./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound100.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya --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 83ea03e3a970ed9a04e84a7095cded72c8faa028a8061c6de69ab7c540d420f5 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 05:20:01,953 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 05:20:02,030 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 05:20:02,036 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 05:20:02,037 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 05:20:02,062 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 05:20:02,062 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 05:20:02,063 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 05:20:02,064 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 05:20:02,064 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 05:20:02,065 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 05:20:02,065 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 05:20:02,066 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 05:20:02,066 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 05:20:02,067 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 05:20:02,067 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 05:20:02,068 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 05:20:02,068 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 05:20:02,069 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 05:20:02,069 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 05:20:02,070 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 05:20:02,075 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 05:20:02,076 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 05:20:02,076 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 05:20:02,076 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 05:20:02,077 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 05:20:02,077 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 05:20:02,078 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 05:20:02,078 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 05:20:02,078 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 05:20:02,079 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 05:20:02,079 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:20:02,080 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 05:20:02,080 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 05:20:02,080 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 05:20:02,080 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 05:20:02,080 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 05:20:02,081 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 05:20:02,081 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 05:20:02,081 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 05:20:02,081 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 05:20:02,082 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 05:20:02,082 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83ea03e3a970ed9a04e84a7095cded72c8faa028a8061c6de69ab7c540d420f5 [2023-11-29 05:20:02,307 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 05:20:02,329 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 05:20:02,332 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 05:20:02,334 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 05:20:02,334 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 05:20:02,335 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound100.c [2023-11-29 05:20:05,119 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 05:20:05,309 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 05:20:05,310 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound100.c [2023-11-29 05:20:05,316 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/data/279c033a0/303f3d8d951342f58375d20accfe2024/FLAGab5479ce2 [2023-11-29 05:20:05,328 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/data/279c033a0/303f3d8d951342f58375d20accfe2024 [2023-11-29 05:20:05,331 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 05:20:05,332 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 05:20:05,334 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 05:20:05,334 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 05:20:05,338 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 05:20:05,339 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:20:05" (1/1) ... [2023-11-29 05:20:05,340 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fd57e0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:20:05, skipping insertion in model container [2023-11-29 05:20:05,340 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:20:05" (1/1) ... [2023-11-29 05:20:05,362 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 05:20:05,497 WARN L240 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_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound100.c[526,539] [2023-11-29 05:20:05,515 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:20:05,526 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 05:20:05,540 WARN L240 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_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound100.c[526,539] [2023-11-29 05:20:05,546 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:20:05,560 INFO L206 MainTranslator]: Completed translation [2023-11-29 05:20:05,560 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:20:05 WrapperNode [2023-11-29 05:20:05,561 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 05:20:05,562 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 05:20:05,562 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 05:20:05,562 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 05:20:05,570 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:20:05" (1/1) ... [2023-11-29 05:20:05,576 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:20:05" (1/1) ... [2023-11-29 05:20:05,597 INFO L138 Inliner]: procedures = 14, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2023-11-29 05:20:05,597 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 05:20:05,598 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 05:20:05,598 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 05:20:05,598 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 05:20:05,608 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:20:05" (1/1) ... [2023-11-29 05:20:05,608 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:20:05" (1/1) ... [2023-11-29 05:20:05,609 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:20:05" (1/1) ... [2023-11-29 05:20:05,621 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8]. The 0 writes are split as follows [0, 0]. [2023-11-29 05:20:05,622 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:20:05" (1/1) ... [2023-11-29 05:20:05,622 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:20:05" (1/1) ... [2023-11-29 05:20:05,625 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:20:05" (1/1) ... [2023-11-29 05:20:05,629 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:20:05" (1/1) ... [2023-11-29 05:20:05,630 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:20:05" (1/1) ... [2023-11-29 05:20:05,631 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:20:05" (1/1) ... [2023-11-29 05:20:05,634 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 05:20:05,634 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 05:20:05,635 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 05:20:05,635 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 05:20:05,636 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:20:05" (1/1) ... [2023-11-29 05:20:05,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:20:05,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:20:05,665 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 05:20:05,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 05:20:05,704 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 05:20:05,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 05:20:05,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 05:20:05,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 05:20:05,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 05:20:05,705 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-29 05:20:05,705 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-29 05:20:05,764 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 05:20:05,766 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 05:20:05,910 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 05:20:05,940 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 05:20:05,940 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-29 05:20:05,941 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:20:05 BoogieIcfgContainer [2023-11-29 05:20:05,941 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 05:20:05,944 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 05:20:05,945 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 05:20:05,947 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 05:20:05,947 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 05:20:05" (1/3) ... [2023-11-29 05:20:05,948 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e3b2e61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:20:05, skipping insertion in model container [2023-11-29 05:20:05,948 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:20:05" (2/3) ... [2023-11-29 05:20:05,949 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e3b2e61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:20:05, skipping insertion in model container [2023-11-29 05:20:05,949 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:20:05" (3/3) ... [2023-11-29 05:20:05,950 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound100.c [2023-11-29 05:20:05,966 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 05:20:05,967 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 05:20:06,011 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 05:20:06,018 INFO L357 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, mHoare=true, 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;@5c15d797, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 05:20:06,018 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 05:20:06,022 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 14 states have internal predecessors, (22), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 05:20:06,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-29 05:20:06,028 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:20:06,029 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:20:06,030 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:20:06,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:20:06,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1291730102, now seen corresponding path program 1 times [2023-11-29 05:20:06,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:20:06,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590468774] [2023-11-29 05:20:06,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:20:06,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:20:06,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:20:06,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:20:06,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590468774] [2023-11-29 05:20:06,153 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 05:20:06,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582414647] [2023-11-29 05:20:06,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:20:06,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:20:06,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:20:06,160 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:20:06,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 05:20:06,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:20:06,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 05:20:06,230 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:20:06,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:20:06,247 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:20:06,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582414647] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:20:06,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:20:06,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:20:06,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586644748] [2023-11-29 05:20:06,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:20:06,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 05:20:06,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:20:06,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 05:20:06,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 05:20:06,282 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 14 states have internal predecessors, (22), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:06,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:20:06,307 INFO L93 Difference]: Finished difference Result 45 states and 78 transitions. [2023-11-29 05:20:06,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 05:20:06,310 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-29 05:20:06,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:20:06,318 INFO L225 Difference]: With dead ends: 45 [2023-11-29 05:20:06,318 INFO L226 Difference]: Without dead ends: 21 [2023-11-29 05:20:06,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 05:20:06,325 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:20:06,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:20:06,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-29 05:20:06,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-29 05:20:06,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 05:20:06,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 31 transitions. [2023-11-29 05:20:06,398 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 31 transitions. Word has length 7 [2023-11-29 05:20:06,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:20:06,398 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 31 transitions. [2023-11-29 05:20:06,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:06,401 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 31 transitions. [2023-11-29 05:20:06,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-29 05:20:06,403 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:20:06,403 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:20:06,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 05:20:06,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-29 05:20:06,610 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:20:06,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:20:06,611 INFO L85 PathProgramCache]: Analyzing trace with hash 829671692, now seen corresponding path program 1 times [2023-11-29 05:20:06,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:20:06,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357079107] [2023-11-29 