./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/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_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/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_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/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 ac02a57e98f6481647f49b84c91fda6d0505e35fbffb37ed6b508f20e911a1af --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 06:37:14,689 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 06:37:14,752 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 06:37:14,757 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 06:37:14,758 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 06:37:14,782 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 06:37:14,782 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 06:37:14,783 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 06:37:14,784 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 06:37:14,784 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 06:37:14,785 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 06:37:14,785 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 06:37:14,786 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 06:37:14,787 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 06:37:14,787 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 06:37:14,788 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 06:37:14,788 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 06:37:14,789 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 06:37:14,789 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 06:37:14,789 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 06:37:14,790 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 06:37:14,791 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 06:37:14,791 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 06:37:14,791 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 06:37:14,792 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 06:37:14,792 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 06:37:14,793 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 06:37:14,793 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 06:37:14,793 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 06:37:14,794 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 06:37:14,794 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 06:37:14,795 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:37:14,795 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 06:37:14,796 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 06:37:14,796 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 06:37:14,796 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 06:37:14,797 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 06:37:14,797 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 06:37:14,797 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 06:37:14,797 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 06:37:14,797 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 06:37:14,798 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 06:37:14,798 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_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac02a57e98f6481647f49b84c91fda6d0505e35fbffb37ed6b508f20e911a1af [2023-11-29 06:37:15,027 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 06:37:15,059 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 06:37:15,061 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 06:37:15,063 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 06:37:15,063 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 06:37:15,064 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c [2023-11-29 06:37:17,759 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 06:37:17,935 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 06:37:17,936 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c [2023-11-29 06:37:17,943 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/data/ed8469b42/f49d8ae18d1445b8a42df6482ad19f57/FLAG13d2c4c91 [2023-11-29 06:37:17,955 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/data/ed8469b42/f49d8ae18d1445b8a42df6482ad19f57 [2023-11-29 06:37:17,957 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 06:37:17,958 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 06:37:17,960 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 06:37:17,960 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 06:37:17,965 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 06:37:17,966 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:37:17" (1/1) ... [2023-11-29 06:37:17,967 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50b063d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:37:17, skipping insertion in model container [2023-11-29 06:37:17,967 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:37:17" (1/1) ... [2023-11-29 06:37:17,988 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 06:37:18,123 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_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c[1052,1065] [2023-11-29 06:37:18,141 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:37:18,150 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 06:37:18,163 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_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c[1052,1065] [2023-11-29 06:37:18,174 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:37:18,186 INFO L206 MainTranslator]: Completed translation [2023-11-29 06:37:18,186 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:37:18 WrapperNode [2023-11-29 06:37:18,186 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 06:37:18,187 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 06:37:18,187 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 06:37:18,187 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 06:37:18,195 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:37:18" (1/1) ... [2023-11-29 06:37:18,201 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:37:18" (1/1) ... [2023-11-29 06:37:18,217 INFO L138 Inliner]: procedures = 16, calls = 58, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 60 [2023-11-29 06:37:18,217 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 06:37:18,218 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 06:37:18,218 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 06:37:18,218 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 06:37:18,226 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:37:18" (1/1) ... [2023-11-29 06:37:18,226 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:37:18" (1/1) ... [2023-11-29 06:37:18,229 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:37:18" (1/1) ... [2023-11-29 06:37:18,241 INFO L175 MemorySlicer]: Split 33 memory accesses to 5 slices as follows [2, 12, 8, 9, 2]. 36 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 7 writes are split as follows [0, 2, 2, 2, 1]. [2023-11-29 06:37:18,241 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:37:18" (1/1) ... [2023-11-29 06:37:18,241 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:37:18" (1/1) ... [2023-11-29 06:37:18,246 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:37:18" (1/1) ... [2023-11-29 06:37:18,247 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:37:18" (1/1) ... [2023-11-29 06:37:18,249 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:37:18" (1/1) ... [2023-11-29 06:37:18,250 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:37:18" (1/1) ... [2023-11-29 06:37:18,252 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 06:37:18,253 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 06:37:18,253 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 06:37:18,253 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 06:37:18,254 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:37:18" (1/1) ... [2023-11-29 06:37:18,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:37:18,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:37:18,280 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 06:37:18,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 06:37:18,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 06:37:18,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 06:37:18,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 06:37:18,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 06:37:18,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 06:37:18,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 06:37:18,315 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 06:37:18,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 06:37:18,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 06:37:18,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 06:37:18,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 06:37:18,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-29 06:37:18,316 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_29_to_40_0 [2023-11-29 06:37:18,316 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_29_to_40_0 [2023-11-29 06:37:18,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 06:37:18,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 06:37:18,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 06:37:18,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 06:37:18,317 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 06:37:18,317 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 06:37:18,317 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-29 06:37:18,317 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-29 06:37:18,317 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-29 06:37:18,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 06:37:18,403 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 06:37:18,405 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 06:37:18,573 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 06:37:18,603 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 06:37:18,603 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 06:37:18,604 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:37:18 BoogieIcfgContainer [2023-11-29 06:37:18,604 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 06:37:18,607 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 06:37:18,607 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 06:37:18,610 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 06:37:18,610 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:37:17" (1/3) ... [2023-11-29 06:37:18,611 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61337add and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:37:18, skipping insertion in model container [2023-11-29 06:37:18,611 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:37:18" (2/3) ... [2023-11-29 06:37:18,612 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61337add and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:37:18, skipping insertion in model container [2023-11-29 06:37:18,612 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:37:18" (3/3) ... [2023-11-29 06:37:18,613 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_sqrt1-ll.c [2023-11-29 06:37:18,632 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 06:37:18,632 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 06:37:18,677 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 06:37:18,683 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;@1806a288, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 06:37:18,684 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 06:37:18,687 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-29 06:37:18,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-29 06:37:18,694 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:37:18,695 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:37:18,695 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:37:18,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:37:18,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1408384077, now seen corresponding path program 1 times [2023-11-29 06:37:18,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:37:18,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155521169] [2023-11-29 06:37:18,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:37:18,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:37:18,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:37:19,352 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 06:37:19,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:37:19,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155521169] [2023-11-29 06:37:19,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155521169] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:37:19,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:37:19,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 06:37:19,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685959018] [2023-11-29 06:37:19,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:37:19,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 