-27 23:32:37,512 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:32:37,512 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:32:37,514 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-27 23:32:37,516 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:32:38,073 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-11-27 23:32:38,074 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:32:38,384 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-11-27 23:32:38,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:32:38,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927747609] [2024-11-27 23:32:38,384 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:32:38,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584387574] [2024-11-27 23:32:38,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584387574] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:32:38,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:32:38,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2024-11-27 23:32:38,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184917371] [2024-11-27 23:32:38,385 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:32:38,385 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-27 23:32:38,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:32:38,386 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-27 23:32:38,386 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2024-11-27 23:32:38,386 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) [2024-11-27 23:32:39,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:39,609 INFO L93 Difference]: Finished difference Result 440 states and 595 transitions. [2024-11-27 23:32:39,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-27 23:32:39,610 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 [2024-11-27 23:32:39,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:39,614 INFO L225 Difference]: With dead ends: 440 [2024-11-27 23:32:39,614 INFO L226 Difference]: Without dead ends: 438 [2024-11-27 23:32:39,615 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 121 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=198, Invalid=672, Unknown=0, NotChecked=0, Total=870 [2024-11-27 23:32:39,616 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 [2024-11-27 23:32:39,616 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] [2024-11-27 23:32:39,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2024-11-27 23:32:39,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 393. [2024-11-27 23:32:39,725 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) [2024-11-27 23:32:39,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 519 transitions. [2024-11-27 23:32:39,729 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 519 transitions. Word has length 69 [2024-11-27 23:32:39,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:39,730 INFO L471 AbstractCegarLoop]: Abstraction has 393 states and 519 transitions. [2024-11-27 23:32:39,730 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) [2024-11-27 23:32:39,730 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 519 transitions. [2024-11-27 23:32:39,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-27 23:32:39,731 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:39,731 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] [2024-11-27 23:32:39,740 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-27 23:32:39,934 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-27 23:32:39,935 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:32:39,935 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:39,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1589401821, now seen corresponding path program 3 times [2024-11-27 23:32:39,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:32:39,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289398967] [2024-11-27 23:32:39,935 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:32:39,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:32:39,985 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-27 23:32:39,986 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-27 23:32:39,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1095858432] [2024-11-27 23:32:39,989 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:32:39,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:39,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:32:39,991 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:32:39,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-27 23:32:40,067 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-27 23:32:40,068 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:32:40,075 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-27 23:32:40,079 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:32:41,285 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 37 proven. 16 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-11-27 23:32:41,285 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:32:41,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:32:41,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289398967] [2024-11-27 23:32:41,456 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:32:41,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095858432] [2024-11-27 23:32:41,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095858432] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:32:41,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-27 23:32:41,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-11-27 23:32:41,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770682113] [2024-11-27 23:32:41,457 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-27 23:32:41,457 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-27 23:32:41,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:32:41,458 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-27 23:32:41,458 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2024-11-27 23:32:41,458 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) [2024-11-27 23:32:42,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:42,176 INFO L93 Difference]: Finished difference Result 416 states and 539 transitions. [2024-11-27 23:32:42,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-27 23:32:42,177 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 [2024-11-27 23:32:42,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:42,180 INFO L225 Difference]: With dead ends: 416 [2024-11-27 23:32:42,182 INFO L226 Difference]: Without dead ends: 412 [2024-11-27 23:32:42,183 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2024-11-27 23:32:42,183 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 [2024-11-27 23:32:42,184 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] [2024-11-27 23:32:42,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2024-11-27 23:32:42,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 411. [2024-11-27 23:32:42,319 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) [2024-11-27 23:32:42,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 532 transitions. [2024-11-27 23:32:42,326 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 532 transitions. Word has length 74 [2024-11-27 23:32:42,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:42,326 INFO L471 AbstractCegarLoop]: Abstraction has 411 states and 532 transitions. [2024-11-27 23:32:42,326 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) [2024-11-27 23:32:42,326 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 532 transitions. [2024-11-27 23:32:42,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-11-27 23:32:42,327 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:42,327 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] [2024-11-27 23:32:42,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-27 23:32:42,528 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-27 23:32:42,528 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:32:42,528 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:42,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1490127654, now seen corresponding path program 1 times [2024-11-27 23:32:42,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:32:42,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691481011] [2024-11-27 23:32:42,529 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:42,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:32:42,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-27 23:32:42,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [20265793] [2024-11-27 23:32:42,548 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:42,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:42,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:32:42,550 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:32:42,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-27 23:32:42,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:42,631 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-27 23:32:42,634 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:32:43,338 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2024-11-27 23:32:43,338 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:32:43,851 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-11-27 23:32:43,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:32:43,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691481011] [2024-11-27 23:32:43,852 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:32:43,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20265793] [2024-11-27 23:32:43,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20265793] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:32:43,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:32:43,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-11-27 23:32:43,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949452926] [2024-11-27 23:32:43,852 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:32:43,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-27 23:32:43,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:32:43,853 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-27 23:32:43,853 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-11-27 23:32:43,853 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) [2024-11-27 23:32:47,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.85s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-27 23:32:48,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:48,898 INFO L93 Difference]: Finished difference Result 608 states and 851 transitions. [2024-11-27 23:32:48,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-27 23:32:48,899 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 [2024-11-27 23:32:48,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:48,903 INFO L225 Difference]: With dead ends: 608 [2024-11-27 23:32:48,903 INFO L226 Difference]: Without dead ends: 597 [2024-11-27 23:32:48,904 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=296, Invalid=1264, Unknown=0, NotChecked=0, Total=1560 [2024-11-27 23:32:48,905 INFO L435 NwaCegarLoop]: 61 mSDtfsCounter, 133 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s 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, 3.9s IncrementalHoareTripleChecker+Time [2024-11-27 23:32:48,906 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 658 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2024-11-27 23:32:48,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2024-11-27 23:32:49,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 553. [2024-11-27 23:32:49,103 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) [2024-11-27 23:32:49,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 773 transitions. [2024-11-27 23:32:49,107 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 773 transitions. Word has length 80 [2024-11-27 23:32:49,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:49,108 INFO L471 AbstractCegarLoop]: Abstraction has 553 states and 773 transitions. [2024-11-27 23:32:49,108 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) [2024-11-27 23:32:49,108 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 773 transitions. [2024-11-27 23:32:49,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-11-27 23:32:49,109 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:49,109 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] [2024-11-27 23:32:49,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-27 23:32:49,313 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-27 23:32:49,314 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:32:49,314 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:49,314 INFO L85 PathProgramCache]: Analyzing trace with hash -948855715, now seen corresponding path program 4 times [2024-11-27 23:32:49,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:32:49,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688385257] [2024-11-27 23:32:49,314 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:32:49,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:32:49,329 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:32:49,330 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:32:49,413 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2024-11-27 23:32:49,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:32:49,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688385257] [2024-11-27 23:32:49,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688385257] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:32:49,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:32:49,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 23:32:49,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993666854] [2024-11-27 23:32:49,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:32:49,415 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 23:32:49,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:32:49,415 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 23:32:49,415 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 23:32:49,416 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) [2024-11-27 23:32:49,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:49,652 INFO L93 Difference]: Finished difference Result 890 states and 1329 transitions. [2024-11-27 23:32:49,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 23:32:49,653 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 [2024-11-27 23:32:49,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:49,665 INFO L225 Difference]: With dead ends: 890 [2024-11-27 23:32:49,665 INFO L226 Difference]: Without dead ends: 626 [2024-11-27 23:32:49,666 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 [2024-11-27 23:32:49,667 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 12 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2024-11-27 23:32:49,667 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] [2024-11-27 23:32:49,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2024-11-27 23:32:49,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 531. [2024-11-27 23:32:49,841 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) [2024-11-27 23:32:49,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 735 transitions. [2024-11-27 23:32:49,845 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 735 transitions. Word has length 91 [2024-11-27 23:32:49,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:49,846 INFO L471 AbstractCegarLoop]: Abstraction has 531 states and 735 transitions. [2024-11-27 23:32:49,846 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) [2024-11-27 23:32:49,846 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 735 transitions. [2024-11-27 23:32:49,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-11-27 23:32:49,847 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:49,848 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] [2024-11-27 23:32:49,848 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-27 23:32:49,849 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:32:49,849 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:49,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1675679129, now seen corresponding path program 1 times [2024-11-27 23:32:49,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:32:49,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867400744] [2024-11-27 23:32:49,850 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:49,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:32:49,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-27 23:32:49,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [245469203] [2024-11-27 23:32:49,882 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:49,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:49,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:32:49,885 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:32:49,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-27 23:32:49,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:49,970 INFO L256 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-27 23:32:49,973 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:32:51,478 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2024-11-27 23:32:51,478 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:32:51,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:32:51,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867400744] [2024-11-27 23:32:51,623 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:32:51,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245469203] [2024-11-27 23:32:51,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245469203] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:32:51,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-27 23:32:51,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-11-27 23:32:51,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827965883] [2024-11-27 23:32:51,623 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-27 23:32:51,624 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-27 23:32:51,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:32:51,624 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-27 23:32:51,624 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2024-11-27 23:32:51,625 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) [2024-11-27 23:32:52,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:52,774 INFO L93 Difference]: Finished difference Result 540 states and 743 transitions. [2024-11-27 23:32:52,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-27 23:32:52,775 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 [2024-11-27 23:32:52,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:52,780 INFO L225 Difference]: With dead ends: 540 [2024-11-27 23:32:52,780 INFO L226 Difference]: Without dead ends: 538 [2024-11-27 23:32:52,781 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2024-11-27 23:32:52,781 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 45 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2024-11-27 23:32:52,781 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 436 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-27 23:32:52,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2024-11-27 23:32:52,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 535. [2024-11-27 23:32:52,964 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) [2024-11-27 23:32:52,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 737 transitions. [2024-11-27 23:32:52,970 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 737 transitions. Word has length 97 [2024-11-27 23:32:52,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:52,970 INFO L471 AbstractCegarLoop]: Abstraction has 535 states and 737 transitions. [2024-11-27 23:32:52,970 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) [2024-11-27 23:32:52,970 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 737 transitions. [2024-11-27 23:32:52,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-11-27 23:32:52,974 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:52,974 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] [2024-11-27 23:32:52,984 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-27 23:32:53,178 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-27 23:32:53,179 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:32:53,179 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:53,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1301197190, now seen corresponding path program 1 times [2024-11-27 23:32:53,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:32:53,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493670889] [2024-11-27 23:32:53,180 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:53,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:32:53,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:53,376 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 46 proven. 