05:20:06,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:20:06,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:20:06,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:20:06,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:20:06,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:20:06,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357079107] [2023-11-29 05:20:06,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357079107] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:20:06,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:20:06,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:20:06,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362502757] [2023-11-29 05:20:06,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:20:06,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:20:06,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:20:06,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:20:06,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:20:06,762 INFO L87 Difference]: Start difference. First operand 21 states and 31 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:06,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:20:06,820 INFO L93 Difference]: Finished difference Result 35 states and 50 transitions. [2023-11-29 05:20:06,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:20:06,821 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-29 05:20:06,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:20:06,822 INFO L225 Difference]: With dead ends: 35 [2023-11-29 05:20:06,822 INFO L226 Difference]: Without dead ends: 33 [2023-11-29 05:20:06,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:20:06,824 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 15 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:20:06,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 89 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:20:06,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-11-29 05:20:06,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2023-11-29 05:20:06,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 05:20:06,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2023-11-29 05:20:06,836 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 7 [2023-11-29 05:20:06,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:20:06,836 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2023-11-29 05:20:06,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:06,836 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2023-11-29 05:20:06,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-29 05:20:06,837 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:20:06,837 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:20:06,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 05:20:06,838 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:20:06,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:20:06,839 INFO L85 PathProgramCache]: Analyzing trace with hash -166824855, now seen corresponding path program 1 times [2023-11-29 05:20:06,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:20:06,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24452458] [2023-11-29 05:20:06,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:20:06,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:20:06,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:20:06,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:20:06,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24452458] [2023-11-29 05:20:06,859 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 05:20:06,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999910322] [2023-11-29 05:20:06,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:20:06,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:20:06,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:20:06,861 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:20:06,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 05:20:06,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:20:06,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 05:20:06,923 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:20:06,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:20:06,953 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:20:06,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999910322] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:20:06,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:20:06,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:20:06,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978509027] [2023-11-29 05:20:06,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:20:06,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:20:06,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:20:06,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:20:06,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:20:06,956 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:06,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:20:06,976 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2023-11-29 05:20:06,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:20:06,976 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-29 05:20:06,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:20:06,977 INFO L225 Difference]: With dead ends: 41 [2023-11-29 05:20:06,977 INFO L226 Difference]: Without dead ends: 27 [2023-11-29 05:20:06,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:20:06,979 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:20:06,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 82 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:20:06,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-29 05:20:06,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-11-29 05:20:06,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 05:20:06,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2023-11-29 05:20:06,988 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 9 [2023-11-29 05:20:06,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:20:06,988 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2023-11-29 05:20:06,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:06,988 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2023-11-29 05:20:06,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-29 05:20:06,989 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:20:06,989 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:20:06,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 05:20:07,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:20:07,192 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:20:07,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:20:07,193 INFO L85 PathProgramCache]: Analyzing trace with hash -439138420, now seen corresponding path program 1 times [2023-11-29 05:20:07,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:20:07,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971219744] [2023-11-29 05:20:07,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:20:07,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:20:07,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:20:07,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-29 05:20:07,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:20:07,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:20:07,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:20:07,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971219744] [2023-11-29 05:20:07,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971219744] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:20:07,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:20:07,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:20:07,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010787136] [2023-11-29 05:20:07,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:20:07,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:20:07,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:20:07,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:20:07,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:20:07,294 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 05:20:07,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:20:07,343 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2023-11-29 05:20:07,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:20:07,344 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-11-29 05:20:07,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:20:07,345 INFO L225 Difference]: With dead ends: 41 [2023-11-29 05:20:07,345 INFO L226 Difference]: Without dead ends: 39 [2023-11-29 05:20:07,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:20:07,347 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 13 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:20:07,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 85 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:20:07,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-11-29 05:20:07,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2023-11-29 05:20:07,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 05:20:07,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2023-11-29 05:20:07,355 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 12 [2023-11-29 05:20:07,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:20:07,356 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2023-11-29 05:20:07,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 05:20:07,356 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2023-11-29 05:20:07,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-29 05:20:07,357 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:20:07,357 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:20:07,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 05:20:07,357 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:20:07,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:20:07,358 INFO L85 PathProgramCache]: Analyzing trace with hash -235147060, now seen corresponding path program 1 times [2023-11-29 05:20:07,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:20:07,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224314050] [2023-11-29 05:20:07,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:20:07,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:20:07,368 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:20:07,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1827945157] [2023-11-29 05:20:07,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:20:07,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:20:07,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:20:07,372 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:20:07,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 05:20:07,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:20:07,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 05:20:07,434 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:20:07,557 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:20:07,557 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:20:07,685 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:20:07,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:20:07,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224314050] [2023-11-29 05:20:07,686 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:20:07,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827945157] [2023-11-29 05:20:07,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827945157] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:20:07,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:20:07,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-11-29 05:20:07,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357910731] [2023-11-29 05:20:07,687 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:20:07,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 05:20:07,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:20:07,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 05:20:07,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-29 05:20:07,689 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 12 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 05:20:07,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:20:07,968 INFO L93 Difference]: Finished difference Result 70 states and 95 transitions. [2023-11-29 05:20:07,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:20:07,969 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 17 [2023-11-29 05:20:07,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:20:07,971 INFO L225 Difference]: With dead ends: 70 [2023-11-29 05:20:07,971 INFO L226 Difference]: Without dead ends: 55 [2023-11-29 05:20:07,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-11-29 05:20:07,973 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 40 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:20:07,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 74 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:20:07,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-29 05:20:07,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2023-11-29 05:20:07,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 32 states have (on average 1.28125) internal successors, (41), 35 states have internal predecessors, (41), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-29 05:20:07,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 69 transitions. [2023-11-29 05:20:07,988 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 69 transitions. Word has length 17 [2023-11-29 05:20:07,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:20:07,988 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 69 transitions. [2023-11-29 05:20:07,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 05:20:07,988 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 69 transitions. [2023-11-29 05:20:07,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-29 05:20:07,989 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:20:07,990 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:20:07,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 05:20:08,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:20:08,191 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:20:08,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:20:08,191 INFO L85 PathProgramCache]: Analyzing trace with hash 2012527405, now seen corresponding path program 1 times [2023-11-29 05:20:08,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:20:08,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304865927] [2023-11-29 05:20:08,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:20:08,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:20:08,202 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:20:08,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [657084710] [2023-11-29 05:20:08,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:20:08,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:20:08,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:20:08,204 