06:37:19,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:37:19,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 06:37:19,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-29 06:37:19,390 INFO L87 Difference]: Start difference. First operand has 28 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:37:19,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:37:19,653 INFO L93 Difference]: Finished difference Result 76 states and 113 transitions. [2023-11-29 06:37:19,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 06:37:19,655 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-29 06:37:19,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:37:19,663 INFO L225 Difference]: With dead ends: 76 [2023-11-29 06:37:19,663 INFO L226 Difference]: Without dead ends: 47 [2023-11-29 06:37:19,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-29 06:37:19,670 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 22 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:37:19,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 106 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:37:19,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-29 06:37:19,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2023-11-29 06:37:19,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 25 states have (on average 1.12) internal successors, (28), 27 states have internal predecessors, (28), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-11-29 06:37:19,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2023-11-29 06:37:19,715 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 8 [2023-11-29 06:37:19,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:37:19,715 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2023-11-29 06:37:19,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:37:19,716 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2023-11-29 06:37:19,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-29 06:37:19,717 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:37:19,717 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:37:19,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 06:37:19,717 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:37:19,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:37:19,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1735781632, now seen corresponding path program 1 times [2023-11-29 06:37:19,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:37:19,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119904774] [2023-11-29 06:37:19,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:37:19,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:37:19,741 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:37:19,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [795474821] [2023-11-29 06:37:19,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:37:19,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:37:19,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:37:19,746 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:37:19,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 06:37:19,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:37:19,849 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 63 conjunts are in the unsatisfiable core [2023-11-29 06:37:19,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:37:19,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:37:19,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:37:19,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:37:20,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:37:20,339 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:37:20,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:37:20,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:37:20,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119904774] [2023-11-29 06:37:20,784 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:37:20,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795474821] [2023-11-29 06:37:20,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795474821] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:37:20,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:37:20,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2023-11-29 06:37:20,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896715439] [2023-11-29 06:37:20,785 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:37:20,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 06:37:20,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:37:20,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 06:37:20,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=428, Unknown=1, NotChecked=0, Total=506 [2023-11-29 06:37:20,788 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand has 23 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 15 states have internal predecessors, (19), 6 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 06:37:25,470 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-11-29 06:37:33,549 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-11-29 06:37:34,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:37:34,017 INFO L93 Difference]: Finished difference Result 68 states and 81 transitions. [2023-11-29 06:37:34,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 06:37:34,018 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 15 states have internal predecessors, (19), 6 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 14 [2023-11-29 06:37:34,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:37:34,021 INFO L225 Difference]: With dead ends: 68 [2023-11-29 06:37:34,021 INFO L226 Difference]: Without dead ends: 66 [2023-11-29 06:37:34,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=197, Invalid=991, Unknown=2, NotChecked=0, Total=1190 [2023-11-29 06:37:34,024 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 72 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 42 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2023-11-29 06:37:34,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 94 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 296 Invalid, 2 Unknown, 0 Unchecked, 8.7s Time] [2023-11-29 06:37:34,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-29 06:37:34,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2023-11-29 06:37:34,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 38 states have (on average 1.105263157894737) internal successors, (42), 40 states have internal predecessors, (42), 14 states have call successors, (14), 7 states have call predecessors, (14), 8 states have return successors, (14), 13 states have call predecessors, (14), 12 states have call successors, (14) [2023-11-29 06:37:34,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2023-11-29 06:37:34,044 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 14 [2023-11-29 06:37:34,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:37:34,045 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2023-11-29 06:37:34,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 15 states have internal predecessors, (19), 6 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 06:37:34,045 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2023-11-29 06:37:34,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-29 06:37:34,046 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:37:34,046 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:37:34,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 06:37:34,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:37:34,249 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:37:34,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:37:34,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1054740085, now seen corresponding path program 1 times [2023-11-29 06:37:34,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:37:34,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756214415] [2023-11-29 06:37:34,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:37:34,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:37:34,267 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:37:34,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1624624299] [2023-11-29 06:37:34,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:37:34,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:37:34,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:37:34,268 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:37:34,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 06:37:34,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:37:34,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-29 06:37:34,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:37:34,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:37:34,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:37:34,752 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 06:37:34,752 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:37:35,002 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 06:37:35,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:37:35,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756214415] [2023-11-29 06:37:35,003 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:37:35,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624624299] [2023-11-29 06:37:35,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624624299] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 06:37:35,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:37:35,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 17 [2023-11-29 06:37:35,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598076342] [2023-11-29 06:37:35,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:37:35,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 06:37:35,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:37:35,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 06:37:35,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2023-11-29 06:37:35,005 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 06:37:35,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:37:35,730 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2023-11-29 06:37:35,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 06:37:35,731 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2023-11-29 06:37:35,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:37:35,732 INFO L225 Difference]: With dead ends: 73 [2023-11-29 06:37:35,732 INFO L226 Difference]: Without dead ends: 71 [2023-11-29 06:37:35,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2023-11-29 06:37:35,734 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 19 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:37:35,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 91 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 06:37:35,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-29 06:37:35,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2023-11-29 06:37:35,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 46 states have internal predecessors, (48), 14 states have call successors, (14), 9 states have call predecessors, (14), 10 states have return successors, (14), 13 states have call predecessors, (14), 12 states have call successors, (14) [2023-11-29 06:37:35,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 76 transitions. [2023-11-29 06:37:35,750 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 76 transitions. Word has length 20 [2023-11-29 06:37:35,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:37:35,751 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 76 transitions. [2023-11-29 06:37:35,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 06:37:35,751 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 76 transitions. [2023-11-29 06:37:35,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-29 06:37:35,752 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:37:35,752 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:37:35,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 06:37:35,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:37:35,952 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:37:35,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:37:35,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1398908834, now seen corresponding path program 1 times [2023-11-29 06:37:35,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:37:35,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313938913] [2023-11-29 06:37:35,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:37:35,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:37:35,970 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:37:35,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1681076101] [2023-11-29 06:37:35,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:37:35,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:37:35,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:37:35,971 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:37:35,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 