11 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2024-11-27 23:32:53,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:32:53,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493670889] [2024-11-27 23:32:53,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493670889] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:32:53,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238478658] [2024-11-27 23:32:53,376 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:53,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:53,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:32:53,378 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:32:53,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-27 23:32:53,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:53,459 INFO L256 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-27 23:32:53,461 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:32:53,504 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 92 proven. 11 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2024-11-27 23:32:53,504 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:32:53,624 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 46 proven. 11 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2024-11-27 23:32:53,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238478658] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:32:53,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:32:53,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2024-11-27 23:32:53,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756466945] [2024-11-27 23:32:53,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:32:53,625 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 23:32:53,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:32:53,630 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 23:32:53,630 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-27 23:32:53,630 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) [2024-11-27 23:32:54,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:54,134 INFO L93 Difference]: Finished difference Result 731 states and 1053 transitions. [2024-11-27 23:32:54,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-27 23:32:54,134 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 [2024-11-27 23:32:54,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:54,141 INFO L225 Difference]: With dead ends: 731 [2024-11-27 23:32:54,141 INFO L226 Difference]: Without dead ends: 718 [2024-11-27 23:32:54,142 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 [2024-11-27 23:32:54,143 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 [2024-11-27 23:32:54,143 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] [2024-11-27 23:32:54,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2024-11-27 23:32:54,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 579. [2024-11-27 23:32:54,360 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) [2024-11-27 23:32:54,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 801 transitions. [2024-11-27 23:32:54,364 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 801 transitions. Word has length 112 [2024-11-27 23:32:54,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:54,364 INFO L471 AbstractCegarLoop]: Abstraction has 579 states and 801 transitions. [2024-11-27 23:32:54,364 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) [2024-11-27 23:32:54,364 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 801 transitions. [2024-11-27 23:32:54,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-11-27 23:32:54,366 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:54,366 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] [2024-11-27 23:32:54,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-27 23:32:54,566 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-27 23:32:54,567 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:32:54,567 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:54,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1536159999, now seen corresponding path program 1 times [2024-11-27 23:32:54,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:32:54,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641608163] [2024-11-27 23:32:54,567 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:54,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:32:54,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:54,832 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-11-27 23:32:54,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:32:54,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641608163] [2024-11-27 23:32:54,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641608163] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:32:54,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426403318] [2024-11-27 23:32:54,833 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:54,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:54,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:32:54,835 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:32:54,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-27 23:32:54,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:54,933 INFO L256 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-27 23:32:54,936 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:32:55,088 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 229 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2024-11-27 23:32:55,088 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:32:55,325 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-11-27 23:32:55,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426403318] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:32:55,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:32:55,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 18 [2024-11-27 23:32:55,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885846806] [2024-11-27 23:32:55,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:32:55,327 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-27 23:32:55,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:32:55,327 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-27 23:32:55,328 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2024-11-27 23:32:55,328 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) [2024-11-27 23:32:56,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:56,377 INFO L93 Difference]: Finished difference Result 1898 states and 2638 transitions. [2024-11-27 23:32:56,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-27 23:32:56,378 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 [2024-11-27 23:32:56,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:56,390 INFO L225 Difference]: With dead ends: 1898 [2024-11-27 23:32:56,390 INFO L226 Difference]: Without dead ends: 1589 [2024-11-27 23:32:56,395 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 [2024-11-27 23:32:56,396 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 247 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2024-11-27 23:32:56,397 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] [2024-11-27 23:32:56,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2024-11-27 23:32:56,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1515. [2024-11-27 23:32:56,836 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) [2024-11-27 23:32:56,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1515 states to 1515 states and 1986 transitions. [2024-11-27 23:32:56,845 INFO L78 Accepts]: Start accepts. Automaton has 1515 states and 1986 transitions. Word has length 112 [2024-11-27 23:32:56,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:56,845 INFO L471 AbstractCegarLoop]: Abstraction has 1515 states and 1986 transitions. [2024-11-27 23:32:56,846 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) [2024-11-27 23:32:56,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1515 states and 1986 transitions. [2024-11-27 23:32:56,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2024-11-27 23:32:56,847 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:56,847 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] [2024-11-27 23:32:56,857 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-27 23:32:57,051 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:57,052 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:32:57,052 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:57,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1745074663, now seen corresponding path program 2 times [2024-11-27 23:32:57,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:32:57,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88109404] [2024-11-27 23:32:57,052 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:32:57,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:32:57,080 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:32:57,080 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-27 23:32:57,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [883965539] [2024-11-27 23:32:57,081 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:32:57,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:57,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:32:57,085 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:32:57,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-27 23:32:57,174 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:32:57,174 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:32:57,180 INFO L256 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-27 23:32:57,183 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:32:58,205 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 58 proven. 56 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2024-11-27 23:32:58,206 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:32:58,415 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 78 proven. 7 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2024-11-27 23:32:58,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:32:58,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88109404] [2024-11-27 23:32:58,416 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:32:58,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883965539] [2024-11-27 23:32:58,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883965539] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:32:58,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:32:58,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 23 [2024-11-27 23:32:58,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068903000] [2024-11-27 23:32:58,417 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:32:58,417 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-27 23:32:58,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:32:58,418 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-27 23:32:58,418 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2024-11-27 23:32:58,418 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) [2024-11-27 23:33:00,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:33:00,198 INFO L93 Difference]: Finished difference Result 1674 states and 2186 transitions. [2024-11-27 23:33:00,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-27 23:33:00,198 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 [2024-11-27 23:33:00,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:33:00,206 INFO L225 Difference]: With dead ends: 1674 [2024-11-27 23:33:00,206 INFO L226 Difference]: Without dead ends: 1659 [2024-11-27 23:33:00,208 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2024-11-27 23:33:00,208 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 93 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 0.8s IncrementalHoareTripleChecker+Time [2024-11-27 23:33:00,209 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 595 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-27 23:33:00,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1659 states. [2024-11-27 23:33:00,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1659 to 1585. [2024-11-27 23:33:00,743 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) [2024-11-27 23:33:00,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 2048 transitions. [2024-11-27 23:33:00,753 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 2048 transitions. Word has length 114 [2024-11-27 23:33:00,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:33:00,753 INFO L471 AbstractCegarLoop]: Abstraction has 1585 states and 2048 transitions. [2024-11-27 23:33:00,753 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) [2024-11-27 23:33:00,754 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 2048 transitions. [2024-11-27 23:33:00,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2024-11-27 23:33:00,756 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:33:00,756 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] [2024-11-27 23:33:00,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-27 23:33:00,960 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:33:00,961 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:33:00,961 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:33:00,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1186603161, now seen corresponding path program 3 times [2024-11-27 23:33:00,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:33:00,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288592044] [2024-11-27 23:33:00,962 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:33:00,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:33:01,016 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-27 23:33:01,016 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-27 23:33:01,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1488933795] [2024-11-27 23:33:01,018 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:33:01,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:33:01,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:33:01,020 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:33:01,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-27 23:33:01,100 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-27 23:33:01,100 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:33:01,102 INFO L256 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-27 23:33:01,105 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:33:02,001 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 37 proven. 46 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2024-11-27 23:33:02,002 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:33:02,944 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 38 proven. 36 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2024-11-27 23:33:02,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:33:02,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288592044] [2024-11-27 23:33:02,944 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:33:02,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488933795] [2024-11-27 23:33:02,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488933795] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:33:02,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:33:02,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2024-11-27 23:33:02,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681030701] [2024-11-27 23:33:02,945 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:33:02,945 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-27 23:33:02,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:33:02,946 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-27 23:33:02,946 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2024-11-27 23:33:02,946 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) [2024-11-27 23:33:07,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:33:07,133 INFO L93 Difference]: Finished difference Result 2220 states and 2938 transitions. [2024-11-27 23:33:07,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-27 23:33:07,133 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 [2024-11-27 23:33:07,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:33:07,146 INFO L225 Difference]: With dead ends: 2220 [2024-11-27 23:33:07,146 INFO L226 Difference]: Without dead ends: 2218 [2024-11-27 23:33:07,148 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 [2024-11-27 23:33:07,148 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 [2024-11-27 23:33:07,149 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] [2024-11-27 23:33:07,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2218 states. [2024-11-27 23:33:08,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2218 to 2067. [2024-11-27 23:33:08,024 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) [2024-11-27 23:33:08,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2067 states to 2067 states and 2703 transitions. [2024-11-27 23:33:08,037 INFO L78 Accepts]: Start accepts. Automaton has 2067 states and 2703 transitions. Word has length 119 [2024-11-27 23:33:08,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:33:08,037 INFO L471 AbstractCegarLoop]: Abstraction has 2067 states and 2703 transitions. [2024-11-27 23:33:08,038 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) [2024-11-27 23:33:08,038 INFO L276 IsEmpty]: Start isEmpty. Operand 2067 states and 2703 transitions. [2024-11-27 23:33:08,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-11-27 23:33:08,040 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:33:08,040 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] [2024-11-27 23:33:08,052 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-27 23:33:08,241 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-27 23:33:08,241 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:33:08,241 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:33:08,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1466579619, now seen corresponding path program 4 times [2024-11-27 23:33:08,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:33:08,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388056431] [2024-11-27 23:33:08,242 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:33:08,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:33:08,278 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:33:08,278 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-27 23:33:08,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [391888745] [2024-11-27 23:33:08,280 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:33:08,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:33:08,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:33:08,282 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:33:08,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-27 23:33:08,373 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:33:08,373 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:33:08,375 INFO L256 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-27 23:33:08,378 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:33:10,061 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 100 proven. 