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:20:08,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 05:20:08,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:20:08,255 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 05:20:08,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:20:08,370 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:20:08,370 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:20:08,537 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:20:08,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:20:08,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304865927] [2023-11-29 05:20:08,538 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:20:08,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657084710] [2023-11-29 05:20:08,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657084710] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:20:08,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:20:08,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-11-29 05:20:08,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883330721] [2023-11-29 05:20:08,539 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:20:08,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 05:20:08,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:20:08,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 05:20:08,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-29 05:20:08,541 INFO L87 Difference]: Start difference. First operand 53 states and 69 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-29 05:20:08,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:20:08,698 INFO L93 Difference]: Finished difference Result 72 states and 96 transitions. [2023-11-29 05:20:08,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:20:08,699 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 25 [2023-11-29 05:20:08,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:20:08,700 INFO L225 Difference]: With dead ends: 72 [2023-11-29 05:20:08,700 INFO L226 Difference]: Without dead ends: 64 [2023-11-29 05:20:08,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-11-29 05:20:08,702 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 23 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:20:08,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 117 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:20:08,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-29 05:20:08,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2023-11-29 05:20:08,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 42 states have internal predecessors, (49), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-29 05:20:08,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 80 transitions. [2023-11-29 05:20:08,718 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 80 transitions. Word has length 25 [2023-11-29 05:20:08,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:20:08,718 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 80 transitions. [2023-11-29 05:20:08,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-29 05:20:08,719 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 80 transitions. [2023-11-29 05:20:08,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-29 05:20:08,720 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:20:08,720 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:20:08,725 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 05:20:08,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:20:08,921 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:20:08,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:20:08,921 INFO L85 PathProgramCache]: Analyzing trace with hash 2049051340, now seen corresponding path program 1 times [2023-11-29 05:20:08,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:20:08,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908835087] [2023-11-29 05:20:08,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:20:08,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:20:08,928 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:20:08,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [751394187] [2023-11-29 05:20:08,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:20:08,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:20:08,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:20:08,930 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:20:08,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 05:20:08,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:20:08,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 05:20:08,981 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:20:09,021 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-29 05:20:09,021 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:20:09,089 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 05:20:09,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:20:09,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908835087] [2023-11-29 05:20:09,090 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:20:09,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751394187] [2023-11-29 05:20:09,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751394187] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:20:09,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:20:09,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-11-29 05:20:09,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130586917] [2023-11-29 05:20:09,091 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:20:09,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:20:09,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:20:09,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:20:09,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:20:09,093 INFO L87 Difference]: Start difference. First operand 61 states and 80 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-29 05:20:09,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:20:09,228 INFO L93 Difference]: Finished difference Result 164 states and 204 transitions. [2023-11-29 05:20:09,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 05:20:09,228 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 32 [2023-11-29 05:20:09,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:20:09,230 INFO L225 Difference]: With dead ends: 164 [2023-11-29 05:20:09,230 INFO L226 Difference]: Without dead ends: 126 [2023-11-29 05:20:09,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-11-29 05:20:09,232 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 34 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:20:09,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 138 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:20:09,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-11-29 05:20:09,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 120. [2023-11-29 05:20:09,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 78 states have (on average 1.1923076923076923) internal successors, (93), 82 states have internal predecessors, (93), 26 states have call successors, (26), 16 states have call predecessors, (26), 15 states have return successors, (24), 21 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-29 05:20:09,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 143 transitions. [2023-11-29 05:20:09,260 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 143 transitions. Word has length 32 [2023-11-29 05:20:09,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:20:09,261 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 143 transitions. [2023-11-29 05:20:09,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-29 05:20:09,261 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 143 transitions. [2023-11-29 05:20:09,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-29 05:20:09,263 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:20:09,263 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:20:09,269 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 05:20:09,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 05:20:09,469 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:20:09,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:20:09,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1125945480, now seen corresponding path program 1 times [2023-11-29 05:20:09,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:20:09,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911673722] [2023-11-29 05:20:09,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:20:09,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:20:09,482 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:20:09,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1589565605] [2023-11-29 05:20:09,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:20:09,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:20:09,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:20:09,483 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:20:09,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 05:20:09,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:20:09,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 05:20:09,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:20:09,622 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-29 05:20:09,622 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:20:09,705 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-11-29 05:20:09,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:20:09,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911673722] [2023-11-29 05:20:09,705 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:20:09,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589565605] [2023-11-29 05:20:09,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589565605] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:20:09,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:20:09,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-11-29 05:20:09,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598403377] [2023-11-29 05:20:09,706 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:20:09,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 05:20:09,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:20:09,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 05:20:09,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-29 05:20:09,708 INFO L87 Difference]: Start difference. First operand 120 states and 143 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-11-29 05:20:09,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:20:09,890 INFO L93 Difference]: Finished difference Result 248 states and 306 transitions. [2023-11-29 05:20:09,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 05:20:09,891 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 48 [2023-11-29 05:20:09,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:20:09,894 INFO L225 Difference]: With dead ends: 248 [2023-11-29 05:20:09,894 INFO L226 Difference]: Without dead ends: 227 [2023-11-29 05:20:09,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-11-29 05:20:09,895 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 80 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:20:09,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 174 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:20:09,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2023-11-29 05:20:09,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 220. [2023-11-29 05:20:09,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 143 states have (on average 1.1958041958041958) internal successors, (171), 154 states have internal predecessors, (171), 51 states have call successors, (51), 26 states have call predecessors, (51), 25 states have return successors, (47), 39 states have call predecessors, (47), 47 states have call successors, (47) [2023-11-29 05:20:09,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 269 transitions. [2023-11-29 05:20:09,933 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 269 transitions. Word has length 48 [2023-11-29 05:20:09,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:20:09,933 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 269 transitions. [2023-11-29 05:20:09,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-11-29 05:20:09,933 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 269 transitions. [2023-11-29 05:20:09,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-29 05:20:09,935 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:20:09,935 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:20:09,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-29 05:20:10,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:20:10,139 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:20:10,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:20:10,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1450073182, now seen corresponding path program 1 times [2023-11-29 05:20:10,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:20:10,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539212194] [2023-11-29 05:20:10,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:20:10,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:20:10,146 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:20:10,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [816791454] [2023-11-29 05:20:10,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:20:10,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:20:10,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:20:10,148 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:20:10,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 05:20:10,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:20:10,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-29 05:20:10,217 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:20:10,549 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-11-29 05:20:10,549 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:20:12,420 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-11-29 05:20:12,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:20:12,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539212194] [2023-11-29 05:20:12,421 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:20:12,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816791454] [2023-11-29 05:20:12,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816791454] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:20:12,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:20:12,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2023-11-29 05:20:12,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898130829] [2023-11-29 05:20:12,431 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:20:12,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 05:20:12,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:20:12,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 05:20:12,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-11-29 05:20:12,433 INFO L87 Difference]: Start difference. First