06:37:36,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:37:36,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 71 conjunts are in the unsatisfiable core [2023-11-29 06:37:36,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:37:36,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:37:36,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:37:36,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:37:36,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:37:36,620 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 06:37:36,620 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:37:36,806 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-29 06:37:36,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:37:36,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313938913] [2023-11-29 06:37:36,807 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:37:36,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681076101] [2023-11-29 06:37:36,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681076101] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:37:36,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:37:36,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 19 [2023-11-29 06:37:36,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712534022] [2023-11-29 06:37:36,807 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:37:36,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 06:37:36,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:37:36,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 06:37:36,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2023-11-29 06:37:36,809 INFO L87 Difference]: Start difference. First operand 69 states and 76 transitions. Second operand has 19 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 7 states have call successors, (12), 7 states have call predecessors, (12), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-29 06:37:37,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:37:37,551 INFO L93 Difference]: Finished difference Result 93 states and 104 transitions. [2023-11-29 06:37:37,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 06:37:37,552 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 7 states have call successors, (12), 7 states have call predecessors, (12), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 30 [2023-11-29 06:37:37,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:37:37,554 INFO L225 Difference]: With dead ends: 93 [2023-11-29 06:37:37,554 INFO L226 Difference]: Without dead ends: 91 [2023-11-29 06:37:37,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2023-11-29 06:37:37,556 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 70 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:37:37,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 155 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 06:37:37,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-11-29 06:37:37,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 77. [2023-11-29 06:37:37,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 52 states have internal predecessors, (53), 15 states have call successors, (15), 10 states have call predecessors, (15), 12 states have return successors, (19), 15 states have call predecessors, (19), 14 states have call successors, (19) [2023-11-29 06:37:37,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2023-11-29 06:37:37,594 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 30 [2023-11-29 06:37:37,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:37:37,595 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2023-11-29 06:37:37,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 7 states have call successors, (12), 7 states have call predecessors, (12), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-29 06:37:37,595 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2023-11-29 06:37:37,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-29 06:37:37,596 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:37:37,596 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:37:37,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 06:37:37,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:37:37,797 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:37:37,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:37:37,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1438102184, now seen corresponding path program 1 times [2023-11-29 06:37:37,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:37:37,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561743055] [2023-11-29 06:37:37,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:37:37,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:37:37,811 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:37:37,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1933202043] [2023-11-29 06:37:37,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:37:37,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:37:37,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:37:37,813 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:37:37,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 06:37:37,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:37:37,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 06:37:37,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:37:37,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:37:37,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:37:38,038 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 06:37:38,038 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:37:38,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:37:38,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561743055] [2023-11-29 06:37:38,039 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:37:38,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933202043] [2023-11-29 06:37:38,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933202043] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:37:38,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:37:38,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 06:37:38,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110063209] [2023-11-29 06:37:38,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:37:38,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 06:37:38,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:37:38,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 06:37:38,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:37:38,042 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 06:37:38,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:37:38,217 INFO L93 Difference]: Finished difference Result 91 states and 102 transitions. [2023-11-29 06:37:38,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 06:37:38,218 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2023-11-29 06:37:38,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:37:38,219 INFO L225 Difference]: With dead ends: 91 [2023-11-29 06:37:38,220 INFO L226 Difference]: Without dead ends: 89 [2023-11-29 06:37:38,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-29 06:37:38,221 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 13 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:37:38,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 52 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:37:38,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-11-29 06:37:38,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2023-11-29 06:37:38,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 57 states have internal predecessors, (58), 16 states have call successors, (16), 11 states have call predecessors, (16), 14 states have return successors, (21), 16 states have call predecessors, (21), 15 states have call successors, (21) [2023-11-29 06:37:38,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2023-11-29 06:37:38,242 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 30 [2023-11-29 06:37:38,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:37:38,242 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2023-11-29 06:37:38,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 06:37:38,243 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2023-11-29 06:37:38,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-29 06:37:38,244 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:37:38,244 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:37:38,249 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 06:37:38,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:37:38,445 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:37:38,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:37:38,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1300709659, now seen corresponding path program 1 times [2023-11-29 06:37:38,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:37:38,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036467377] [2023-11-29 06:37:38,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:37:38,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:37:38,459 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:37:38,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1772755870] [2023-11-29 06:37:38,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:37:38,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:37:38,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:37:38,461 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:37:38,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 06:37:38,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:37:38,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-29 06:37:38,555 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:37:38,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:37:38,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:37:38,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:37:38,852 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 06:37:38,852 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:37:44,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:37:44,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036467377] [2023-11-29 06:37:44,321 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:37:44,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772755870] [2023-11-29 06:37:44,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772755870] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:37:44,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:37:44,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-11-29 06:37:44,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964477266] [2023-11-29 06:37:44,322 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 06:37:44,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 06:37:44,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:37:44,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 06:37:44,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=349, Unknown=1, NotChecked=0, Total=420 [2023-11-29 06:37:44,323 INFO L87 Difference]: Start difference. First operand 85 states and 95 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), 4 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-29 06:37:44,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:37:44,866 INFO L93 Difference]: Finished difference Result 101 states and 110 transitions. [2023-11-29 06:37:44,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 06:37:44,867 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), 4 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2023-11-29 06:37:44,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:37:44,868 INFO L225 Difference]: With dead ends: 101 [2023-11-29 06:37:44,868 INFO L226 Difference]: Without dead ends: 97 [2023-11-29 06:37:44,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=143, Invalid=612, Unknown=1, NotChecked=0, Total=756 [2023-11-29 06:37:44,869 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 32 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 28 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:37:44,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 66 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 235 Invalid, 2 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 06:37:44,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-11-29 06:37:44,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2023-11-29 06:37:44,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 63 states have internal predecessors, (65), 18 states have call successors, (18), 13 states have call predecessors, (18), 15 states have return successors, (22), 18 states have call predecessors, (22), 16 states have call successors, (22) [2023-11-29 06:37:44,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 105 transitions. [2023-11-29 06:37:44,894 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 105 transitions. Word has length 36 [2023-11-29 06:37:44,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:37:44,895 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 105 