59 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2024-11-27 23:33:10,061 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:33:10,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:33:10,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388056431] [2024-11-27 23:33:10,246 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:33:10,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391888745] [2024-11-27 23:33:10,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391888745] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:33:10,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-27 23:33:10,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-11-27 23:33:10,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290803094] [2024-11-27 23:33:10,246 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-27 23:33:10,247 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-27 23:33:10,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:33:10,247 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-27 23:33:10,248 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2024-11-27 23:33:10,248 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) [2024-11-27 23:33:12,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:33:12,329 INFO L93 Difference]: Finished difference Result 2180 states and 2839 transitions. [2024-11-27 23:33:12,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-27 23:33:12,329 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 [2024-11-27 23:33:12,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:33:12,340 INFO L225 Difference]: With dead ends: 2180 [2024-11-27 23:33:12,340 INFO L226 Difference]: Without dead ends: 2178 [2024-11-27 23:33:12,342 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 [2024-11-27 23:33:12,343 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 44 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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, 1.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:33:12,344 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 423 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-27 23:33:12,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2178 states. [2024-11-27 23:33:13,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2178 to 2064. [2024-11-27 23:33:13,020 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) [2024-11-27 23:33:13,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 2693 transitions. [2024-11-27 23:33:13,031 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 2693 transitions. Word has length 120 [2024-11-27 23:33:13,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:33:13,032 INFO L471 AbstractCegarLoop]: Abstraction has 2064 states and 2693 transitions. [2024-11-27 23:33:13,032 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) [2024-11-27 23:33:13,032 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 2693 transitions. [2024-11-27 23:33:13,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-27 23:33:13,034 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:33:13,034 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] [2024-11-27 23:33:13,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-27 23:33:13,234 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:33:13,235 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:33:13,235 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:33:13,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1739915623, now seen corresponding path program 5 times [2024-11-27 23:33:13,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:33:13,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709640033] [2024-11-27 23:33:13,235 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 23:33:13,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:33:13,264 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-27 23:33:13,265 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-27 23:33:13,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1925724767] [2024-11-27 23:33:13,266 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 23:33:13,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:33:13,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:33:13,270 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:33:13,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-27 23:33:13,492 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-27 23:33:13,493 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:33:13,500 INFO L256 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-27 23:33:13,503 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:33:14,961 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 74 proven. 56 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2024-11-27 23:33:14,961 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:33:15,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:33:15,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709640033] [2024-11-27 23:33:15,309 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:33:15,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925724767] [2024-11-27 23:33:15,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925724767] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:33:15,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-27 23:33:15,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-11-27 23:33:15,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032943465] [2024-11-27 23:33:15,309 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-27 23:33:15,310 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-27 23:33:15,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:33:15,310 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-27 23:33:15,310 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2024-11-27 23:33:15,311 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) [2024-11-27 23:33:17,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:33:17,230 INFO L93 Difference]: Finished difference Result 2321 states and 3041 transitions. [2024-11-27 23:33:17,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-27 23:33:17,231 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 [2024-11-27 23:33:17,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:33:17,243 INFO L225 Difference]: With dead ends: 2321 [2024-11-27 23:33:17,243 INFO L226 Difference]: Without dead ends: 2319 [2024-11-27 23:33:17,244 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2024-11-27 23:33:17,245 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 54 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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, 1.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:33:17,245 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 578 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-27 23:33:17,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2319 states. [2024-11-27 23:33:18,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2319 to 2276. [2024-11-27 23:33:18,305 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) [2024-11-27 23:33:18,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 2983 transitions. [2024-11-27 23:33:18,315 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 2983 transitions. Word has length 124 [2024-11-27 23:33:18,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:33:18,316 INFO L471 AbstractCegarLoop]: Abstraction has 2276 states and 2983 transitions. [2024-11-27 23:33:18,316 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) [2024-11-27 23:33:18,316 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 2983 transitions. [2024-11-27 23:33:18,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2024-11-27 23:33:18,318 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:33:18,318 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] [2024-11-27 23:33:18,322 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-27 23:33:18,521 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-27 23:33:18,522 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:33:18,522 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:33:18,522 INFO L85 PathProgramCache]: Analyzing trace with hash -379532178, now seen corresponding path program 1 times [2024-11-27 23:33:18,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:33:18,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120995878] [2024-11-27 23:33:18,523 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:33:18,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:33:18,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:33:18,828 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 50 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2024-11-27 23:33:18,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:33:18,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120995878] [2024-11-27 23:33:18,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120995878] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:33:18,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659768703] [2024-11-27 23:33:18,829 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:33:18,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:33:18,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:33:18,831 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:33:18,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-27 23:33:18,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:33:18,924 INFO L256 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-27 23:33:18,928 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:33:19,133 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 434 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-11-27 23:33:19,133 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:33:19,425 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 50 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2024-11-27 23:33:19,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659768703] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:33:19,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:33:19,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 18 [2024-11-27 23:33:19,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577911490] [2024-11-27 23:33:19,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:33:19,426 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-27 23:33:19,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:33:19,428 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-27 23:33:19,428 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2024-11-27 23:33:19,428 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) [2024-11-27 23:33:20,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:33:20,732 INFO L93 Difference]: Finished difference Result 2350 states and 3055 transitions. [2024-11-27 23:33:20,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-27 23:33:20,732 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 [2024-11-27 23:33:20,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:33:20,742 INFO L225 Difference]: With dead ends: 2350 [2024-11-27 23:33:20,742 INFO L226 Difference]: Without dead ends: 2308 [2024-11-27 23:33:20,743 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 [2024-11-27 23:33:20,744 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 191 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2024-11-27 23:33:20,744 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] [2024-11-27 23:33:20,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2308 states. [2024-11-27 23:33:21,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2308 to 2294. [2024-11-27 23:33:21,706 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) [2024-11-27 23:33:21,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2294 states to 2294 states and 2966 transitions. [2024-11-27 23:33:21,717 INFO L78 Accepts]: Start accepts. Automaton has 2294 states and 2966 transitions. Word has length 129 [2024-11-27 23:33:21,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:33:21,718 INFO L471 AbstractCegarLoop]: Abstraction has 2294 states and 2966 transitions. [2024-11-27 23:33:21,718 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) [2024-11-27 23:33:21,719 INFO L276 IsEmpty]: Start isEmpty. Operand 2294 states and 2966 transitions. [2024-11-27 23:33:21,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2024-11-27 23:33:21,723 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:33:21,723 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] [2024-11-27 23:33:21,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-27 23:33:21,927 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:33:21,928 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:33:21,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:33:21,928 INFO L85 PathProgramCache]: Analyzing trace with hash 998301078, now seen corresponding path program 2 times [2024-11-27 23:33:21,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:33:21,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325129780] [2024-11-27 23:33:21,928 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:33:21,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:33:21,960 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:33:21,960 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-27 23:33:21,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [837266095] [2024-11-27 23:33:21,962 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:33:21,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:33:21,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:33:21,967 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:33:21,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-27 23:33:22,083 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:33:22,084 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:33:22,086 INFO L256 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-11-27 23:33:22,090 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:33:23,298 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 73 proven. 65 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2024-11-27 23:33:23,298 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:33:24,892 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 73 proven. 56 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2024-11-27 23:33:24,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:33:24,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325129780] [2024-11-27 23:33:24,893 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:33:24,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837266095] [2024-11-27 23:33:24,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837266095] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:33:24,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:33:24,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 30 [2024-11-27 23:33:24,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080673760] [2024-11-27 23:33:24,894 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:33:24,894 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-27 23:33:24,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:33:24,895 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-27 23:33:24,895 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2024-11-27 23:33:24,896 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) [2024-11-27 23:33:29,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-27 23:33:37,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:33:37,090 INFO L93 Difference]: Finished difference Result 2644 states and 3487 transitions. [2024-11-27 23:33:37,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-27 23:33:37,091 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 [2024-11-27 23:33:37,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:33:37,108 INFO L225 Difference]: With dead ends: 2644 [2024-11-27 23:33:37,108 INFO L226 Difference]: Without dead ends: 2601 [2024-11-27 23:33:37,111 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=810, Invalid=3222, Unknown=0, NotChecked=0, Total=4032 [2024-11-27 23:33:37,112 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 276 mSDsluCounter, 881 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 949 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2024-11-27 23:33:37,112 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 949 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2024-11-27 23:33:37,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2601 states. [2024-11-27 23:33:38,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2601 to 2534. [2024-11-27 23:33:38,679 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) [2024-11-27 23:33:38,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2534 states to 2534 states and 3342 transitions. [2024-11-27 23:33:38,690 INFO L78 Accepts]: Start accepts. Automaton has 2534 states and 3342 transitions. Word has length 130 [2024-11-27 23:33:38,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:33:38,691 INFO L471 AbstractCegarLoop]: Abstraction has 2534 states and 3342 transitions. [2024-11-27 23:33:38,691 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) [2024-11-27 23:33:38,692 INFO L276 IsEmpty]: Start isEmpty. Operand 2534 states and 3342 transitions. [2024-11-27 23:33:38,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2024-11-27 23:33:38,694 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:33:38,694 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] [2024-11-27 23:33:38,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-27 23:33:38,898 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:33:38,899 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:33:38,899 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:33:38,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1091217127, now seen corresponding path program 6 times [2024-11-27 23:33:38,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:33:38,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889672308] [2024-11-27 23:33:38,899 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 23:33:38,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:33:38,933 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-11-27 23:33:38,933 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-27 23:33:38,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1832242810] [2024-11-27 23:33:38,935 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 23:33:38,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:33:38,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:33:38,939 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:33:38,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-27 23:33:39,080 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-27 23:33:39,080 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:33:39,086 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-27 23:33:39,090 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:33:41,535 INFO L134 CoverageAnalysis]: Checked inductivity of 815 backedges. 118 proven. 34 refuted. 0 times theorem prover too weak. 663 trivial. 