operand 220 states and 269 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2023-11-29 05:20:19,271 WARN L293 SmtUtils]: Spent 6.71s on a formula simplification. DAG size of input: 50 DAG size of output: 48 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 05:20:20,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:20:20,341 INFO L93 Difference]: Finished difference Result 371 states and 478 transitions. [2023-11-29 05:20:20,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 05:20:20,342 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 57 [2023-11-29 05:20:20,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:20:20,346 INFO L225 Difference]: With dead ends: 371 [2023-11-29 05:20:20,346 INFO L226 Difference]: Without dead ends: 298 [2023-11-29 05:20:20,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2023-11-29 05:20:20,348 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 54 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:20:20,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 275 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 05:20:20,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2023-11-29 05:20:20,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 271. [2023-11-29 05:20:20,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 185 states have (on average 1.227027027027027) internal successors, (227), 193 states have internal predecessors, (227), 56 states have call successors, (56), 29 states have call predecessors, (56), 29 states have return successors, (54), 48 states have call predecessors, (54), 54 states have call successors, (54) [2023-11-29 05:20:20,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 337 transitions. [2023-11-29 05:20:20,419 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 337 transitions. Word has length 57 [2023-11-29 05:20:20,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:20:20,419 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 337 transitions. [2023-11-29 05:20:20,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2023-11-29 05:20:20,419 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 337 transitions. [2023-11-29 05:20:20,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-29 05:20:20,422 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:20:20,422 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:20:20,437 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 05:20:20,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:20:20,637 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:20:20,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:20:20,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1715906499, now seen corresponding path program 1 times [2023-11-29 05:20:20,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:20:20,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737903352] [2023-11-29 05:20:20,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:20:20,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:20:20,648 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:20:20,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [194347568] [2023-11-29 05:20:20,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:20:20,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:20:20,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:20:20,649 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:20:20,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 05:20:20,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:20:20,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 05:20:20,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:20:20,992 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 19 proven. 39 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-11-29 05:20:20,992 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:20:21,629 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 19 proven. 39 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-11-29 05:20:21,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:20:21,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737903352] [2023-11-29 05:20:21,629 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:20:21,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194347568] [2023-11-29 05:20:21,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194347568] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:20:21,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:20:21,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2023-11-29 05:20:21,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939877646] [2023-11-29 05:20:21,630 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:20:21,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 05:20:21,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:20:21,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 05:20:21,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2023-11-29 05:20:21,632 INFO L87 Difference]: Start difference. First operand 271 states and 337 transitions. Second operand has 16 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 15 states have internal predecessors, (41), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 5 states have call predecessors, (20), 6 states have call successors, (20) [2023-11-29 05:20:26,031 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 [] [2023-11-29 05:20:26,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:20:26,322 INFO L93 Difference]: Finished difference Result 340 states and 422 transitions. [2023-11-29 05:20:26,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 05:20:26,323 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 15 states have internal predecessors, (41), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 5 states have call predecessors, (20), 6 states have call successors, (20) Word has length 68 [2023-11-29 05:20:26,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:20:26,325 INFO L225 Difference]: With dead ends: 340 [2023-11-29 05:20:26,325 INFO L226 Difference]: Without dead ends: 259 [2023-11-29 05:20:26,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2023-11-29 05:20:26,326 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 32 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 31 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-11-29 05:20:26,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 259 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 243 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2023-11-29 05:20:26,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2023-11-29 05:20:26,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 235. [2023-11-29 05:20:26,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 160 states have (on average 1.18125) internal successors, (189), 164 states have internal predecessors, (189), 46 states have call successors, (46), 29 states have call predecessors, (46), 28 states have return successors, (44), 41 states have call predecessors, (44), 44 states have call successors, (44) [2023-11-29 05:20:26,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 279 transitions. [2023-11-29 05:20:26,389 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 279 transitions. Word has length 68 [2023-11-29 05:20:26,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:20:26,389 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 279 transitions. [2023-11-29 05:20:26,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 15 states have internal predecessors, (41), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 5 states have call predecessors, (20), 6 states have call successors, (20) [2023-11-29 05:20:26,390 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 279 transitions. [2023-11-29 05:20:26,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-29 05:20:26,391 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:20:26,392 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:20:26,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 05:20:26,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 05:20:26,598 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:20:26,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:20:26,598 INFO L85 PathProgramCache]: Analyzing trace with hash 970851771, now seen corresponding path program 1 times [2023-11-29 05:20:26,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:20:26,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088455207] [2023-11-29 05:20:26,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:20:26,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:20:26,607 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:20:26,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [688973236] [2023-11-29 05:20:26,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:20:26,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:20:26,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:20:26,608 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:20:26,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 05:20:26,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:20:26,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 05:20:26,672 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:20:26,837 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-11-29 05:20:26,837 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:20:27,259 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-11-29 05:20:27,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:20:27,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088455207] [2023-11-29 05:20:27,259 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:20:27,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688973236] [2023-11-29 05:20:27,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688973236] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:20:27,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:20:27,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-29 05:20:27,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454826988] [2023-11-29 05:20:27,260 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:20:27,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 05:20:27,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:20:27,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 05:20:27,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-29 05:20:27,262 INFO L87 Difference]: Start difference. First operand 235 states and 279 transitions. Second operand has 12 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2023-11-29 05:20:27,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:20:27,609 INFO L93 Difference]: Finished difference Result 262 states and 311 transitions. [2023-11-29 05:20:27,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 05:20:27,609 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 73 [2023-11-29 05:20:27,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:20:27,611 INFO L225 Difference]: With dead ends: 262 [2023-11-29 05:20:27,612 INFO L226 Difference]: Without dead ends: 217 [2023-11-29 05:20:27,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-11-29 05:20:27,613 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 15 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:20:27,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 233 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:20:27,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2023-11-29 05:20:27,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 209. [2023-11-29 05:20:27,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 143 states have (on average 1.1538461538461537) internal successors, (165), 146 states have internal predecessors, (165), 40 states have call successors, (40), 25 states have call predecessors, (40), 25 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) [2023-11-29 05:20:27,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 244 transitions. [2023-11-29 05:20:27,672 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 244 transitions. Word has length 73 [2023-11-29 05:20:27,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:20:27,672 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 244 transitions. [2023-11-29 05:20:27,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2023-11-29 05:20:27,673 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 244 transitions. [2023-11-29 05:20:27,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-29 05:20:27,674 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:20:27,674 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2023-11-29 05:20:27,679 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 05:20:27,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:20:27,875 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:20:27,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:20:27,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1153550505, now seen corresponding path program 2 times [2023-11-29 05:20:27,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:20:27,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929796251] [2023-11-29 05:20:27,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:20:27,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:20:27,887 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:20:27,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1838723301] [2023-11-29 05:20:27,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:20:27,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:20:27,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:20:27,889 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:20:27,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 05:20:27,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:20:27,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:20:27,960 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-29 05:20:27,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:20:28,351 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 28 proven. 64 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-11-29 05:20:28,351 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:21:02,264 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 28 proven. 58 refuted. 6 times theorem prover too weak. 276 trivial. 