transitions. [2023-11-29 06:37:44,895 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), 4 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-29 06:37:44,895 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 105 transitions. [2023-11-29 06:37:44,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-29 06:37:44,896 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:37:44,896 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:37:44,901 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 06:37:45,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 06:37:45,097 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:37:45,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:37:45,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1658463312, now seen corresponding path program 1 times [2023-11-29 06:37:45,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:37:45,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404916121] [2023-11-29 06:37:45,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:37:45,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:37:45,109 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:37:45,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1695788508] [2023-11-29 06:37:45,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:37:45,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:37:45,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:37:45,111 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:37:45,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 06:37:45,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:37:45,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-29 06:37:45,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:37:45,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:37:45,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:37:45,446 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 33 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-29 06:37:45,446 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:37:45,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:37:45,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404916121] [2023-11-29 06:37:45,761 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:37:45,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695788508] [2023-11-29 06:37:45,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695788508] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:37:45,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:37:45,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-11-29 06:37:45,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798725357] [2023-11-29 06:37:45,762 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 06:37:45,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 06:37:45,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:37:45,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 06:37:45,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2023-11-29 06:37:45,763 INFO L87 Difference]: Start difference. First operand 95 states and 105 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-29 06:37:46,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:37:46,170 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2023-11-29 06:37:46,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 06:37:46,170 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2023-11-29 06:37:46,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:37:46,171 INFO L225 Difference]: With dead ends: 97 [2023-11-29 06:37:46,171 INFO L226 Difference]: Without dead ends: 77 [2023-11-29 06:37:46,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2023-11-29 06:37:46,172 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 20 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 21 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:37:46,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 63 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 200 Invalid, 3 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 06:37:46,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-29 06:37:46,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2023-11-29 06:37:46,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 51 states have internal predecessors, (52), 15 states have call successors, (15), 10 states have call predecessors, (15), 12 states have return successors, (19), 15 states have call predecessors, (19), 14 states have call successors, (19) [2023-11-29 06:37:46,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2023-11-29 06:37:46,186 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 42 [2023-11-29 06:37:46,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:37:46,186 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2023-11-29 06:37:46,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-29 06:37:46,187 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2023-11-29 06:37:46,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-29 06:37:46,188 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:37:46,188 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 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 06:37:46,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 06:37:46,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:37:46,389 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:37:46,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:37:46,389 INFO L85 PathProgramCache]: Analyzing trace with hash 983693574, now seen corresponding path program 1 times [2023-11-29 06:37:46,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:37:46,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035088973] [2023-11-29 06:37:46,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:37:46,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:37:46,402 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:37:46,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1617572012] [2023-11-29 06:37:46,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:37:46,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:37:46,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:37:46,404 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:37:46,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 06:37:46,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:37:46,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-29 06:37:46,507 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:37:46,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:37:46,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:37:46,751 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:37:46,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:37:46,831 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-11-29 06:37:46,831 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:37:47,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 06:37:47,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:37:47,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035088973] [2023-11-29 06:37:47,250 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:37:47,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617572012] [2023-11-29 06:37:47,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617572012] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:37:47,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:37:47,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-11-29 06:37:47,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550125789] [2023-11-29 06:37:47,251 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 06:37:47,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 06:37:47,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:37:47,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 06:37:47,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-11-29 06:37:47,252 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand has 10 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-29 06:37:47,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:37:47,544 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2023-11-29 06:37:47,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 06:37:47,544 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 54 [2023-11-29 06:37:47,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:37:47,545 INFO L225 Difference]: With dead ends: 89 [2023-11-29 06:37:47,545 INFO L226 Difference]: Without dead ends: 87 [2023-11-29 06:37:47,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2023-11-29 06:37:47,546 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 15 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:37:47,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 58 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:37:47,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-11-29 06:37:47,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2023-11-29 06:37:47,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 55 states have internal predecessors, (56), 16 states have call successors, (16), 11 states have call predecessors, (16), 13 states have return successors, (20), 16 states have call predecessors, (20), 15 states have call successors, (20) [2023-11-29 06:37:47,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 92 transitions. [2023-11-29 06:37:47,565 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 92 transitions. Word has length 54 [2023-11-29 06:37:47,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:37:47,566 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 92 transitions. [2023-11-29 06:37:47,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-29 06:37:47,566 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 92 transitions. [2023-11-29 06:37:47,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-29 06:37:47,567 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:37:47,567 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:37:47,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-29 06:37:47,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:37:47,768 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:37:47,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:37:47,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1709019117, now seen corresponding path program 1 times [2023-11-29 06:37:47,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:37:47,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993651409] [2023-11-29 06:37:47,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:37:47,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:37:47,781 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:37:47,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [866588999] [2023-11-29 06:37:47,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:37:47,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:37:47,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:37:47,783 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:37:47,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 06:37:47,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:37:47,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 81 conjunts are in the unsatisfiable core [2023-11-29 06:37:47,887 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:37:47,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:37:47,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:37:47,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:37:48,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-11-29 06:37:48,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:37:48,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:37:48,588 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-11-29 06:37:48,588 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:37:53,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2023-11-29 06:37:53,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2023-11-29 06:37:53,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2023-11-29 06:37:54,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:37:54,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993651409] [2023-11-29 06:37:54,543 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:37:54,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866588999] [2023-11-29 06:37:54,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866588999] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:37:54,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:37:54,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-11-29 06:37:54,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88269509] [2023-11-29 06:37:54,544 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 06:37:54,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 06:37:54,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:37:54,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 06:37:54,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=512, Unknown=1, NotChecked=0, Total=600 [2023-11-29 06:37:54,545 INFO L87 Difference]: Start difference. First operand 83 states and 92 transitions. Second operand has 15 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-11-29 