0 not checked. [2024-11-27 23:33:41,535 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:33:42,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:33:42,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889672308] [2024-11-27 23:33:42,988 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:33:42,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832242810] [2024-11-27 23:33:42,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832242810] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:33:42,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-27 23:33:42,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-11-27 23:33:42,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851886279] [2024-11-27 23:33:42,990 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-27 23:33:42,990 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-27 23:33:42,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:33:42,991 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-27 23:33:42,991 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2024-11-27 23:33:42,991 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) [2024-11-27 23:33:45,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:33:45,279 INFO L93 Difference]: Finished difference Result 2597 states and 3415 transitions. [2024-11-27 23:33:45,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-27 23:33:45,279 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 [2024-11-27 23:33:45,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:33:45,287 INFO L225 Difference]: With dead ends: 2597 [2024-11-27 23:33:45,287 INFO L226 Difference]: Without dead ends: 2595 [2024-11-27 23:33:45,288 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2024-11-27 23:33:45,288 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 41 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.7s IncrementalHoareTripleChecker+Time [2024-11-27 23:33:45,289 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 436 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-27 23:33:45,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2595 states. [2024-11-27 23:33:46,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2595 to 2580. [2024-11-27 23:33:46,846 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) [2024-11-27 23:33:46,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2580 states to 2580 states and 3391 transitions. [2024-11-27 23:33:46,859 INFO L78 Accepts]: Start accepts. Automaton has 2580 states and 3391 transitions. Word has length 143 [2024-11-27 23:33:46,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:33:46,859 INFO L471 AbstractCegarLoop]: Abstraction has 2580 states and 3391 transitions. [2024-11-27 23:33:46,860 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) [2024-11-27 23:33:46,860 INFO L276 IsEmpty]: Start isEmpty. Operand 2580 states and 3391 transitions. [2024-11-27 23:33:46,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2024-11-27 23:33:46,862 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:33:46,862 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] [2024-11-27 23:33:46,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-27 23:33:47,063 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-27 23:33:47,063 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:33:47,063 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:33:47,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1556970589, now seen corresponding path program 7 times [2024-11-27 23:33:47,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:33:47,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205348347] [2024-11-27 23:33:47,065 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 23:33:47,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:33:47,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-27 23:33:47,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [145201121] [2024-11-27 23:33:47,106 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 23:33:47,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:33:47,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:33:47,110 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:33:47,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-27 23:33:47,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:33:47,270 INFO L256 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-11-27 23:33:47,275 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:33:50,423 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 96 proven. 129 refuted. 0 times theorem prover too weak. 597 trivial. 0 not checked. [2024-11-27 23:33:50,423 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:33:50,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:33:50,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205348347] [2024-11-27 23:33:50,622 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:33:50,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145201121] [2024-11-27 23:33:50,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145201121] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:33:50,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-27 23:33:50,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-11-27 23:33:50,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866419680] [2024-11-27 23:33:50,623 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-27 23:33:50,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-27 23:33:50,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:33:50,624 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-27 23:33:50,624 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2024-11-27 23:33:50,624 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) [2024-11-27 23:33:54,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:33:54,090 INFO L93 Difference]: Finished difference Result 2617 states and 3427 transitions. [2024-11-27 23:33:54,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-27 23:33:54,091 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 [2024-11-27 23:33:54,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:33:54,105 INFO L225 Difference]: With dead ends: 2617 [2024-11-27 23:33:54,105 INFO L226 Difference]: Without dead ends: 2615 [2024-11-27 23:33:54,107 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2024-11-27 23:33:54,108 INFO L435 NwaCegarLoop]: 61 mSDtfsCounter, 57 mSDsluCounter, 841 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s 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, 1.3s IncrementalHoareTripleChecker+Time [2024-11-27 23:33:54,108 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 902 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 881 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-27 23:33:54,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2615 states. [2024-11-27 23:33:55,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2615 to 2604. [2024-11-27 23:33:55,891 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) [2024-11-27 23:33:55,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2604 states to 2604 states and 3408 transitions. [2024-11-27 23:33:55,899 INFO L78 Accepts]: Start accepts. Automaton has 2604 states and 3408 transitions. Word has length 147 [2024-11-27 23:33:55,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:33:55,899 INFO L471 AbstractCegarLoop]: Abstraction has 2604 states and 3408 transitions. [2024-11-27 23:33:55,899 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) [2024-11-27 23:33:55,899 INFO L276 IsEmpty]: Start isEmpty. Operand 2604 states and 3408 transitions. [2024-11-27 23:33:55,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2024-11-27 23:33:55,901 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:33:55,901 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] [2024-11-27 23:33:55,909 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-27 23:33:56,102 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-27 23:33:56,102 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:33:56,103 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:33:56,103 INFO L85 PathProgramCache]: Analyzing trace with hash 937473503, now seen corresponding path program 8 times [2024-11-27 23:33:56,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:33:56,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792182985] [2024-11-27 23:33:56,103 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:33:56,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:33:56,134 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:33:56,134 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-27 23:33:56,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [729259812] [2024-11-27 23:33:56,136 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:33:56,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:33:56,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:33:56,141 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:33:56,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-27 23:33:56,298 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:33:56,299 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:33:56,302 INFO L256 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-11-27 23:33:56,307 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:33:58,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1097 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2024-11-27 23:33:58,204 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:34:02,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1097 backedges. 110 proven. 102 refuted. 0 times theorem prover too weak. 885 trivial. 0 not checked. [2024-11-27 23:34:02,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:34:02,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792182985] [2024-11-27 23:34:02,171 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:34:02,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729259812] [2024-11-27 23:34:02,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729259812] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:34:02,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:34:02,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 33 [2024-11-27 23:34:02,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973877081] [2024-11-27 23:34:02,172 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:34:02,173 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-27 23:34:02,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:34:02,174 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-27 23:34:02,174 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=874, Unknown=0, NotChecked=0, Total=1056 [2024-11-27 23:34:02,175 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) [2024-11-27 23:34:13,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:34:13,662 INFO L93 Difference]: Finished difference Result 2938 states and 3864 transitions. [2024-11-27 23:34:13,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-27 23:34:13,663 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 [2024-11-27 23:34:13,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:34:13,678 INFO L225 Difference]: With dead ends: 2938 [2024-11-27 23:34:13,678 INFO L226 Difference]: Without dead ends: 2936 [2024-11-27 23:34:13,681 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=752, Invalid=3030, Unknown=0, NotChecked=0, Total=3782 [2024-11-27 23:34:13,682 INFO L435 NwaCegarLoop]: 79 mSDtfsCounter, 173 mSDsluCounter, 1023 mSDsCounter, 0 mSdLazyCounter, 1151 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s 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, 4.3s IncrementalHoareTripleChecker+Time [2024-11-27 23:34:13,682 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 1102 Invalid, 1325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 1151 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2024-11-27 23:34:13,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2936 states. [2024-11-27 23:34:15,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2936 to 2894. [2024-11-27 23:34:15,681 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) [2024-11-27 23:34:15,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2894 states to 2894 states and 3803 transitions. [2024-11-27 23:34:15,691 INFO L78 Accepts]: Start accepts. Automaton has 2894 states and 3803 transitions. Word has length 165 [2024-11-27 23:34:15,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:34:15,691 INFO L471 AbstractCegarLoop]: Abstraction has 2894 states and 3803 transitions. [2024-11-27 23:34:15,691 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) [2024-11-27 23:34:15,691 INFO L276 IsEmpty]: Start isEmpty. Operand 2894 states and 3803 transitions. [2024-11-27 23:34:15,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2024-11-27 23:34:15,694 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:34:15,694 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] [2024-11-27 23:34:15,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-11-27 23:34:15,898 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-27 23:34:15,899 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:34:15,899 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:34:15,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1509933593, now seen corresponding path program 9 times [2024-11-27 23:34:15,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:34:15,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908069151] [2024-11-27 23:34:15,900 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:34:15,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:34:15,967 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-27 23:34:15,967 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-27 23:34:15,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [142512674] [2024-11-27 23:34:15,970 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:34:15,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:34:15,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:34:15,973 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:34:15,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-27 23:34:16,098 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-27 23:34:16,098 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:34:16,100 INFO L256 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-27 23:34:16,104 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:34:18,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1192 backedges. 141 proven. 69 refuted. 0 times theorem prover too weak. 982 trivial. 0 not checked. [2024-11-27 23:34:18,333 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:34:18,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:34:18,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908069151] [2024-11-27 23:34:18,579 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:34:18,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142512674] [2024-11-27 23:34:18,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142512674] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:34:18,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-27 23:34:18,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-11-27 23:34:18,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375964503] [2024-11-27 23:34:18,579 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-27 23:34:18,580 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-27 23:34:18,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:34:18,580 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-27 23:34:18,581 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2024-11-27 23:34:18,581 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) [2024-11-27 23:34:21,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:34:21,757 INFO L93 Difference]: Finished difference Result 3163 states and 4143 transitions. [2024-11-27 23:34:21,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-27 23:34:21,758 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 [2024-11-27 23:34:21,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:34:21,773 INFO L225 Difference]: With dead ends: 3163 [2024-11-27 23:34:21,773 INFO L226 Difference]: Without dead ends: 3161 [2024-11-27 23:34:21,775 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2024-11-27 23:34:21,775 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 44 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2024-11-27 23:34:21,775 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 686 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-27 23:34:21,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3161 states. [2024-11-27 23:34:24,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3161 to 3011. [2024-11-27 23:34:24,020 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) [2024-11-27 23:34:24,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3011 states to 3011 states and 3930 transitions. [2024-11-27 23:34:24,033 INFO L78 Accepts]: Start accepts. Automaton has 3011 states and 3930 transitions. Word has length 170 [2024-11-27 23:34:24,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:34:24,034 INFO L471 AbstractCegarLoop]: Abstraction has 3011 states and 3930 transitions. [2024-11-27 23:34:24,034 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) [2024-11-27 23:34:24,034 INFO L276 IsEmpty]: Start isEmpty. Operand 3011 states and 3930 transitions. [2024-11-27 23:34:24,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2024-11-27 23:34:24,037 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:34:24,037 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] [2024-11-27 23:34:24,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-11-27 23:34:24,240 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-27 23:34:24,241 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:34:24,242 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:34:24,242 INFO L85 PathProgramCache]: Analyzing trace with hash 600535841, now seen corresponding path program 10 times [2024-11-27 23:34:24,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:34:24,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848976297] [2024-11-27 23:34:24,242 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:34:24,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:34:24,287 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:34:24,287 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-27 23:34:24,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [948720339] [2024-11-27 23:34:24,289 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:34:24,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:34:24,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:34:24,295 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:34:24,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-27 23:34:24,430 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:34:24,430 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:34:24,433 INFO L256 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-11-27 23:34:24,437 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:34:27,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1192 backedges. 111 proven. 120 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2024-11-27 23:34:27,215 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:34:27,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:34:27,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848976297] [2024-11-27 23:34:27,433 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:34:27,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948720339] [2024-11-27 23:34:27,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948720339] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:34:27,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-27 23:34:27,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-11-27 23:34:27,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726820479] [2024-11-27 23:34:27,434 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-27 23:34:27,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-27 23:34:27,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:34:27,435 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-27 23:34:27,435 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2024-11-27 23:34:27,435 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) [2024-11-27 23:34:31,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:34:31,338 INFO L93 Difference]: Finished difference Result 3076 states and 4001 transitions. [2024-11-27 23:34:31,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-27 23:34:31,339 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 [2024-11-27 23:34:31,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:34:31,353 INFO L225 Difference]: With dead ends: 3076 [2024-11-27 23:34:31,354 INFO L226 Difference]: Without dead ends: 3072 [2024-11-27 23:34:31,355 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2024-11-27 23:34:31,356 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 58 mSDsluCounter, 958 mSDsCounter, 0 mSdLazyCounter, 1007 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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, 1.4s IncrementalHoareTripleChecker+Time [2024-11-27 23:34:31,356 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 1025 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1007 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-27 23:34:31,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3072 states. [2024-11-27 23:34:33,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3072 to 3018. [2024-11-27 23:34:33,690 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) [2024-11-27 23:34:33,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3018 states to 3018 states and 3928 transitions. [2024-11-27 23:34:33,703 INFO L78 Accepts]: Start accepts. Automaton has 3018 states and 3928 transitions. Word has length 170 [2024-11-27 23:34:33,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:34:33,704 INFO L471 AbstractCegarLoop]: Abstraction has 3018 states and 3928 transitions. [2024-11-27 23:34:33,704 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) [2024-11-27 23:34:33,704 INFO L276 IsEmpty]: Start isEmpty. Operand 3018 states and 3928 transitions. [2024-11-27 23:34:33,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2024-11-27 23:34:33,707 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:34:33,707 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] [2024-11-27 23:34:33,718 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-27 23:34:33,911 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:34:33,912 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:34:33,912 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:34:33,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1454390613, now seen corresponding path program 11 times [2024-11-27 23:34:33,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:34:33,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628917747] [2024-11-27 23:34:33,913 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 23:34:33,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:34:33,967 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-11-27 23:34:33,967 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-27 23:34:33,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1497500831] [2024-11-27 23:34:33,969 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 23:34:33,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:34:33,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:34:33,974 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:34:33,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-27 23:34:34,717 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-11-27 23:34:34,717 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:34:34,720 INFO L256 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-27 23:34:34,723 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:34:36,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1203 backedges. 