0 not checked. [2023-11-29 05:21:02,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:21:02,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929796251] [2023-11-29 05:21:02,265 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:21:02,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838723301] [2023-11-29 05:21:02,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838723301] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:21:02,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:21:02,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2023-11-29 05:21:02,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149589196] [2023-11-29 05:21:02,265 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:21:02,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 05:21:02,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:21:02,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 05:21:02,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=337, Unknown=1, NotChecked=0, Total=420 [2023-11-29 05:21:02,267 INFO L87 Difference]: Start difference. First operand 209 states and 244 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 19 states have internal predecessors, (53), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2023-11-29 05:22:00,263 WARN L293 SmtUtils]: Spent 57.56s on a formula simplification. DAG size of input: 168 DAG size of output: 82 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 05:22:03,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 05:22:07,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 05:22:11,131 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 05:22:25,996 WARN L293 SmtUtils]: Spent 13.10s on a formula simplification. DAG size of input: 56 DAG size of output: 48 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 05:22:27,647 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 05:22:31,859 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 05:22:37,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 05:22:39,595 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.41s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 05:22:44,176 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 05:22:45,862 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 05:22:47,640 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 05:22:50,319 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 05:22:54,689 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 05:22:54,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:22:54,739 INFO L93 Difference]: Finished difference Result 307 states and 395 transitions. [2023-11-29 05:22:54,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 05:22:54,739 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 19 states have internal predecessors, (53), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) Word has length 89 [2023-11-29 05:22:54,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:22:54,741 INFO L225 Difference]: With dead ends: 307 [2023-11-29 05:22:54,741 INFO L226 Difference]: Without dead ends: 257 [2023-11-29 05:22:54,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 80.8s TimeCoverageRelationStatistics Valid=151, Invalid=550, Unknown=1, NotChecked=0, Total=702 [2023-11-29 05:22:54,742 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 110 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 122 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:22:54,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 603 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 599 Invalid, 6 Unknown, 0 Unchecked, 39.1s Time] [2023-11-29 05:22:54,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2023-11-29 05:22:54,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 245. [2023-11-29 05:22:54,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 165 states have (on average 1.206060606060606) internal successors, (199), 173 states have internal predecessors, (199), 53 states have call successors, (53), 26 states have call predecessors, (53), 26 states have return successors, (52), 45 states have call predecessors, (52), 52 states have call successors, (52) [2023-11-29 05:22:54,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 304 transitions. [2023-11-29 05:22:54,828 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 304 transitions. Word has length 89 [2023-11-29 05:22:54,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:22:54,829 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 304 transitions. [2023-11-29 05:22:54,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 19 states have internal predecessors, (53), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2023-11-29 05:22:54,829 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 304 transitions. [2023-11-29 05:22:54,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-29 05:22:54,831 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:22:54,831 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:22:54,836 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 05:22:55,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 05:22:55,032 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:22:55,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:22:55,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1792633709, now seen corresponding path program 1 times [2023-11-29 05:22:55,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:22:55,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580914213] [2023-11-29 05:22:55,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:22:55,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:22:55,039 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:22:55,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [968642441] [2023-11-29 05:22:55,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:22:55,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:22:55,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:22:55,040 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:22:55,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 05:22:55,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:22:55,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 05:22:55,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:22:55,199 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 120 proven. 260 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-29 05:22:55,200 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:22:55,314 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2023-11-29 05:22:55,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:22:55,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580914213] [2023-11-29 05:22:55,314 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:22:55,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968642441] [2023-11-29 05:22:55,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968642441] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:22:55,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:22:55,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-11-29 05:22:55,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657662154] [2023-11-29 05:22:55,315 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:22:55,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 05:22:55,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:22:55,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 05:22:55,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-29 05:22:55,317 INFO L87 Difference]: Start difference. First operand 245 states and 304 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 9 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2023-11-29 05:22:55,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:22:55,830 INFO L93 Difference]: Finished difference Result 702 states and 938 transitions. [2023-11-29 05:22:55,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 05:22:55,831 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 9 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) Word has length 95 [2023-11-29 05:22:55,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:22:55,835 INFO L225 Difference]: With dead ends: 702 [2023-11-29 05:22:55,835 INFO L226 Difference]: Without dead ends: 627 [2023-11-29 05:22:55,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2023-11-29 05:22:55,837 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 155 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:22:55,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 192 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:22:55,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2023-11-29 05:22:56,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 542. [2023-11-29 05:22:56,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 359 states have (on average 1.2813370473537604) internal successors, (460), 385 states have internal predecessors, (460), 130 states have call successors, (130), 52 states have call predecessors, (130), 52 states have return successors, (127), 104 states have call predecessors, (127), 127 states have call successors, (127) [2023-11-29 05:22:56,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 717 transitions. [2023-11-29 05:22:56,043 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 717 transitions. Word has length 95 [2023-11-29 05:22:56,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:22:56,043 INFO L495 AbstractCegarLoop]: Abstraction has 542 states and 717 transitions. [2023-11-29 05:22:56,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 9 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2023-11-29 05:22:56,044 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 717 transitions. [2023-11-29 05:22:56,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-11-29 05:22:56,045 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:22:56,045 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-29 05:22:56,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-29 05:22:56,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 05:22:56,246 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:22:56,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:22:56,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1998377320, now seen corresponding path program 2 times [2023-11-29 05:22:56,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:22:56,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013195986] [2023-11-29 05:22:56,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:22:56,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:22:56,258 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:22:56,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [113373665] [2023-11-29 05:22:56,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:22:56,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:22:56,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:22:56,260 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:22:56,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 05:22:56,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:22:56,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:22:56,338 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-29 05:22:56,341 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:22:56,744 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 32 proven. 74 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2023-11-29 05:22:56,744 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:23:04,474 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 32 proven. 74 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2023-11-29 05:23:04,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:23:04,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013195986] [2023-11-29 05:23:04,474 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:23:04,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113373665] [2023-11-29 05:23:04,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113373665] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:23:04,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:23:04,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2023-11-29 05:23:04,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036721169] [2023-11-29 05:23:04,475 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:23:04,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 05:23:04,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:23:04,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 05:23:04,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=545, Unknown=0, NotChecked=0, Total=702 [2023-11-29 05:23:04,476 INFO L87 Difference]: Start difference. First operand 542 states and 717 transitions. Second operand has 27 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 15 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 13 states have call predecessors, (30), 13 states have call successors, (30) [2023-11-29 05:23:13,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 05:23:17,585 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.91s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 05:23:26,536 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 05:23:28,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 05:23:28,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:23:28,540 INFO L93 Difference]: Finished difference Result 720 states and 974 transitions. [2023-11-29 05:23:28,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-29 05:23:28,542 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 15 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 13 states have call predecessors, (30), 13 states have call successors, (30) Word has length 100 [2023-11-29 05:23:28,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:23:28,545 INFO L225 Difference]: With dead ends: 720 [2023-11-29 05:23:28,545 INFO L226 Difference]: Without dead ends: 592 [2023-11-29 05:23:28,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=409, Invalid=1231, Unknown=0, NotChecked=0, Total=1640 [2023-11-29 05:23:28,546 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 139 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 140 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:23:28,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 461 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 537 Invalid, 2 Unknown, 0 Unchecked, 16.1s Time] [2023-11-29 05:23:28,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2023-11-29 05:23:28,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 523. [2023-11-29 05:23:28,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 345 states have (on average 1.2521739130434784) internal successors, (432), 366 states have internal predecessors, (432), 124 states have call successors, (124), 53 states have call predecessors, (124), 53 states have return successors, (121), 103 states have call predecessors, (121), 121 states have call successors, (121) [2023-11-29 05:23:28,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 677 transitions. [2023-11-29 05:23:28,805 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 677 transitions. Word has length 100 [2023-11-29 05:23:28,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:23:28,805 INFO L495 AbstractCegarLoop]: Abstraction has 523 states and 677 transitions. [2023-11-29 05:23:28,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 15 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 13 states have call predecessors, (30), 13 states have call successors, (30) [2023-11-29 05:23:28,806 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 677 transitions. [2023-11-29 05:23:28,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-29 05:23:28,807 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:23:28,807 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:23:28,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 05:23:29,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 05:23:29,008 