06:37:55,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:37:55,205 INFO L93 Difference]: Finished difference Result 99 states and 107 transitions. [2023-11-29 06:37:55,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 06:37:55,205 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 60 [2023-11-29 06:37:55,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:37:55,206 INFO L225 Difference]: With dead ends: 99 [2023-11-29 06:37:55,206 INFO L226 Difference]: Without dead ends: 95 [2023-11-29 06:37:55,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=165, Invalid=826, Unknown=1, NotChecked=0, Total=992 [2023-11-29 06:37:55,207 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 28 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 18 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:37:55,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 62 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 300 Invalid, 5 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 06:37:55,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-11-29 06:37:55,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2023-11-29 06:37:55,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 60 states have (on average 1.05) internal successors, (63), 61 states have internal predecessors, (63), 18 states have call successors, (18), 13 states have call predecessors, (18), 14 states have return successors, (21), 18 states have call predecessors, (21), 16 states have call successors, (21) [2023-11-29 06:37:55,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2023-11-29 06:37:55,222 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 60 [2023-11-29 06:37:55,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:37:55,223 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2023-11-29 06:37:55,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-11-29 06:37:55,223 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2023-11-29 06:37:55,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-29 06:37:55,224 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:37:55,224 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:37:55,228 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 06:37:55,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:37:55,424 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:37:55,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:37:55,425 INFO L85 PathProgramCache]: Analyzing trace with hash 308638302, now seen corresponding path program 1 times [2023-11-29 06:37:55,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:37:55,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225240372] [2023-11-29 06:37:55,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:37:55,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:37:55,438 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:37:55,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [640568208] [2023-11-29 06:37:55,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:37:55,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:37:55,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:37:55,440 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:37:55,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 06:37:55,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:37:55,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 106 conjunts are in the unsatisfiable core [2023-11-29 06:37:55,573 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:37:55,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:37:55,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:37:55,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:37:56,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:37:56,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:37:56,758 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 72 proven. 21 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-29 06:37:56,758 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:38:07,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:38:07,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225240372] [2023-11-29 06:38:07,505 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:38:07,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640568208] [2023-11-29 06:38:07,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640568208] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:38:07,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:38:07,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2023-11-29 06:38:07,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614833605] [2023-11-29 06:38:07,506 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 06:38:07,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 06:38:07,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:38:07,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 06:38:07,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=938, Unknown=1, NotChecked=0, Total=1056 [2023-11-29 06:38:07,507 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand has 22 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 18 states have internal predecessors, (33), 8 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2023-11-29 06:38:10,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:38:10,179 INFO L93 Difference]: Finished difference Result 95 states and 103 transitions. [2023-11-29 06:38:10,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 06:38:10,180 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 18 states have internal predecessors, (33), 8 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) Word has length 66 [2023-11-29 06:38:10,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:38:10,180 INFO L225 Difference]: With dead ends: 95 [2023-11-29 06:38:10,181 INFO L226 Difference]: Without dead ends: 73 [2023-11-29 06:38:10,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=289, Invalid=2062, Unknown=1, NotChecked=0, Total=2352 [2023-11-29 06:38:10,182 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 33 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 24 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 06:38:10,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 88 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 649 Invalid, 5 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 06:38:10,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-11-29 06:38:10,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2023-11-29 06:38:10,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 48 states have internal predecessors, (49), 15 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (17), 14 states have call predecessors, (17), 14 states have call successors, (17) [2023-11-29 06:38:10,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 81 transitions. [2023-11-29 06:38:10,199 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 81 transitions. Word has length 66 [2023-11-29 06:38:10,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:38:10,199 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 81 transitions. [2023-11-29 06:38:10,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 18 states have internal predecessors, (33), 8 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2023-11-29 06:38:10,199 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 81 transitions. [2023-11-29 06:38:10,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-11-29 06:38:10,200 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:38:10,201 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 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 06:38:10,207 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 06:38:10,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:38:10,401 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:38:10,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:38:10,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1776636980, now seen corresponding path program 2 times [2023-11-29 06:38:10,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:38:10,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122256157] [2023-11-29 06:38:10,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:38:10,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:38:10,417 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:38:10,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1907645518] [2023-11-29 06:38:10,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:38:10,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:38:10,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:38:10,418 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:38:10,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 06:38:10,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:38:10,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:38:10,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 78 conjunts are in the unsatisfiable core [2023-11-29 06:38:10,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:38:10,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:38:10,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:38:10,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:38:10,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:38:11,071 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2023-11-29 06:38:11,071 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:38:11,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 06:38:11,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2023-11-29 06:38:12,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:38:12,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122256157] [2023-11-29 06:38:12,218 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:38:12,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907645518] [2023-11-29 06:38:12,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907645518] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:38:12,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:38:12,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-11-29 06:38:12,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199382448] [2023-11-29 06:38:12,219 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 06:38:12,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 06:38:12,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:38:12,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 06:38:12,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2023-11-29 06:38:12,220 INFO L87 Difference]: Start difference. First operand 73 states and 81 transitions. Second operand has 12 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 6 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-11-29 06:38:12,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:38:12,613 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2023-11-29 06:38:12,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 06:38:12,614 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 6 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 78 [2023-11-29 06:38:12,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:38:12,615 INFO L225 Difference]: With dead ends: 87 [2023-11-29 06:38:12,615 INFO L226 Difference]: Without dead ends: 85 [2023-11-29 06:38:12,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2023-11-29 06:38:12,616 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 16 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:38:12,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 81 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 06:38:12,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-11-29 06:38:12,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2023-11-29 06:38:12,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 53 states have internal predecessors, (54), 16 states have call successors, (16), 11 states have call predecessors, (16), 12 states have return successors, (21), 16 states have call predecessors, (21), 15 states have call successors, (21) [2023-11-29 06:38:12,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2023-11-29 06:38:12,630 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 78 [2023-11-29 06:38:12,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:38:12,630 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2023-11-29 06:38:12,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 6 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-11-29 06:38:12,631 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2023-11-29 06:38:12,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-29 06:38:12,631 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:38:12,632 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:38:12,636 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 06:38:12,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:38:12,832 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:38:12,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:38:12,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1716814110, now seen corresponding path program 3 times [2023-11-29 06:38:12,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:38:12,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716089925] [2023-11-29 06:38:12,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:38:12,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:38:12,848 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:38:12,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [507782269] [2023-11-29 06:38:12,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:38:12,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:38:12,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:38:12,849 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:38:12,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 06:38:13,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 06:38:13,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:38:13,024 INFO L262 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 108 conjunts are in the unsatisfiable core [2023-11-29 06:38:13,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:38:13,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-29 06:38:13,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-29 06:38:13,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-11-29 06:38:13,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:38:13,732 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 140 proven. 