116 proven. 177 refuted. 0 times theorem prover too weak. 910 trivial. 0 not checked. [2024-11-27 23:34:36,176 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:34:36,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:34:36,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628917747] [2024-11-27 23:34:36,613 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:34:36,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497500831] [2024-11-27 23:34:36,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497500831] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:34:36,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-27 23:34:36,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-11-27 23:34:36,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137481648] [2024-11-27 23:34:36,614 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-27 23:34:36,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-27 23:34:36,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:34:36,615 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-27 23:34:36,615 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2024-11-27 23:34:36,615 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) [2024-11-27 23:34:41,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:34:41,206 INFO L93 Difference]: Finished difference Result 3099 states and 4027 transitions. [2024-11-27 23:34:41,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-27 23:34:41,207 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 [2024-11-27 23:34:41,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:34:41,224 INFO L225 Difference]: With dead ends: 3099 [2024-11-27 23:34:41,224 INFO L226 Difference]: Without dead ends: 3097 [2024-11-27 23:34:41,226 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2024-11-27 23:34:41,227 INFO L435 NwaCegarLoop]: 76 mSDtfsCounter, 50 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s 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, 2.0s IncrementalHoareTripleChecker+Time [2024-11-27 23:34:41,228 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 996 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-27 23:34:41,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3097 states. [2024-11-27 23:34:43,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3097 to 3027. [2024-11-27 23:34:43,960 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) [2024-11-27 23:34:43,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3027 states to 3027 states and 3928 transitions. [2024-11-27 23:34:43,974 INFO L78 Accepts]: Start accepts. Automaton has 3027 states and 3928 transitions. Word has length 174 [2024-11-27 23:34:43,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:34:43,975 INFO L471 AbstractCegarLoop]: Abstraction has 3027 states and 3928 transitions. [2024-11-27 23:34:43,975 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) [2024-11-27 23:34:43,976 INFO L276 IsEmpty]: Start isEmpty. Operand 3027 states and 3928 transitions. [2024-11-27 23:34:43,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2024-11-27 23:34:43,979 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:34:43,979 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] [2024-11-27 23:34:43,988 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-27 23:34:44,180 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-11-27 23:34:44,181 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:34:44,181 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:34:44,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1809200098, now seen corresponding path program 3 times [2024-11-27 23:34:44,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:34:44,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928512274] [2024-11-27 23:34:44,181 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:34:44,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:34:44,247 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-27 23:34:44,248 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-27 23:34:44,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1862338144] [2024-11-27 23:34:44,250 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:34:44,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:34:44,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:34:44,252 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:34:44,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-27 23:34:44,499 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-27 23:34:44,499 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:34:44,502 INFO L256 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-27 23:34:44,507 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:34:46,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 169 proven. 96 refuted. 0 times theorem prover too weak. 1026 trivial. 0 not checked. [2024-11-27 23:34:46,101 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:34:55,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:34:55,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928512274] [2024-11-27 23:34:55,166 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:34:55,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862338144] [2024-11-27 23:34:55,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862338144] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:34:55,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-27 23:34:55,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-11-27 23:34:55,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060223111] [2024-11-27 23:34:55,167 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-27 23:34:55,167 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-27 23:34:55,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:34:55,168 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-27 23:34:55,168 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=458, Unknown=2, NotChecked=0, Total=552 [2024-11-27 23:34:55,169 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) [2024-11-27 23:34:58,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:34:58,468 INFO L93 Difference]: Finished difference Result 3353 states and 4325 transitions. [2024-11-27 23:34:58,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-27 23:34:58,469 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 [2024-11-27 23:34:58,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:34:58,480 INFO L225 Difference]: With dead ends: 3353 [2024-11-27 23:34:58,480 INFO L226 Difference]: Without dead ends: 3323 [2024-11-27 23:34:58,482 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 207 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=158, Invalid=710, Unknown=2, NotChecked=0, Total=870 [2024-11-27 23:34:58,482 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 32 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.7s IncrementalHoareTripleChecker+Time [2024-11-27 23:34:58,483 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 572 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-27 23:34:58,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3323 states. [2024-11-27 23:35:00,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3323 to 3269. [2024-11-27 23:35:00,568 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) [2024-11-27 23:35:00,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3269 states to 3269 states and 4223 transitions. [2024-11-27 23:35:00,581 INFO L78 Accepts]: Start accepts. Automaton has 3269 states and 4223 transitions. Word has length 176 [2024-11-27 23:35:00,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:35:00,581 INFO L471 AbstractCegarLoop]: Abstraction has 3269 states and 4223 transitions. [2024-11-27 23:35:00,582 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) [2024-11-27 23:35:00,582 INFO L276 IsEmpty]: Start isEmpty. Operand 3269 states and 4223 transitions. [2024-11-27 23:35:00,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2024-11-27 23:35:00,586 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:35:00,587 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] [2024-11-27 23:35:00,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-11-27 23:35:00,790 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-11-27 23:35:00,791 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:35:00,792 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:35:00,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1994288853, now seen corresponding path program 12 times [2024-11-27 23:35:00,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:35:00,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373986881] [2024-11-27 23:35:00,792 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 23:35:00,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:35:00,846 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-11-27 23:35:00,846 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-27 23:35:00,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [528749079] [2024-11-27 23:35:00,848 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 23:35:00,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:35:00,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:35:00,851 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:35:00,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-27 23:35:01,136 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-27 23:35:01,136 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:35:01,139 INFO L256 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-11-27 23:35:01,144 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:35:05,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1633 backedges. 233 proven. 177 refuted. 0 times theorem prover too weak. 1223 trivial. 0 not checked. [2024-11-27 23:35:05,585 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:35:49,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:35:49,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373986881] [2024-11-27 23:35:49,059 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:35:49,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528749079] [2024-11-27 23:35:49,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528749079] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:35:49,059 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-27 23:35:49,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-11-27 23:35:49,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795749313] [2024-11-27 23:35:49,059 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-27 23:35:49,060 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-27 23:35:49,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:35:49,060 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-27 23:35:49,061 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=609, Unknown=6, NotChecked=0, Total=756 [2024-11-27 23:35:49,061 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) [2024-11-27 23:35:53,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.21s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-27 23:36:10,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:36:10,927 INFO L93 Difference]: Finished difference Result 3526 states and 4541 transitions. [2024-11-27 23:36:10,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-27 23:36:10,928 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 [2024-11-27 23:36:10,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:36:10,940 INFO L225 Difference]: With dead ends: 3526 [2024-11-27 23:36:10,940 INFO L226 Difference]: Without dead ends: 3522 [2024-11-27 23:36:10,941 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 55.7s TimeCoverageRelationStatistics Valid=193, Invalid=790, Unknown=9, NotChecked=0, Total=992 [2024-11-27 23:36:10,942 INFO L435 NwaCegarLoop]: 64 mSDtfsCounter, 35 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2024-11-27 23:36:10,942 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 562 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2024-11-27 23:36:10,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3522 states. [2024-11-27 23:36:13,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3522 to 3360. [2024-11-27 23:36:13,293 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) [2024-11-27 23:36:13,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3360 states to 3360 states and 4313 transitions. [2024-11-27 23:36:13,300 INFO L78 Accepts]: Start accepts. Automaton has 3360 states and 4313 transitions. Word has length 193 [2024-11-27 23:36:13,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:36:13,301 INFO L471 AbstractCegarLoop]: Abstraction has 3360 states and 4313 transitions. [2024-11-27 23:36:13,301 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) [2024-11-27 23:36:13,301 INFO L276 IsEmpty]: Start isEmpty. Operand 3360 states and 4313 transitions. [2024-11-27 23:36:13,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2024-11-27 23:36:13,305 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:36:13,305 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] [2024-11-27 23:36:13,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-11-27 23:36:13,508 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-11-27 23:36:13,509 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:36:13,509 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:36:13,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1366857183, now seen corresponding path program 13 times [2024-11-27 23:36:13,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:36:13,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245677062] [2024-11-27 23:36:13,509 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 23:36:13,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:36:13,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-27 23:36:13,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [70412341] [2024-11-27 23:36:13,545 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 23:36:13,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:36:13,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:36:13,548 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:36:13,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-27 23:36:13,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:36:13,748 INFO L256 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 111 conjuncts are in the unsatisfiable core [2024-11-27 23:36:13,753 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:36:18,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1644 backedges. 316 proven. 239 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2024-11-27 23:36:18,212 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:36:20,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:36:20,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245677062] [2024-11-27 23:36:20,438 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:36:20,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70412341] [2024-11-27 23:36:20,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70412341] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:36:20,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-27 23:36:20,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2024-11-27 23:36:20,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491719203] [2024-11-27 23:36:20,439 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-27 23:36:20,439 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-27 23:36:20,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:36:20,440 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-27 23:36:20,441 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=912, Unknown=0, NotChecked=0, Total=1122 [2024-11-27 23:36:20,441 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) [2024-11-27 23:36:25,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:36:25,065 INFO L93 Difference]: Finished difference Result 3472 states and 4433 transitions. [2024-11-27 23:36:25,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-27 23:36:25,066 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 [2024-11-27 23:36:25,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:36:25,077 INFO L225 Difference]: With dead ends: 3472 [2024-11-27 23:36:25,077 INFO L226 Difference]: Without dead ends: 3470 [2024-11-27 23:36:25,079 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 188 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=345, Invalid=1635, Unknown=0, NotChecked=0, Total=1980 [2024-11-27 23:36:25,080 INFO L435 NwaCegarLoop]: 69 mSDtfsCounter, 72 mSDsluCounter, 1095 mSDsCounter, 0 mSdLazyCounter, 1167 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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, 1.5s IncrementalHoareTripleChecker+Time [2024-11-27 23:36:25,080 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 1164 Invalid, 1247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1167 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-27 23:36:25,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3470 states. [2024-11-27 23:36:27,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3470 to 3445. [2024-11-27 23:36:27,567 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) [2024-11-27 23:36:27,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3445 states to 3445 states and 4401 transitions. [2024-11-27 23:36:27,575 INFO L78 Accepts]: Start accepts. Automaton has 3445 states and 4401 transitions. Word has length 197 [2024-11-27 23:36:27,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:36:27,576 INFO L471 AbstractCegarLoop]: Abstraction has 3445 states and 4401 transitions. [2024-11-27 23:36:27,576 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) [2024-11-27 23:36:27,576 INFO L276 IsEmpty]: Start isEmpty. Operand 3445 states and 4401 transitions. [2024-11-27 23:36:27,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2024-11-27 23:36:27,579 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:36:27,580 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] [2024-11-27 23:36:27,590 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-27 23:36:27,780 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-27 23:36:27,781 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:36:27,781 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:36:27,781 INFO L85 PathProgramCache]: Analyzing trace with hash -625196519, now seen corresponding path program 14 times [2024-11-27 23:36:27,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:36:27,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427088859] [2024-11-27 23:36:27,782 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:36:27,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:36:27,826 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:36:27,826 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-27 23:36:27,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [317554719] [2024-11-27 23:36:27,828 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:36:27,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:36:27,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:36:27,831 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:36:27,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-27 23:36:27,988 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:36:27,989 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:36:27,992 INFO L256 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-11-27 23:36:27,997 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:36:30,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1644 backedges. 