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:23:29,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:23:29,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1473599393, now seen corresponding path program 1 times [2023-11-29 05:23:29,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:23:29,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316569448] [2023-11-29 05:23:29,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:23:29,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:23:29,016 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:23:29,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [586600300] [2023-11-29 05:23:29,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:23:29,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:23:29,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:23:29,018 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:23:29,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 05:23:29,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:23:29,085 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 05:23:29,088 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:23:29,216 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 414 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-29 05:23:29,216 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:23:29,374 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 42 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-29 05:23:29,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:23:29,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316569448] [2023-11-29 05:23:29,374 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:23:29,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586600300] [2023-11-29 05:23:29,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586600300] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:23:29,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:23:29,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-11-29 05:23:29,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716536001] [2023-11-29 05:23:29,375 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:23:29,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 05:23:29,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:23:29,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 05:23:29,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2023-11-29 05:23:29,376 INFO L87 Difference]: Start difference. First operand 523 states and 677 transitions. Second operand has 18 states, 18 states have (on average 4.0) internal successors, (72), 18 states have internal predecessors, (72), 13 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) [2023-11-29 05:23:30,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:23:30,367 INFO L93 Difference]: Finished difference Result 1020 states and 1348 transitions. [2023-11-29 05:23:30,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-29 05:23:30,367 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.0) internal successors, (72), 18 states have internal predecessors, (72), 13 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) Word has length 103 [2023-11-29 05:23:30,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:23:30,372 INFO L225 Difference]: With dead ends: 1020 [2023-11-29 05:23:30,372 INFO L226 Difference]: Without dead ends: 983 [2023-11-29 05:23:30,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=259, Invalid=497, Unknown=0, NotChecked=0, Total=756 [2023-11-29 05:23:30,373 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 240 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:23:30,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 265 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 05:23:30,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2023-11-29 05:23:30,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 966. [2023-11-29 05:23:30,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 966 states, 637 states have (on average 1.1805337519623234) internal successors, (752), 682 states have internal predecessors, (752), 238 states have call successors, (238), 91 states have call predecessors, (238), 90 states have return successors, (229), 192 states have call predecessors, (229), 229 states have call successors, (229) [2023-11-29 05:23:30,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 966 states to 966 states and 1219 transitions. [2023-11-29 05:23:30,862 INFO L78 Accepts]: Start accepts. Automaton has 966 states and 1219 transitions. Word has length 103 [2023-11-29 05:23:30,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:23:30,862 INFO L495 AbstractCegarLoop]: Abstraction has 966 states and 1219 transitions. [2023-11-29 05:23:30,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.0) internal successors, (72), 18 states have internal predecessors, (72), 13 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) [2023-11-29 05:23:30,862 INFO L276 IsEmpty]: Start isEmpty. Operand 966 states and 1219 transitions. [2023-11-29 05:23:30,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-29 05:23:30,864 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:23:30,864 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:23:30,870 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 05:23:31,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 05:23:31,065 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:23:31,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:23:31,065 INFO L85 PathProgramCache]: Analyzing trace with hash 102666096, now seen corresponding path program 2 times [2023-11-29 05:23:31,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:23:31,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441058689] [2023-11-29 05:23:31,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:23:31,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:23:31,072 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:23:31,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [641136077] [2023-11-29 05:23:31,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:23:31,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:23:31,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:23:31,073 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:23:31,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 05:23:31,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:23:31,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:23:31,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-29 05:23:31,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:23:31,359 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 34 proven. 77 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2023-11-29 05:23:31,359 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:23:32,688 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 34 proven. 77 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2023-11-29 05:23:32,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:23:32,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441058689] [2023-11-29 05:23:32,688 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:23:32,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641136077] [2023-11-29 05:23:32,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641136077] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:23:32,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:23:32,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2023-11-29 05:23:32,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449798305] [2023-11-29 05:23:32,689 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:23:32,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 05:23:32,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:23:32,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 05:23:32,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-11-29 05:23:32,691 INFO L87 Difference]: Start difference. First operand 966 states and 1219 transitions. Second operand has 18 states, 16 states have (on average 3.4375) internal successors, (55), 17 states have internal predecessors, (55), 10 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) [2023-11-29 05:23:33,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:23:33,828 INFO L93 Difference]: Finished difference Result 1194 states and 1489 transitions. [2023-11-29 05:23:33,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 05:23:33,828 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.4375) internal successors, (55), 17 states have internal predecessors, (55), 10 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) Word has length 105 [2023-11-29 05:23:33,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:23:33,833 INFO L225 Difference]: With dead ends: 1194 [2023-11-29 05:23:33,833 INFO L226 Difference]: Without dead ends: 867 [2023-11-29 05:23:33,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2023-11-29 05:23:33,834 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 30 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 05:23:33,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 331 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 05:23:33,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2023-11-29 05:23:34,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 859. [2023-11-29 05:23:34,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 572 states have (on average 1.1590909090909092) internal successors, (663), 610 states have internal predecessors, (663), 209 states have call successors, (209), 78 states have call predecessors, (209), 77 states have return successors, (200), 170 states have call predecessors, (200), 200 states have call successors, (200) [2023-11-29 05:23:34,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 1072 transitions. [2023-11-29 05:23:34,274 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 1072 transitions. Word has length 105 [2023-11-29 05:23:34,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:23:34,274 INFO L495 AbstractCegarLoop]: Abstraction has 859 states and 1072 transitions. [2023-11-29 05:23:34,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.4375) internal successors, (55), 17 states have internal predecessors, (55), 10 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) [2023-11-29 05:23:34,275 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 1072 transitions. [2023-11-29 05:23:34,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-11-29 05:23:34,277 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:23:34,277 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:23:34,283 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 05:23:34,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 05:23:34,478 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:23:34,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:23:34,478 INFO L85 PathProgramCache]: Analyzing trace with hash 518227549, now seen corresponding path program 1 times [2023-11-29 05:23:34,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:23:34,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849842743] [2023-11-29 05:23:34,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:23:34,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:23:34,485 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:23:34,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1951601456] [2023-11-29 05:23:34,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:23:34,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:23:34,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:23:34,486 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:23:34,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 05:23:34,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:23:34,548 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 05:23:34,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:23:34,610 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 72 proven. 16 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2023-11-29 05:23:34,610 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:23:34,729 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 72 proven. 16 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2023-11-29 05:23:34,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:23:34,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849842743] [2023-11-29 05:23:34,730 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:23:34,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951601456] [2023-11-29 05:23:34,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951601456] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:23:34,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:23:34,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2023-11-29 05:23:34,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160417298] [2023-11-29 05:23:34,731 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:23:34,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:23:34,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:23:34,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:23:34,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:23:34,732 INFO L87 Difference]: Start difference. First operand 859 states and 1072 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2023-11-29 05:23:35,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:23:35,249 INFO L93 Difference]: Finished difference Result 918 states and 1142 transitions. [2023-11-29 05:23:35,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:23:35,249 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 118 [2023-11-29 05:23:35,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:23:35,253 INFO L225 Difference]: With dead ends: 918 [2023-11-29 05:23:35,253 INFO L226 Difference]: Without dead ends: 878 [2023-11-29 05:23:35,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 224 SyntacticMatches, 6 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:23:35,254 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 15 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:23:35,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 126 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:23:35,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2023-11-29 05:23:35,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 795. [2023-11-29 05:23:35,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 534 states have (on average 1.1535580524344569) internal successors, (616), 565 states have internal predecessors, (616), 183 states have call successors, (183), 77 states have call predecessors, (183), 77 states have return successors, (175), 152 states have call predecessors, (175), 175 states have call successors, (175) [2023-11-29 05:23:35,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 974 transitions. [2023-11-29 05:23:35,653 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 974 transitions. Word has length 118 [2023-11-29 05:23:35,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:23:35,654 INFO L495 AbstractCegarLoop]: Abstraction has 795 states and 974 transitions. [2023-11-29 05:23:35,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2023-11-29 05:23:35,654 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 974 transitions. [2023-11-29 05:23:35,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-29 05:23:35,656 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:23:35,656 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2023-11-29 05:23:35,661 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 05:23:35,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 05:23:35,856 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:23:35,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:23:35,857 INFO L85 PathProgramCache]: Analyzing trace with hash 236832332, now seen corresponding path program 3 times [2023-11-29 05:23:35,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:23:35,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977856217] [2023-11-29 05:23:35,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:23:35,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:23:35,869 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:23:35,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [501847268] [2023-11-29 05:23:35,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:23:35,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:23:35,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:23:35,871 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:23:35,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 05:23:35,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 05:23:35,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:23:35,949 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-29 05:23:35,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:23:36,145 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 159 proven. 