45 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2023-11-29 06:38:13,733 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:38:18,342 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:38:18,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 91 [2023-11-29 06:38:18,353 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:38:18,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 99 [2023-11-29 06:38:19,793 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:38:19,793 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 91 [2023-11-29 06:38:19,803 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:38:19,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 99 [2023-11-29 06:38:20,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:38:20,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716089925] [2023-11-29 06:38:20,787 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:38:20,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507782269] [2023-11-29 06:38:20,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507782269] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:38:20,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:38:20,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2023-11-29 06:38:20,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900343085] [2023-11-29 06:38:20,788 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 06:38:20,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 06:38:20,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:38:20,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 06:38:20,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2023-11-29 06:38:20,789 INFO L87 Difference]: Start difference. First operand 81 states and 91 transitions. Second operand has 16 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 5 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-29 06:38:21,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:38:21,210 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2023-11-29 06:38:21,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 06:38:21,211 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 5 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 102 [2023-11-29 06:38:21,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:38:21,212 INFO L225 Difference]: With dead ends: 87 [2023-11-29 06:38:21,212 INFO L226 Difference]: Without dead ends: 85 [2023-11-29 06:38:21,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 103 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2023-11-29 06:38:21,213 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 36 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:38:21,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 62 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:38:21,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-11-29 06:38:21,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 77. [2023-11-29 06:38:21,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 50 states have (on average 1.04) internal successors, (52), 51 states have internal predecessors, (52), 15 states have call successors, (15), 11 states have call predecessors, (15), 11 states have return successors, (17), 14 states have call predecessors, (17), 14 states have call successors, (17) [2023-11-29 06:38:21,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 84 transitions. [2023-11-29 06:38:21,236 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 84 transitions. Word has length 102 [2023-11-29 06:38:21,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:38:21,236 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 84 transitions. [2023-11-29 06:38:21,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 5 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-29 06:38:21,237 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 84 transitions. [2023-11-29 06:38:21,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-29 06:38:21,238 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:38:21,238 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:38:21,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-29 06:38:21,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 06:38:21,439 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:38:21,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:38:21,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1670656193, now seen corresponding path program 2 times [2023-11-29 06:38:21,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:38:21,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621851616] [2023-11-29 06:38:21,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:38:21,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:38:21,454 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:38:21,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2145140010] [2023-11-29 06:38:21,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:38:21,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:38:21,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:38:21,456 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:38:21,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 06:38:21,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:38:21,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:38:21,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 150 conjunts are in the unsatisfiable core [2023-11-29 06:38:21,606 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:38:21,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:38:21,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:38:22,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:38:23,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:38:23,239 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 109 proven. 83 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-29 06:38:23,239 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:38:25,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 164 [2023-11-29 06:38:26,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:38:26,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621851616] [2023-11-29 06:38:26,724 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:38:26,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145140010] [2023-11-29 06:38:26,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145140010] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:38:26,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:38:26,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2023-11-29 06:38:26,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764300873] [2023-11-29 06:38:26,725 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 06:38:26,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 06:38:26,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:38:26,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 06:38:26,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2023-11-29 06:38:26,726 INFO L87 Difference]: Start difference. First operand 77 states and 84 transitions. Second operand has 25 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 22 states have internal predecessors, (41), 11 states have call successors, (14), 7 states have call predecessors, (14), 8 states have return successors, (13), 7 states have call predecessors, (13), 10 states have call successors, (13) [2023-11-29 06:38:29,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:38:29,587 INFO L93 Difference]: Finished difference Result 101 states and 109 transitions. [2023-11-29 06:38:29,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 06:38:29,588 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 22 states have internal predecessors, (41), 11 states have call successors, (14), 7 states have call predecessors, (14), 8 states have return successors, (13), 7 states have call predecessors, (13), 10 states have call successors, (13) Word has length 84 [2023-11-29 06:38:29,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:38:29,589 INFO L225 Difference]: With dead ends: 101 [2023-11-29 06:38:29,589 INFO L226 Difference]: Without dead ends: 97 [2023-11-29 06:38:29,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 69 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=444, Invalid=2748, Unknown=0, NotChecked=0, Total=3192 [2023-11-29 06:38:29,591 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 55 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 58 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:38:29,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 106 Invalid, 870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 807 Invalid, 5 Unknown, 0 Unchecked, 1.2s Time] [2023-11-29 06:38:29,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-11-29 06:38:29,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2023-11-29 06:38:29,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 62 states have (on average 1.032258064516129) internal successors, (64), 62 states have internal predecessors, (64), 18 states have call successors, (18), 14 states have call predecessors, (18), 14 states have return successors, (22), 18 states have call predecessors, (22), 16 states have call successors, (22) [2023-11-29 06:38:29,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 104 transitions. [2023-11-29 06:38:29,610 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 104 transitions. Word has length 84 [2023-11-29 06:38:29,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:38:29,610 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 104 transitions. [2023-11-29 06:38:29,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 22 states have internal predecessors, (41), 11 states have call successors, (14), 7 states have call predecessors, (14), 8 states have return successors, (13), 7 states have call predecessors, (13), 10 states have call successors, (13) [2023-11-29 06:38:29,611 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 104 transitions. [2023-11-29 06:38:29,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-29 06:38:29,611 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:38:29,612 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:38:29,616 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 06:38:29,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 06:38:29,812 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:38:29,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:38:29,813 INFO L85 PathProgramCache]: Analyzing trace with hash -519102225, now seen corresponding path program 3 times [2023-11-29 06:38:29,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:38:29,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682890318] [2023-11-29 06:38:29,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:38:29,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:38:29,832 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:38:29,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1169000433] [2023-11-29 06:38:29,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:38:29,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:38:29,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:38:29,834 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:38:29,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 06:38:30,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 06:38:30,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:38:30,219 INFO L262 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 184 conjunts are in the unsatisfiable core [2023-11-29 06:38:30,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:38:30,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:38:30,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:38:30,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:38:30,262 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-29 06:38:30,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-11-29 06:38:31,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:38:31,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:38:31,731 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 72 proven. 