139 proven. 236 refuted. 0 times theorem prover too weak. 1269 trivial. 0 not checked. [2024-11-27 23:36:30,382 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:36:30,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:36:30,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427088859] [2024-11-27 23:36:30,691 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:36:30,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317554719] [2024-11-27 23:36:30,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317554719] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:36:30,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-27 23:36:30,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-11-27 23:36:30,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520917387] [2024-11-27 23:36:30,692 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-27 23:36:30,692 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-27 23:36:30,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:36:30,693 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-27 23:36:30,693 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2024-11-27 23:36:30,693 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) [2024-11-27 23:36:35,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:36:35,829 INFO L93 Difference]: Finished difference Result 3529 states and 4499 transitions. [2024-11-27 23:36:35,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-27 23:36:35,829 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 [2024-11-27 23:36:35,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:36:35,840 INFO L225 Difference]: With dead ends: 3529 [2024-11-27 23:36:35,841 INFO L226 Difference]: Without dead ends: 3527 [2024-11-27 23:36:35,842 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=147, Invalid=1113, Unknown=0, NotChecked=0, Total=1260 [2024-11-27 23:36:35,843 INFO L435 NwaCegarLoop]: 74 mSDtfsCounter, 72 mSDsluCounter, 830 mSDsCounter, 0 mSdLazyCounter, 1180 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s 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, 2.3s IncrementalHoareTripleChecker+Time [2024-11-27 23:36:35,843 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 904 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1180 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-11-27 23:36:35,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3527 states. [2024-11-27 23:36:38,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3527 to 3483. [2024-11-27 23:36:38,373 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) [2024-11-27 23:36:38,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3483 states to 3483 states and 4443 transitions. [2024-11-27 23:36:38,381 INFO L78 Accepts]: Start accepts. Automaton has 3483 states and 4443 transitions. Word has length 197 [2024-11-27 23:36:38,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:36:38,381 INFO L471 AbstractCegarLoop]: Abstraction has 3483 states and 4443 transitions. [2024-11-27 23:36:38,381 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) [2024-11-27 23:36:38,382 INFO L276 IsEmpty]: Start isEmpty. Operand 3483 states and 4443 transitions. [2024-11-27 23:36:38,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2024-11-27 23:36:38,385 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:36:38,385 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] [2024-11-27 23:36:38,395 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-27 23:36:38,589 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-27 23:36:38,590 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:36:38,590 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:36:38,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1454517265, now seen corresponding path program 15 times [2024-11-27 23:36:38,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:36:38,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774101033] [2024-11-27 23:36:38,591 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:36:38,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:36:38,658 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-27 23:36:38,659 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-27 23:36:38,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1007509992] [2024-11-27 23:36:38,664 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:36:38,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:36:38,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:36:38,666 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:36:38,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-27 23:36:38,907 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-27 23:36:38,907 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:36:38,909 INFO L256 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-27 23:36:38,913 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:36:39,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1644 backedges. 146 proven. 1 refuted. 0 times theorem prover too weak. 1497 trivial. 0 not checked. [2024-11-27 23:36:39,570 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:36:40,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1644 backedges. 140 proven. 7 refuted. 0 times theorem prover too weak. 1497 trivial. 0 not checked. [2024-11-27 23:36:40,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:36:40,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774101033] [2024-11-27 23:36:40,123 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:36:40,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007509992] [2024-11-27 23:36:40,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007509992] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:36:40,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:36:40,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2024-11-27 23:36:40,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227500462] [2024-11-27 23:36:40,124 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:36:40,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-27 23:36:40,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:36:40,125 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-27 23:36:40,125 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2024-11-27 23:36:40,125 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) [2024-11-27 23:36:42,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:36:42,821 INFO L93 Difference]: Finished difference Result 3501 states and 4460 transitions. [2024-11-27 23:36:42,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-27 23:36:42,822 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 [2024-11-27 23:36:42,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:36:42,833 INFO L225 Difference]: With dead ends: 3501 [2024-11-27 23:36:42,834 INFO L226 Difference]: Without dead ends: 3499 [2024-11-27 23:36:42,835 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 [2024-11-27 23:36:42,836 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 [2024-11-27 23:36:42,836 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] [2024-11-27 23:36:42,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3499 states. [2024-11-27 23:36:45,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3499 to 3499. [2024-11-27 23:36:45,092 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) [2024-11-27 23:36:45,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3499 states to 3499 states and 4455 transitions. [2024-11-27 23:36:45,099 INFO L78 Accepts]: Start accepts. Automaton has 3499 states and 4455 transitions. Word has length 197 [2024-11-27 23:36:45,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:36:45,100 INFO L471 AbstractCegarLoop]: Abstraction has 3499 states and 4455 transitions. [2024-11-27 23:36:45,100 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) [2024-11-27 23:36:45,100 INFO L276 IsEmpty]: Start isEmpty. Operand 3499 states and 4455 transitions. [2024-11-27 23:36:45,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2024-11-27 23:36:45,103 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:36:45,103 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] [2024-11-27 23:36:45,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-11-27 23:36:45,303 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-27 23:36:45,303 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:36:45,303 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:36:45,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1687487526, now seen corresponding path program 4 times [2024-11-27 23:36:45,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:36:45,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854860607] [2024-11-27 23:36:45,304 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:36:45,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:36:45,345 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:36:45,345 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-27 23:36:45,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1407096195] [2024-11-27 23:36:45,351 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:36:45,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:36:45,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:36:45,354 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:36:45,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-27 23:36:45,483 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:36:45,483 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:36:45,486 INFO L256 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-11-27 23:36:45,490 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:36:48,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1749 backedges. 133 proven. 170 refuted. 0 times theorem prover too weak. 1446 trivial. 0 not checked. [2024-11-27 23:36:48,118 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:36:50,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:36:50,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854860607] [2024-11-27 23:36:50,637 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:36:50,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407096195] [2024-11-27 23:36:50,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407096195] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:36:50,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-27 23:36:50,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-11-27 23:36:50,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760127051] [2024-11-27 23:36:50,638 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-27 23:36:50,638 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-27 23:36:50,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:36:50,639 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-27 23:36:50,639 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2024-11-27 23:36:50,640 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) [2024-11-27 23:36:58,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:36:58,799 INFO L93 Difference]: Finished difference Result 3581 states and 4542 transitions. [2024-11-27 23:36:58,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-27 23:36:58,799 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 [2024-11-27 23:36:58,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:36:58,806 INFO L225 Difference]: With dead ends: 3581 [2024-11-27 23:36:58,807 INFO L226 Difference]: Without dead ends: 3576 [2024-11-27 23:36:58,808 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=165, Invalid=1395, Unknown=0, NotChecked=0, Total=1560 [2024-11-27 23:36:58,808 INFO L435 NwaCegarLoop]: 73 mSDtfsCounter, 67 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 1321 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s 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, 4.7s IncrementalHoareTripleChecker+Time [2024-11-27 23:36:58,808 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 798 Invalid, 1365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1321 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2024-11-27 23:36:58,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3576 states. [2024-11-27 23:37:00,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3576 to 3540. [2024-11-27 23:37:00,959 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) [2024-11-27 23:37:00,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3540 states to 3540 states and 4484 transitions. [2024-11-27 23:37:00,967 INFO L78 Accepts]: Start accepts. Automaton has 3540 states and 4484 transitions. Word has length 199 [2024-11-27 23:37:00,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:37:00,967 INFO L471 AbstractCegarLoop]: Abstraction has 3540 states and 4484 transitions. [2024-11-27 23:37:00,967 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) [2024-11-27 23:37:00,967 INFO L276 IsEmpty]: Start isEmpty. Operand 3540 states and 4484 transitions. [2024-11-27 23:37:00,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2024-11-27 23:37:00,969 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:37:00,969 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] [2024-11-27 23:37:00,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-11-27 23:37:01,169 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-27 23:37:01,170 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:37:01,170 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:37:01,170 INFO L85 PathProgramCache]: Analyzing trace with hash 164659998, now seen corresponding path program 5 times [2024-11-27 23:37:01,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:37:01,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306065259] [2024-11-27 23:37:01,170 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 23:37:01,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:37:01,209 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-27 23:37:01,209 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-27 23:37:01,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1805091139] [2024-11-27 23:37:01,211 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 23:37:01,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:37:01,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:37:01,215 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:37:01,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-27 23:37:01,603 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-27 23:37:01,603 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:37:01,606 INFO L256 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-27 23:37:01,608 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:37:06,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1760 backedges. 123 proven. 257 refuted. 0 times theorem prover too weak. 1380 trivial. 0 not checked. [2024-11-27 23:37:06,748 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:37:10,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:37:10,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306065259] [2024-11-27 23:37:10,960 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:37:10,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805091139] [2024-11-27 23:37:10,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805091139] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:37:10,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-27 23:37:10,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-11-27 23:37:10,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346580134] [2024-11-27 23:37:10,961 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-27 23:37:10,961 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-27 23:37:10,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:37:10,962 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-27 23:37:10,962 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2024-11-27 23:37:10,962 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) [2024-11-27 23:37:23,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:37:23,813 INFO L93 Difference]: Finished difference Result 3591 states and 4553 transitions. [2024-11-27 23:37:23,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-27 23:37:23,814 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 [2024-11-27 23:37:23,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:37:23,821 INFO L225 Difference]: With dead ends: 3591 [2024-11-27 23:37:23,821 INFO L226 Difference]: Without dead ends: 3584 [2024-11-27 23:37:23,822 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=154, Invalid=1328, Unknown=0, NotChecked=0, Total=1482 [2024-11-27 23:37:23,823 INFO L435 NwaCegarLoop]: 82 mSDtfsCounter, 56 mSDsluCounter, 1122 mSDsCounter, 0 mSdLazyCounter, 1102 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s 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, 8.3s IncrementalHoareTripleChecker+Time [2024-11-27 23:37:23,823 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 1204 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1102 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2024-11-27 23:37:23,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3584 states. [2024-11-27 23:37:26,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3584 to 3540. [2024-11-27 23:37:26,039 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) [2024-11-27 23:37:26,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3540 states to 3540 states and 4482 transitions. [2024-11-27 23:37:26,048 INFO L78 Accepts]: Start accepts. Automaton has 3540 states and 4482 transitions. Word has length 203 [2024-11-27 23:37:26,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:37:26,048 INFO L471 AbstractCegarLoop]: Abstraction has 3540 states and 4482 transitions. [2024-11-27 23:37:26,049 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) [2024-11-27 23:37:26,049 INFO L276 IsEmpty]: Start isEmpty. Operand 3540 states and 4482 transitions. [2024-11-27 23:37:26,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2024-11-27 23:37:26,052 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:37:26,052 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] [2024-11-27 23:37:26,055 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-27 23:37:26,252 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-27 23:37:26,252 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:37:26,253 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:37:26,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1372565351, now seen corresponding path program 16 times [2024-11-27 23:37:26,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:37:26,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709649822] [2024-11-27 23:37:26,253 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:37:26,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:37:26,287 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:37:26,287 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-27 23:37:26,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1625079901] [2024-11-27 23:37:26,289 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:37:26,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:37:26,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:37:26,291 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:37:26,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-27 23:37:26,427 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:37:26,427 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:37:26,430 INFO L256 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 77 conjuncts are in the unsatisfiable core [2024-11-27 23:37:26,435 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:37:28,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 137 proven. 