47 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2023-11-29 05:23:36,145 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:23:39,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:23:39,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977856217] [2023-11-29 05:23:39,106 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:23:39,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501847268] [2023-11-29 05:23:39,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501847268] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:23:39,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:23:39,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-11-29 05:23:39,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746062128] [2023-11-29 05:23:39,106 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 05:23:39,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 05:23:39,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:23:39,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 05:23:39,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2023-11-29 05:23:39,108 INFO L87 Difference]: Start difference. First operand 795 states and 974 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-29 05:23:39,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:23:39,639 INFO L93 Difference]: Finished difference Result 826 states and 1004 transitions. [2023-11-29 05:23:39,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:23:39,639 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) Word has length 121 [2023-11-29 05:23:39,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:23:39,643 INFO L225 Difference]: With dead ends: 826 [2023-11-29 05:23:39,643 INFO L226 Difference]: Without dead ends: 812 [2023-11-29 05:23:39,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-11-29 05:23:39,644 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 40 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:23:39,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 88 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:23:39,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2023-11-29 05:23:40,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 796. [2023-11-29 05:23:40,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 539 states have (on average 1.1410018552875696) internal successors, (615), 564 states have internal predecessors, (615), 178 states have call successors, (178), 79 states have call predecessors, (178), 78 states have return successors, (175), 152 states have call predecessors, (175), 175 states have call successors, (175) [2023-11-29 05:23:40,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 968 transitions. [2023-11-29 05:23:40,230 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 968 transitions. Word has length 121 [2023-11-29 05:23:40,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:23:40,231 INFO L495 AbstractCegarLoop]: Abstraction has 796 states and 968 transitions. [2023-11-29 05:23:40,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-29 05:23:40,231 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 968 transitions. [2023-11-29 05:23:40,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-11-29 05:23:40,233 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:23:40,234 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2023-11-29 05:23:40,239 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 05:23:40,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 05:23:40,435 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:23:40,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:23:40,436 INFO L85 PathProgramCache]: Analyzing trace with hash -644102317, now seen corresponding path program 3 times [2023-11-29 05:23:40,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:23:40,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891007917] [2023-11-29 05:23:40,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:23:40,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:23:40,445 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:23:40,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1968657213] [2023-11-29 05:23:40,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:23:40,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:23:40,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:23:40,446 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:23:40,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 05:23:40,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 05:23:40,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:23:40,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-29 05:23:40,515 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:23:40,662 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 163 proven. 56 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2023-11-29 05:23:40,662 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:23:40,805 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 152 proven. 2 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2023-11-29 05:23:40,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:23:40,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891007917] [2023-11-29 05:23:40,806 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:23:40,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968657213] [2023-11-29 05:23:40,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968657213] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:23:40,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:23:40,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2023-11-29 05:23:40,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119560254] [2023-11-29 05:23:40,807 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:23:40,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 05:23:40,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:23:40,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 05:23:40,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-11-29 05:23:40,808 INFO L87 Difference]: Start difference. First operand 796 states and 968 transitions. Second operand has 16 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2023-11-29 05:23:41,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:23:41,427 INFO L93 Difference]: Finished difference Result 803 states and 974 transitions. [2023-11-29 05:23:41,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 05:23:41,428 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) Word has length 132 [2023-11-29 05:23:41,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:23:41,431 INFO L225 Difference]: With dead ends: 803 [2023-11-29 05:23:41,431 INFO L226 Difference]: Without dead ends: 793 [2023-11-29 05:23:41,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2023-11-29 05:23:41,432 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 66 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:23:41,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 148 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:23:41,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2023-11-29 05:23:41,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 524. [2023-11-29 05:23:41,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 351 states have (on average 1.1111111111111112) internal successors, (390), 370 states have internal predecessors, (390), 109 states have call successors, (109), 63 states have call predecessors, (109), 63 states have return successors, (108), 90 states have call predecessors, (108), 108 states have call successors, (108) [2023-11-29 05:23:41,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 607 transitions. [2023-11-29 05:23:41,768 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 607 transitions. Word has length 132 [2023-11-29 05:23:41,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:23:41,768 INFO L495 AbstractCegarLoop]: Abstraction has 524 states and 607 transitions. [2023-11-29 05:23:41,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2023-11-29 05:23:41,769 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 607 transitions. [2023-11-29 05:23:41,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2023-11-29 05:23:41,771 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:23:41,771 INFO L195 NwaCegarLoop]: trace histogram [33, 32, 32, 11, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2023-11-29 05:23:41,776 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 05:23:41,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:23:41,972 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:23:41,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:23:41,972 INFO L85 PathProgramCache]: Analyzing trace with hash -779877414, now seen corresponding path program 1 times [2023-11-29 05:23:41,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:23:41,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379820771] [2023-11-29 05:23:41,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:23:41,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:23:41,983 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:23:41,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [10643638] [2023-11-29 05:23:41,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:23:41,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:23:41,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:23:41,985 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:23:41,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 05:23:42,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:23:42,106 INFO L262 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-29 05:23:42,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:23:42,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2374 backedges. 64 proven. 2222 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2023-11-29 05:23:42,403 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:23:42,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2374 backedges. 64 proven. 326 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2023-11-29 05:23:42,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:23:42,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379820771] [2023-11-29 05:23:42,820 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:23:42,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10643638] [2023-11-29 05:23:42,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10643638] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:23:42,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:23:42,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2023-11-29 05:23:42,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321041268] [2023-11-29 05:23:42,820 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:23:42,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-29 05:23:42,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:23:42,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-29 05:23:42,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 05:23:42,824 INFO L87 Difference]: Start difference. First operand 524 states and 607 transitions. Second operand has 34 states, 34 states have (on average 4.647058823529412) internal successors, (158), 34 states have internal predecessors, (158), 29 states have call successors, (65), 16 states have call predecessors, (65), 15 states have return successors, (64), 28 states have call predecessors, (64), 28 states have call successors, (64) [2023-11-29 05:23:45,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:23:45,036 INFO L93 Difference]: Finished difference Result 1258 states and 1549 transitions. [2023-11-29 05:23:45,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-11-29 05:23:45,036 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.647058823529412) internal successors, (158), 34 states have internal predecessors, (158), 29 states have call successors, (65), 16 states have call predecessors, (65), 15 states have return successors, (64), 28 states have call predecessors, (64), 28 states have call successors, (64) Word has length 219 [2023-11-29 05:23:45,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:23:45,043 INFO L225 Difference]: With dead ends: 1258 [2023-11-29 05:23:45,043 INFO L226 Difference]: Without dead ends: 1245 [2023-11-29 05:23:45,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 404 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1212, Invalid=2210, Unknown=0, NotChecked=0, Total=3422 [2023-11-29 05:23:45,045 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 591 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 05:23:45,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [591 Valid, 387 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 05:23:45,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1245 states. [2023-11-29 05:23:45,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1245 to 1244. [2023-11-29 05:23:45,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1244 states, 831 states have (on average 1.1239470517448857) internal successors, (934), 882 states have internal predecessors, (934), 269 states have call successors, (269), 143 states have call predecessors, (269), 143 states have return successors, (268), 218 states have call predecessors, (268), 268 states have call successors, (268) [2023-11-29 05:23:45,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 