40 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2023-11-29 06:38:31,731 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:38:34,751 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2023-11-29 06:38:34,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2023-11-29 06:38:59,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:38:59,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682890318] [2023-11-29 06:38:59,207 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:38:59,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169000433] [2023-11-29 06:38:59,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169000433] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:38:59,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:38:59,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2023-11-29 06:38:59,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275446063] [2023-11-29 06:38:59,208 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 06:38:59,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 06:38:59,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:38:59,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 06:38:59,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=533, Unknown=3, NotChecked=0, Total=600 [2023-11-29 06:38:59,209 INFO L87 Difference]: Start difference. First operand 95 states and 104 transitions. Second operand has 16 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 15 states have internal predecessors, (29), 7 states have call successors, (11), 4 states have call predecessors, (11), 6 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2023-11-29 06:39:00,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:39:00,314 INFO L93 Difference]: Finished difference Result 119 states and 129 transitions. [2023-11-29 06:39:00,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 06:39:00,315 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 15 states have internal predecessors, (29), 7 states have call successors, (11), 4 states have call predecessors, (11), 6 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 108 [2023-11-29 06:39:00,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:39:00,316 INFO L225 Difference]: With dead ends: 119 [2023-11-29 06:39:00,316 INFO L226 Difference]: Without dead ends: 115 [2023-11-29 06:39:00,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 25.0s TimeCoverageRelationStatistics Valid=92, Invalid=717, Unknown=3, NotChecked=0, Total=812 [2023-11-29 06:39:00,317 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 19 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 11 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 06:39:00,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 110 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 442 Invalid, 3 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 06:39:00,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-11-29 06:39:00,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 97. [2023-11-29 06:39:00,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 18 states have call successors, (18), 14 states have call predecessors, (18), 15 states have return successors, (25), 19 states have call predecessors, (25), 16 states have call successors, (25) [2023-11-29 06:39:00,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 108 transitions. [2023-11-29 06:39:00,338 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 108 transitions. Word has length 108 [2023-11-29 06:39:00,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:39:00,338 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 108 transitions. [2023-11-29 06:39:00,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 15 states have internal predecessors, (29), 7 states have call successors, (11), 4 states have call predecessors, (11), 6 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2023-11-29 06:39:00,338 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 108 transitions. [2023-11-29 06:39:00,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-11-29 06:39:00,340 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:39:00,340 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:39:00,346 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 06:39:00,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:39:00,541 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:39:00,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:39:00,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1946968221, now seen corresponding path program 4 times [2023-11-29 06:39:00,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:39:00,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559753769] [2023-11-29 06:39:00,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:39:00,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:39:00,566 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:39:00,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1985351988] [2023-11-29 06:39:00,566 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:39:00,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:39:00,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:39:00,567 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:39:00,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 06:39:00,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:39:00,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:39:00,810 INFO L262 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 118 conjunts are in the unsatisfiable core [2023-11-29 06:39:00,817 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:39:01,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:39:01,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:39:01,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 21 [2023-11-29 06:39:01,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2023-11-29 06:39:01,644 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 191 proven. 39 refuted. 0 times theorem prover too weak. 398 trivial. 0 not checked. [2023-11-29 06:39:01,644 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:39:07,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 115 [2023-11-29 06:39:07,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 89 [2023-11-29 06:39:09,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 115 [2023-11-29 06:39:09,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 89 [2023-11-29 06:39:10,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 115 [2023-11-29 06:39:10,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 89 [2023-11-29 06:39:11,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:39:11,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559753769] [2023-11-29 06:39:11,765 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:39:11,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985351988] [2023-11-29 06:39:11,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985351988] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:39:11,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:39:11,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-11-29 06:39:11,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942578414] [2023-11-29 06:39:11,765 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 06:39:11,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 06:39:11,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:39:11,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 06:39:11,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2023-11-29 06:39:11,766 INFO L87 Difference]: Start difference. First operand 97 states and 108 transitions. Second operand has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 7 states have call successors, (11), 4 states have call predecessors, (11), 6 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) [2023-11-29 06:39:12,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:39:12,600 INFO L93 Difference]: Finished difference Result 103 states and 113 transitions. [2023-11-29 06:39:12,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 06:39:12,601 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 7 states have call successors, (11), 4 states have call predecessors, (11), 6 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) Word has length 132 [2023-11-29 06:39:12,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:39:12,602 INFO L225 Difference]: With dead ends: 103 [2023-11-29 06:39:12,602 INFO L226 Difference]: Without dead ends: 99 [2023-11-29 06:39:12,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 141 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=170, Invalid=886, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 06:39:12,604 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 39 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 29 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 06:39:12,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 54 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 340 Invalid, 2 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 06:39:12,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-11-29 06:39:12,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 79. [2023-11-29 06:39:12,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 15 states have call successors, (15), 12 states have call predecessors, (15), 11 states have return successors, (17), 14 states have call predecessors, (17), 14 states have call successors, (17) [2023-11-29 06:39:12,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 85 transitions. [2023-11-29 06:39:12,629 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 85 transitions. Word has length 132 [2023-11-29 06:39:12,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:39:12,629 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 85 transitions. [2023-11-29 06:39:12,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 7 states have call successors, (11), 4 states have call predecessors, (11), 6 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) [2023-11-29 06:39:12,630 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 85 transitions. [2023-11-29 06:39:12,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-29 06:39:12,631 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:39:12,631 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:39:12,636 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 06:39:12,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 06:39:12,831 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:39:12,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:39:12,832 INFO L85 PathProgramCache]: Analyzing trace with hash -469534580, now seen corresponding path program 2 times [2023-11-29 06:39:12,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:39:12,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475342885] [2023-11-29 06:39:12,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:39:12,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:39:12,845 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:39:12,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [915135381] [2023-11-29 06:39:12,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:39:12,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:39:12,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:39:12,846 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:39:12,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 06:39:13,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:39:13,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:39:13,021 INFO L262 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 156 conjunts are in the unsatisfiable core [2023-11-29 06:39:13,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:39:13,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:39:13,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:39:13,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:39:14,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:39:15,137 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 118 proven. 