211 refuted. 0 times theorem prover too weak. 1668 trivial. 0 not checked. [2024-11-27 23:37:28,427 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:37:32,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 155 proven. 184 refuted. 0 times theorem prover too weak. 1677 trivial. 0 not checked. [2024-11-27 23:37:32,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:37:32,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709649822] [2024-11-27 23:37:32,590 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:37:32,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625079901] [2024-11-27 23:37:32,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625079901] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:37:32,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:37:32,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 36 [2024-11-27 23:37:32,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952288439] [2024-11-27 23:37:32,590 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:37:32,591 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-27 23:37:32,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:37:32,592 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-27 23:37:32,593 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1038, Unknown=0, NotChecked=0, Total=1260 [2024-11-27 23:37:32,593 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) [2024-11-27 23:37:49,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:37:49,377 INFO L93 Difference]: Finished difference Result 3897 states and 5046 transitions. [2024-11-27 23:37:49,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-27 23:37:49,378 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 [2024-11-27 23:37:49,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:37:49,390 INFO L225 Difference]: With dead ends: 3897 [2024-11-27 23:37:49,391 INFO L226 Difference]: Without dead ends: 3893 [2024-11-27 23:37:49,393 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 [2024-11-27 23:37:49,394 INFO L435 NwaCegarLoop]: 94 mSDtfsCounter, 175 mSDsluCounter, 1747 mSDsCounter, 0 mSdLazyCounter, 1847 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s 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, 7.5s IncrementalHoareTripleChecker+Time [2024-11-27 23:37:49,394 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 1841 Invalid, 2041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 1847 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2024-11-27 23:37:49,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3893 states. [2024-11-27 23:37:52,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3893 to 3767. [2024-11-27 23:37:52,271 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) [2024-11-27 23:37:52,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3767 states to 3767 states and 4873 transitions. [2024-11-27 23:37:52,280 INFO L78 Accepts]: Start accepts. Automaton has 3767 states and 4873 transitions. Word has length 211 [2024-11-27 23:37:52,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:37:52,280 INFO L471 AbstractCegarLoop]: Abstraction has 3767 states and 4873 transitions. [2024-11-27 23:37:52,280 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) [2024-11-27 23:37:52,281 INFO L276 IsEmpty]: Start isEmpty. Operand 3767 states and 4873 transitions. [2024-11-27 23:37:52,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2024-11-27 23:37:52,283 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:37:52,283 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] [2024-11-27 23:37:52,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-11-27 23:37:52,484 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-27 23:37:52,484 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:37:52,484 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:37:52,485 INFO L85 PathProgramCache]: Analyzing trace with hash -927292509, now seen corresponding path program 17 times [2024-11-27 23:37:52,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:37:52,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78143397] [2024-11-27 23:37:52,485 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 23:37:52,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:37:52,520 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-27 23:37:52,520 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-27 23:37:52,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2131464915] [2024-11-27 23:37:52,522 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 23:37:52,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:37:52,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:37:52,525 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:37:52,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-27 23:37:52,761 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-27 23:37:52,761 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:37:52,764 INFO L256 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-11-27 23:37:52,770 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:38:23,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2027 backedges. 151 proven. 280 refuted. 0 times theorem prover too weak. 1596 trivial. 0 not checked. [2024-11-27 23:38:23,192 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:38:26,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:38:26,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78143397] [2024-11-27 23:38:26,006 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:38:26,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131464915] [2024-11-27 23:38:26,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131464915] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:38:26,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-27 23:38:26,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-11-27 23:38:26,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220687870] [2024-11-27 23:38:26,006 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-27 23:38:26,007 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-27 23:38:26,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:38:26,007 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-27 23:38:26,007 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2024-11-27 23:38:26,008 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) [2024-11-27 23:38:32,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.75s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-27 23:38:44,913 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] [2024-11-27 23:38:46,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:38:46,239 INFO L93 Difference]: Finished difference Result 3865 states and 4989 transitions. [2024-11-27 23:38:46,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-27 23:38:46,240 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 [2024-11-27 23:38:46,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:38:46,247 INFO L225 Difference]: With dead ends: 3865 [2024-11-27 23:38:46,248 INFO L226 Difference]: Without dead ends: 3861 [2024-11-27 23:38:46,249 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=158, Invalid=1324, Unknown=0, NotChecked=0, Total=1482 [2024-11-27 23:38:46,249 INFO L435 NwaCegarLoop]: 83 mSDtfsCounter, 54 mSDsluCounter, 1310 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 46 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 1393 SdHoareTripleChecker+Invalid, 1246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.5s IncrementalHoareTripleChecker+Time [2024-11-27 23:38:46,249 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 1393 Invalid, 1246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1199 Invalid, 1 Unknown, 0 Unchecked, 14.5s Time] [2024-11-27 23:38:46,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3861 states. [2024-11-27 23:38:49,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3861 to 3821. [2024-11-27 23:38:49,157 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) [2024-11-27 23:38:49,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3821 states to 3821 states and 4936 transitions. [2024-11-27 23:38:49,167 INFO L78 Accepts]: Start accepts. Automaton has 3821 states and 4936 transitions. Word has length 215 [2024-11-27 23:38:49,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:38:49,167 INFO L471 AbstractCegarLoop]: Abstraction has 3821 states and 4936 transitions. [2024-11-27 23:38:49,167 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) [2024-11-27 23:38:49,167 INFO L276 IsEmpty]: Start isEmpty. Operand 3821 states and 4936 transitions. [2024-11-27 23:38:49,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2024-11-27 23:38:49,172 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:38:49,172 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] [2024-11-27 23:38:49,181 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-11-27 23:38:49,376 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-27 23:38:49,377 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:38:49,377 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:38:49,377 INFO L85 PathProgramCache]: Analyzing trace with hash 2041908630, now seen corresponding path program 6 times [2024-11-27 23:38:49,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:38:49,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870064768] [2024-11-27 23:38:49,377 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 23:38:49,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:38:49,416 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2024-11-27 23:38:49,417 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-27 23:38:49,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1696278825] [2024-11-27 23:38:49,418 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 23:38:49,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:38:49,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:38:49,422 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:38:49,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-27 23:38:49,636 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-11-27 23:38:49,636 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:38:49,639 INFO L256 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-11-27 23:38:49,644 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:38:51,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 212 proven. 202 refuted. 0 times theorem prover too weak. 1864 trivial. 0 not checked. [2024-11-27 23:38:51,928 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:39:00,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:39:00,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870064768] [2024-11-27 23:39:00,910 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:39:00,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696278825] [2024-11-27 23:39:00,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696278825] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:39:00,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-27 23:39:00,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-11-27 23:39:00,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226017104] [2024-11-27 23:39:00,910 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-27 23:39:00,910 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-27 23:39:00,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:39:00,911 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-27 23:39:00,911 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=647, Unknown=2, NotChecked=0, Total=756 [2024-11-27 23:39:00,911 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) [2024-11-27 23:39:05,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:39:05,719 INFO L93 Difference]: Finished difference Result 3924 states and 5022 transitions. [2024-11-27 23:39:05,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-27 23:39:05,720 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 [2024-11-27 23:39:05,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:39:05,733 INFO L225 Difference]: With dead ends: 3924 [2024-11-27 23:39:05,733 INFO L226 Difference]: Without dead ends: 3917 [2024-11-27 23:39:05,734 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=145, Invalid=783, Unknown=2, NotChecked=0, Total=930 [2024-11-27 23:39:05,734 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 39 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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, 1.4s IncrementalHoareTripleChecker+Time [2024-11-27 23:39:05,735 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 559 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-27 23:39:05,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3917 states. [2024-11-27 23:39:08,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3917 to 3779. [2024-11-27 23:39:08,806 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) [2024-11-27 23:39:08,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3779 states to 3779 states and 4837 transitions. [2024-11-27 23:39:08,814 INFO L78 Accepts]: Start accepts. Automaton has 3779 states and 4837 transitions. Word has length 222 [2024-11-27 23:39:08,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:39:08,815 INFO L471 AbstractCegarLoop]: Abstraction has 3779 states and 4837 transitions. [2024-11-27 23:39:08,815 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) [2024-11-27 23:39:08,815 INFO L276 IsEmpty]: Start isEmpty. Operand 3779 states and 4837 transitions. [2024-11-27 23:39:08,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2024-11-27 23:39:08,818 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:39:08,818 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] [2024-11-27 23:39:08,827 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-11-27 23:39:09,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:39:09,018 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:39:09,019 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:39:09,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1819384274, now seen corresponding path program 7 times [2024-11-27 23:39:09,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:39:09,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889115448] [2024-11-27 23:39:09,019 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 23:39:09,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:39:09,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-27 23:39:09,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1246585869] [2024-11-27 23:39:09,043 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 23:39:09,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:39:09,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:39:09,047 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:39:09,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-27 23:39:09,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:39:09,249 INFO L256 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 93 conjuncts are in the unsatisfiable core [2024-11-27 23:39:09,254 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:39:11,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2289 backedges. 179 proven. 291 refuted. 0 times theorem prover too weak. 1819 trivial. 0 not checked. [2024-11-27 23:39:11,727 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:39:16,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:39:16,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889115448] [2024-11-27 23:39:16,473 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:39:16,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246585869] [2024-11-27 23:39:16,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246585869] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:39:16,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-27 23:39:16,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-11-27 23:39:16,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184403920] [2024-11-27 23:39:16,473 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-27 23:39:16,473 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-27 23:39:16,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:39:16,474 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-27 23:39:16,474 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2024-11-27 23:39:16,475 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) [2024-11-27 23:39:21,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:39:21,656 INFO L93 Difference]: Finished difference Result 3856 states and 4949 transitions. [2024-11-27 23:39:21,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-27 23:39:21,657 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 [2024-11-27 23:39:21,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:39:21,670 INFO L225 Difference]: With dead ends: 3856 [2024-11-27 23:39:21,670 INFO L226 Difference]: Without dead ends: 3851 [2024-11-27 23:39:21,672 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=268, Invalid=1894, Unknown=0, NotChecked=0, Total=2162 [2024-11-27 23:39:21,672 INFO L435 NwaCegarLoop]: 82 mSDtfsCounter, 77 mSDsluCounter, 1209 mSDsCounter, 0 mSdLazyCounter, 1458 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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 [2024-11-27 23:39:21,673 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] [2024-11-27 23:39:21,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3851 states. [2024-11-27 23:39:24,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3851 to 3775. [2024-11-27 23:39:24,890 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) [2024-11-27 23:39:24,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3775 states to 3775 states and 4832 transitions. [2024-11-27 23:39:24,899 INFO L78 Accepts]: Start accepts. Automaton has 3775 states and 4832 transitions. Word has length 226 [2024-11-27 23:39:24,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:39:24,899 INFO L471 AbstractCegarLoop]: Abstraction has 3775 states and 4832 transitions. [2024-11-27 23:39:24,899 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) [2024-11-27 23:39:24,899 INFO L276 IsEmpty]: Start isEmpty. Operand 3775 states and 4832 transitions. [2024-11-27 23:39:24,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2024-11-27 23:39:24,902 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:39:24,902 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] [2024-11-27 23:39:24,909 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-11-27 23:39:25,102 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:39:25,103 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:39:25,103 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:39:25,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1210475738, now seen corresponding path program 8 times [2024-11-27 23:39:25,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:39:25,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859092777] [2024-11-27 23:39:25,103 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:39:25,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:39:25,127 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:39:25,128 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-27 23:39:25,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1999512256] [2024-11-27 23:39:25,129 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:39:25,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:39:25,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:39:25,132 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:39:25,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-27 23:39:25,303 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:39:25,303 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:39:25,307 INFO L256 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 88 conjuncts are in the unsatisfiable core [2024-11-27 23:39:25,312 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:39:27,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2289 backedges. 