1471 transitions. [2023-11-29 05:23:45,948 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 1471 transitions. Word has length 219 [2023-11-29 05:23:45,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:23:45,948 INFO L495 AbstractCegarLoop]: Abstraction has 1244 states and 1471 transitions. [2023-11-29 05:23:45,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.647058823529412) internal successors, (158), 34 states have internal predecessors, (158), 29 states have call successors, (65), 16 states have call predecessors, (65), 15 states have return successors, (64), 28 states have call predecessors, (64), 28 states have call successors, (64) [2023-11-29 05:23:45,949 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 1471 transitions. [2023-11-29 05:23:45,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2023-11-29 05:23:45,956 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:23:45,956 INFO L195 NwaCegarLoop]: trace histogram [65, 64, 64, 27, 26, 26, 26, 26, 26, 26, 26, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2023-11-29 05:23:45,961 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 05:23:46,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:23:46,157 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:23:46,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:23:46,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1080827750, now seen corresponding path program 2 times [2023-11-29 05:23:46,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:23:46,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124053005] [2023-11-29 05:23:46,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:23:46,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:23:46,175 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:23:46,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1428100532] [2023-11-29 05:23:46,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:23:46,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:23:46,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:23:46,176 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:23:46,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 05:23:46,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:23:46,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:23:46,367 INFO L262 TraceCheckSpWp]: Trace formula consists of 1067 conjuncts, 63 conjunts are in the unsatisfiable core [2023-11-29 05:23:46,375 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:23:47,256 INFO L134 CoverageAnalysis]: Checked inductivity of 10230 backedges. 128 proven. 9950 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2023-11-29 05:23:47,256 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:23:48,570 INFO L134 CoverageAnalysis]: Checked inductivity of 10230 backedges. 128 proven. 2038 refuted. 0 times theorem prover too weak. 8064 trivial. 0 not checked. [2023-11-29 05:23:48,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:23:48,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124053005] [2023-11-29 05:23:48,570 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:23:48,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428100532] [2023-11-29 05:23:48,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428100532] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:23:48,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:23:48,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34] total 66 [2023-11-29 05:23:48,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152489266] [2023-11-29 05:23:48,571 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:23:48,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-11-29 05:23:48,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:23:48,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-11-29 05:23:48,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2021, Invalid=2269, Unknown=0, NotChecked=0, Total=4290 [2023-11-29 05:23:48,576 INFO L87 Difference]: Start difference. First operand 1244 states and 1471 transitions. Second operand has 66 states, 66 states have (on average 5.0606060606060606) internal successors, (334), 66 states have internal predecessors, (334), 61 states have call successors, (129), 32 states have call predecessors, (129), 31 states have return successors, (128), 60 states have call predecessors, (128), 60 states have call successors, (128) [2023-11-29 05:23:54,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:23:54,495 INFO L93 Difference]: Finished difference Result 2698 states and 3341 transitions. [2023-11-29 05:23:54,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2023-11-29 05:23:54,496 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 5.0606060606060606) internal successors, (334), 66 states have internal predecessors, (334), 61 states have call successors, (129), 32 states have call predecessors, (129), 31 states have return successors, (128), 60 states have call predecessors, (128), 60 states have call successors, (128) Word has length 443 [2023-11-29 05:23:54,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:23:54,506 INFO L225 Difference]: With dead ends: 2698 [2023-11-29 05:23:54,506 INFO L226 Difference]: Without dead ends: 2685 [2023-11-29 05:23:54,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 941 GetRequests, 820 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2122 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=5468, Invalid=9538, Unknown=0, NotChecked=0, Total=15006 [2023-11-29 05:23:54,512 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1585 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 1033 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1585 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 1832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1033 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:23:54,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1585 Valid, 728 Invalid, 1832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1033 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-29 05:23:54,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2685 states. [2023-11-29 05:23:56,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2685 to 2684. [2023-11-29 05:23:56,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2684 states, 1791 states have (on average 1.1289782244556115) internal successors, (2022), 1906 states have internal predecessors, (2022), 589 states have call successors, (589), 303 states have call predecessors, (589), 303 states have return successors, (588), 474 states have call predecessors, (588), 588 states have call successors, (588) [2023-11-29 05:23:56,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2684 states to 2684 states and 3199 transitions. [2023-11-29 05:23:56,480 INFO L78 Accepts]: Start accepts. Automaton has 2684 states and 3199 transitions. Word has length 443 [2023-11-29 05:23:56,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:23:56,481 INFO L495 AbstractCegarLoop]: Abstraction has 2684 states and 3199 transitions. [2023-11-29 05:23:56,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 5.0606060606060606) internal successors, (334), 66 states have internal predecessors, (334), 61 states have call successors, (129), 32 states have call predecessors, (129), 31 states have return successors, (128), 60 states have call predecessors, (128), 60 states have call successors, (128) [2023-11-29 05:23:56,481 INFO L276 IsEmpty]: Start isEmpty. Operand 2684 states and 3199 transitions. [2023-11-29 05:23:56,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 892 [2023-11-29 05:23:56,493 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:23:56,494 INFO L195 NwaCegarLoop]: trace histogram [129, 128, 128, 59, 58, 58, 58, 58, 58, 58, 58, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2023-11-29 05:23:56,499 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 05:23:56,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:23:56,694 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:23:56,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:23:56,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1974167014, now seen corresponding path program 3 times [2023-11-29 05:23:56,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:23:56,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258946225] [2023-11-29 05:23:56,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:23:56,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:23:56,728 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:23:56,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [989150337] [2023-11-29 05:23:56,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:23:56,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:23:56,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:23:56,729 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:23:56,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 05:25:12,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 68 check-sat command(s) [2023-11-29 05:25:12,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:25:13,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 1652 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-29 05:25:13,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:25:13,483 INFO L134 CoverageAnalysis]: Checked inductivity of 42838 backedges. 9981 proven. 78 refuted. 0 times theorem prover too weak. 32779 trivial. 0 not checked. [2023-11-29 05:25:13,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:25:43,490 INFO L134 CoverageAnalysis]: Checked inductivity of 42838 backedges. 1557 proven. 402 refuted. 0 times theorem prover too weak. 40879 trivial. 0 not checked. [2023-11-29 05:25:43,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:25:43,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258946225] [2023-11-29 05:25:43,490 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:25:43,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989150337] [2023-11-29 05:25:43,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989150337] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:25:43,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:25:43,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2023-11-29 05:25:43,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432354250] [2023-11-29 05:25:43,492 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:25:43,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 05:25:43,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:25:43,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 05:25:43,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2023-11-29 05:25:43,494 INFO L87 Difference]: Start difference. First operand 2684 states and 3199 transitions. Second operand has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 20 states have internal predecessors, (70), 16 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (42), 14 states have call predecessors, (42), 16 states have call successors, (42) [2023-11-29 05:25:46,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.93s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 05:25:49,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:25:49,184 INFO L93 Difference]: Finished difference Result 3993 states and 4798 transitions. [2023-11-29 05:25:49,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 05:25:49,185 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 20 states have internal predecessors, (70), 16 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (42), 14 states have call predecessors, (42), 16 states have call successors, (42) Word has length 891 [2023-11-29 05:25:49,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:25:49,200 INFO L225 Difference]: With dead ends: 3993 [2023-11-29 05:25:49,200 INFO L226 Difference]: Without dead ends: 2657 [2023-11-29 05:25:49,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1781 GetRequests, 1760 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2023-11-29 05:25:49,205 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 49 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-11-29 05:25:49,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 681 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-11-29 05:25:49,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2657 states. [2023-11-29 05:25:51,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2657 to 2657. [2023-11-29 05:25:51,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2657 states, 1773 states have (on average 1.128595600676819) internal successors, (2001), 1886 states have internal predecessors, (2001), 582 states have call successors, (582), 301 states have call predecessors, (582), 301 states have return successors, (581), 469 states have call predecessors, (581), 581 states have call successors, (581) [2023-11-29 05:25:51,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2657 states to 2657 states and 3164 transitions. [2023-11-29 05:25:51,112 INFO L78 Accepts]: Start accepts. Automaton has 2657 states and 3164 transitions. Word has length 891 [2023-11-29 05:25:51,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:25:51,113 INFO L495 AbstractCegarLoop]: Abstraction has 2657 states and 3164 transitions. [2023-11-29 05:25:51,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 20 states have internal predecessors, (70), 16 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (42), 14 states have call predecessors, (42), 16 states have call successors, (42) [2023-11-29 05:25:51,113 INFO L276 IsEmpty]: Start isEmpty. Operand 2657 states and 3164 transitions. [2023-11-29 05:25:51,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 896 [2023-11-29 05:25:51,129 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:25:51,130 INFO L195 NwaCegarLoop]: trace histogram [130, 129, 129, 58, 57, 57, 57, 57, 57, 57, 57, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1] [2023-11-29 05:25:51,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-29 05:25:51,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-29 05:25:51,331 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:25:51,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:25:51,331 INFO L85 PathProgramCache]: Analyzing trace with hash 420157175, now seen corresponding path program 4 times [2023-11-29 05:25:51,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:25:51,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166615801] [2023-11-29 05:25:51,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:25:51,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:25:51,368 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:25:51,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1207811676] [2023-11-29 05:25:51,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:25:51,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:25:51,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:25:51,370 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:25:51,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe365c0d-65d4-4234-b773-9bfb62cd0eaa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process