153 proven. 230 refuted. 0 times theorem prover too weak. 1906 trivial. 0 not checked. [2024-11-27 23:39:27,611 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:39:28,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:39:28,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859092777] [2024-11-27 23:39:28,178 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:39:28,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999512256] [2024-11-27 23:39:28,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999512256] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:39:28,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-27 23:39:28,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-11-27 23:39:28,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629251306] [2024-11-27 23:39:28,178 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-27 23:39:28,179 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-27 23:39:28,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:39:28,179 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-27 23:39:28,180 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2024-11-27 23:39:28,180 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) [2024-11-27 23:39:33,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:39:33,390 INFO L93 Difference]: Finished difference Result 3875 states and 4948 transitions. [2024-11-27 23:39:33,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-27 23:39:33,391 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 [2024-11-27 23:39:33,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:39:33,398 INFO L225 Difference]: With dead ends: 3875 [2024-11-27 23:39:33,398 INFO L226 Difference]: Without dead ends: 3870 [2024-11-27 23:39:33,400 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=191, Invalid=1449, Unknown=0, NotChecked=0, Total=1640 [2024-11-27 23:39:33,400 INFO L435 NwaCegarLoop]: 80 mSDtfsCounter, 80 mSDsluCounter, 1325 mSDsCounter, 0 mSdLazyCounter, 1549 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s 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, 1.3s IncrementalHoareTripleChecker+Time [2024-11-27 23:39:33,400 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 1405 Invalid, 1605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1549 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-27 23:39:33,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3870 states. [2024-11-27 23:39:36,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3870 to 3858. [2024-11-27 23:39:36,516 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) [2024-11-27 23:39:36,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3858 states to 3858 states and 4931 transitions. [2024-11-27 23:39:36,523 INFO L78 Accepts]: Start accepts. Automaton has 3858 states and 4931 transitions. Word has length 226 [2024-11-27 23:39:36,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:39:36,524 INFO L471 AbstractCegarLoop]: Abstraction has 3858 states and 4931 transitions. [2024-11-27 23:39:36,524 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) [2024-11-27 23:39:36,524 INFO L276 IsEmpty]: Start isEmpty. Operand 3858 states and 4931 transitions. [2024-11-27 23:39:36,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2024-11-27 23:39:36,528 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:39:36,528 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] [2024-11-27 23:39:36,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-11-27 23:39:36,728 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:39:36,728 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:39:36,729 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:39:36,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1144300062, now seen corresponding path program 9 times [2024-11-27 23:39:36,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:39:36,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588988449] [2024-11-27 23:39:36,729 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:39:36,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:39:36,847 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-27 23:39:36,847 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-27 23:39:36,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [118613239] [2024-11-27 23:39:36,849 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:39:36,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:39:36,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:39:36,852 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:39:36,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-27 23:39:37,082 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-27 23:39:37,082 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:39:37,084 INFO L256 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 90 conjuncts are in the unsatisfiable core [2024-11-27 23:39:37,088 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:39:39,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2289 backedges. 245 proven. 200 refuted. 0 times theorem prover too weak. 1844 trivial. 0 not checked. [2024-11-27 23:39:39,873 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:39:49,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:39:49,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588988449] [2024-11-27 23:39:49,886 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:39:49,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118613239] [2024-11-27 23:39:49,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118613239] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:39:49,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-27 23:39:49,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-11-27 23:39:49,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991526105] [2024-11-27 23:39:49,887 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-27 23:39:49,887 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-27 23:39:49,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:39:49,888 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-27 23:39:49,888 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=853, Unknown=2, NotChecked=0, Total=992 [2024-11-27 23:39:49,889 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) [2024-11-27 23:39:57,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:39:57,848 INFO L93 Difference]: Finished difference Result 4434 states and 5704 transitions. [2024-11-27 23:39:57,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-27 23:39:57,849 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 [2024-11-27 23:39:57,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:39:57,859 INFO L225 Difference]: With dead ends: 4434 [2024-11-27 23:39:57,859 INFO L226 Difference]: Without dead ends: 4427 [2024-11-27 23:39:57,861 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=218, Invalid=1262, Unknown=2, NotChecked=0, Total=1482 [2024-11-27 23:39:57,861 INFO L435 NwaCegarLoop]: 77 mSDtfsCounter, 56 mSDsluCounter, 983 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s 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, 3.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:39:57,861 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 1060 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 949 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-11-27 23:39:57,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4427 states. [2024-11-27 23:40:02,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4427 to 4284. [2024-11-27 23:40:02,465 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) [2024-11-27 23:40:02,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4284 states to 4284 states and 5505 transitions. [2024-11-27 23:40:02,477 INFO L78 Accepts]: Start accepts. Automaton has 4284 states and 5505 transitions. Word has length 226 [2024-11-27 23:40:02,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:40:02,477 INFO L471 AbstractCegarLoop]: Abstraction has 4284 states and 5505 transitions. [2024-11-27 23:40:02,477 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) [2024-11-27 23:40:02,477 INFO L276 IsEmpty]: Start isEmpty. Operand 4284 states and 5505 transitions. [2024-11-27 23:40:02,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2024-11-27 23:40:02,483 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:40:02,483 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] [2024-11-27 23:40:02,496 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-11-27 23:40:02,683 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:40:02,684 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:40:02,684 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:40:02,684 INFO L85 PathProgramCache]: Analyzing trace with hash -355263377, now seen corresponding path program 18 times [2024-11-27 23:40:02,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:40:02,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127294407] [2024-11-27 23:40:02,684 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 23:40:02,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:40:02,735 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-11-27 23:40:02,735 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-27 23:40:02,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1989305530] [2024-11-27 23:40:02,737 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 23:40:02,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:40:02,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:40:02,739 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:40:02,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-27 23:40:03,521 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-27 23:40:03,522 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:40:03,524 INFO L256 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-11-27 23:40:03,529 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:40:06,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2593 backedges. 399 proven. 248 refuted. 0 times theorem prover too weak. 1946 trivial. 0 not checked. [2024-11-27 23:40:06,544 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:40:11,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:40:11,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127294407] [2024-11-27 23:40:11,696 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:40:11,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989305530] [2024-11-27 23:40:11,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989305530] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:40:11,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-27 23:40:11,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-11-27 23:40:11,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050288743] [2024-11-27 23:40:11,696 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-27 23:40:11,697 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-27 23:40:11,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:40:11,697 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-27 23:40:11,697 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=596, Unknown=1, NotChecked=0, Total=702 [2024-11-27 23:40:11,697 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) [2024-11-27 23:40:16,313 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] [2024-11-27 23:40:24,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-27 23:40:28,390 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-27 23:40:32,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-27 23:40:36,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-27 23:40:40,467 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-27 23:40:48,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-27 23:40:52,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-27 23:41:05,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-27 23:41:18,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-27 23:41:22,363 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-27 23:41:26,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-27 23:41:35,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.48s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-27 23:41:39,722 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-27 23:41:43,882 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-27 23:41:54,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-27 23:41:59,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-27 23:42:03,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-27 23:42:07,552 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-27 23:42:28,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-27 23:42:32,328 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-27 23:42:36,405 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-27 23:42:40,432 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-27 23:42:44,864 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-27 23:42:48,952 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-27 23:42:53,059 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-27 23:43:16,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-27 23:43:20,540 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-27 23:43:25,244 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-27 23:43:50,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.23s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-27 23:44:08,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-27 23:44:12,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-27 23:44:14,388 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-27 23:44:18,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-27 23:44:22,792 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.28s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-27 23:44:26,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-27 23:45:07,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-27 23:45:12,325 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-27 23:45:16,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-27 23:45:33,636 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-27 23:45:38,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-27 23:45:42,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-27 23:45:46,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-27 23:45:50,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-27 23:45:55,903 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.74s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-27 23:46:00,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-27 23:46:04,531 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.22s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-27 23:46:08,712 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-27 23:46:13,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.15s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-27 23:46:17,504 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] [2024-11-27 23:46:20,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:46:20,656 INFO L93 Difference]: Finished difference Result 4603 states and 5962 transitions. [2024-11-27 23:46:20,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-27 23:46:20,656 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 [2024-11-27 23:46:20,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:46:20,667 INFO L225 Difference]: With dead ends: 4603 [2024-11-27 23:46:20,667 INFO L226 Difference]: Without dead ends: 4599 [2024-11-27 23:46:20,668 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 162.9s TimeCoverageRelationStatistics Valid=366, Invalid=1490, Unknown=36, NotChecked=0, Total=1892 [2024-11-27 23:46:20,669 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 53 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 36 mSolverCounterUnsat, 49 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 205.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 49 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 207.9s IncrementalHoareTripleChecker+Time [2024-11-27 23:46:20,669 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 531 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 708 Invalid, 49 Unknown, 0 Unchecked, 207.9s Time] [2024-11-27 23:46:20,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4599 states. [2024-11-27 23:46:24,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4599 to 4462. [2024-11-27 23:46:24,746 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) [2024-11-27 23:46:24,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4462 states to 4462 states and 5750 transitions. [2024-11-27 23:46:24,756 INFO L78 Accepts]: Start accepts. Automaton has 4462 states and 5750 transitions. Word has length 238 [2024-11-27 23:46:24,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:46:24,756 INFO L471 AbstractCegarLoop]: Abstraction has 4462 states and 5750 transitions. [2024-11-27 23:46:24,756 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) [2024-11-27 23:46:24,756 INFO L276 IsEmpty]: Start isEmpty. Operand 4462 states and 5750 transitions. [2024-11-27 23:46:24,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2024-11-27 23:46:24,761 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:46:24,761 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] [2024-11-27 23:46:24,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-11-27 23:46:24,961 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-11-27 23:46:24,961 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:46:24,962 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:46:24,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1311999126, now seen corresponding path program 10 times [2024-11-27 23:46:24,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:46:24,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989226897] [2024-11-27 23:46:24,962 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:46:24,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:46:25,011 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:46:25,012 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-27 23:46:25,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2045447154] [2024-11-27 23:46:25,014 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:46:25,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:46:25,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:46:25,017 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:46:25,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98c82166-485d-4fec-a8a5-a4d615ea9971/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-27 23:46:25,201 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:46:25,202 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:46:25,205 INFO L256 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-11-27 23:46:25,210 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:46:37,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2889 backedges. 211 proven. 347 refuted. 0 times theorem prover too weak. 2331 trivial. 0 not checked. [2024-11-27 23:46:37,536 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:46:46,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:46:46,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989226897] [2024-11-27 23:46:46,247 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:46:46,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045447154] [2024-11-27 23:46:46,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045447154] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:46:46,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-27 23:46:46,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2024-11-27 23:46:46,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775091588] [2024-11-27 23:46:46,248 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-27 23:46:46,248 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-27 23:46:46,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:46:46,249 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-27 23:46:46,249 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=898, Unknown=1, NotChecked=0, Total=992 [2024-11-27 23:46:46,249 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)