94 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-29 06:39:15,138 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:39:23,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 175 treesize of output 171 [2023-11-29 06:40:06,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:40:06,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475342885] [2023-11-29 06:40:06,389 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:40:06,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915135381] [2023-11-29 06:40:06,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915135381] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:40:06,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:40:06,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2023-11-29 06:40:06,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072819350] [2023-11-29 06:40:06,389 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 06:40:06,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 06:40:06,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:40:06,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 06:40:06,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=827, Unknown=5, NotChecked=0, Total=930 [2023-11-29 06:40:06,391 INFO L87 Difference]: Start difference. First operand 79 states and 85 transitions. Second operand has 24 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 21 states have internal predecessors, (39), 10 states have call successors, (15), 6 states have call predecessors, (15), 7 states have return successors, (14), 7 states have call predecessors, (14), 9 states have call successors, (14) [2023-11-29 06:40:18,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:40:18,212 INFO L93 Difference]: Finished difference Result 99 states and 106 transitions. [2023-11-29 06:40:18,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-29 06:40:18,213 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 21 states have internal predecessors, (39), 10 states have call successors, (15), 6 states have call predecessors, (15), 7 states have return successors, (14), 7 states have call predecessors, (14), 9 states have call successors, (14) Word has length 90 [2023-11-29 06:40:18,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:40:18,214 INFO L225 Difference]: With dead ends: 99 [2023-11-29 06:40:18,214 INFO L226 Difference]: Without dead ends: 81 [2023-11-29 06:40:18,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 80 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 46.5s TimeCoverageRelationStatistics Valid=388, Invalid=2574, Unknown=8, NotChecked=0, Total=2970 [2023-11-29 06:40:18,216 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 57 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 43 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:40:18,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 93 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 620 Invalid, 1 Unknown, 0 Unchecked, 1.2s Time] [2023-11-29 06:40:18,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-11-29 06:40:18,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2023-11-29 06:40:18,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 53 states have (on average 1.0188679245283019) internal successors, (54), 53 states have internal predecessors, (54), 15 states have call successors, (15), 12 states have call predecessors, (15), 12 states have return successors, (18), 15 states have call predecessors, (18), 14 states have call successors, (18) [2023-11-29 06:40:18,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2023-11-29 06:40:18,236 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 90 [2023-11-29 06:40:18,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:40:18,237 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2023-11-29 06:40:18,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 21 states have internal predecessors, (39), 10 states have call successors, (15), 6 states have call predecessors, (15), 7 states have return successors, (14), 7 states have call predecessors, (14), 9 states have call successors, (14) [2023-11-29 06:40:18,237 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2023-11-29 06:40:18,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-11-29 06:40:18,238 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:40:18,238 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:40:18,244 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 06:40:18,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 06:40:18,438 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:40:18,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:40:18,439 INFO L85 PathProgramCache]: Analyzing trace with hash 921243194, now seen corresponding path program 3 times [2023-11-29 06:40:18,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:40:18,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685650248] [2023-11-29 06:40:18,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:40:18,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:40:18,454 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:40:18,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1649723549] [2023-11-29 06:40:18,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:40:18,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:40:18,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:40:18,455 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:40:18,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 06:40:18,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 06:40:18,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:40:18,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 165 conjunts are in the unsatisfiable core [2023-11-29 06:40:18,803 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:40:18,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:40:18,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:40:18,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:40:19,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-29 06:40:23,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-29 06:40:36,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-11-29 06:40:36,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:40:50,053 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 161 proven. 109 refuted. 16 times theorem prover too weak. 175 trivial. 0 not checked. [2023-11-29 06:40:50,053 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:41:02,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 41 [2023-11-29 06:41:02,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 25 [2023-11-29 06:41:02,559 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-11-29 06:41:10,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:41:10,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685650248] [2023-11-29 06:41:10,785 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:41:10,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649723549] [2023-11-29 06:41:10,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649723549] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:41:10,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:41:10,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-11-29 06:41:10,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134542182] [2023-11-29 06:41:10,785 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 06:41:10,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 06:41:10,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:41:10,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 06:41:10,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=668, Unknown=8, NotChecked=0, Total=756 [2023-11-29 06:41:10,787 INFO L87 Difference]: Start difference. First operand 81 states and 87 transitions. Second operand has 20 states, 16 states have (on average 2.5) internal successors, (40), 18 states have internal predecessors, (40), 9 states have call successors, (15), 6 states have call predecessors, (15), 8 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) [2023-11-29 06:41:16,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 06:41:20,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 06:41:24,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 06:41:28,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 06:41:32,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 06:41:37,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:41:37,708 INFO L93 Difference]: Finished difference Result 101 states and 108 transitions. [2023-11-29 06:41:37,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 06:41:37,708 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 2.5) internal successors, (40), 18 states have internal predecessors, (40), 9 states have call successors, (15), 6 states have call predecessors, (15), 8 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) Word has length 114 [2023-11-29 06:41:37,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:41:37,709 INFO L225 Difference]: With dead ends: 101 [2023-11-29 06:41:37,709 INFO L226 Difference]: Without dead ends: 83 [2023-11-29 06:41:37,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 106 SyntacticMatches, 7 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 53.1s TimeCoverageRelationStatistics Valid=250, Invalid=1721, Unknown=9, NotChecked=0, Total=1980 [2023-11-29 06:41:37,711 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 26 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 21 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:41:37,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 123 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 542 Invalid, 5 Unknown, 0 Unchecked, 21.3s Time] [2023-11-29 06:41:37,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-11-29 06:41:37,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-11-29 06:41:37,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 15 states have call successors, (15), 12 states have call predecessors, (15), 13 states have return successors, (19), 16 states have call predecessors, (19), 14 states have call successors, (19) [2023-11-29 06:41:37,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2023-11-29 06:41:37,735 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 114 [2023-11-29 06:41:37,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:41:37,735 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2023-11-29 06:41:37,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 2.5) internal successors, (40), 18 states have internal predecessors, (40), 9 states have call successors, (15), 6 states have call predecessors, (15), 8 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) [2023-11-29 06:41:37,736 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2023-11-29 06:41:37,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-29 06:41:37,737 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:41:37,737 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:41:37,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-29 06:41:37,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 06:41:37,937 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:41:37,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:41:37,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1966560104, now seen corresponding path program 4 times [2023-11-29 06:41:37,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:41:37,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834016451] [2023-11-29 06:41:37,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:41:37,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:41:37,955 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:41:37,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1985200611] [2023-11-29 06:41:37,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:41:37,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:41:37,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:41:37,956 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:41:37,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 06:41:38,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:41:38,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:41:38,174 INFO L262 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 122 conjunts are in the unsatisfiable core [2023-11-29 06:41:38,178 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:41:38,468 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:41:38,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:41:39,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 26 [2023-11-29 06:41:39,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2023-11-29 06:41:39,083 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 215 proven. 28 refuted. 0 times theorem prover too weak. 451 trivial. 0 not checked. [2023-11-29 06:41:39,084 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:41:40,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 114 [2023-11-29 06:41:40,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 102 [2023-11-29 06:41:41,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 114 [2023-11-29 06:41:41,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 102 [2023-11-29 06:41:42,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 66 [2023-11-29 06:41:42,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 102 [2023-11-29 06:41:48,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:41:48,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834016451] [2023-11-29 06:41:48,306 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:41:48,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985200611] [2023-11-29 06:41:48,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985200611] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:41:48,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:41:48,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-11-29 06:41:48,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498193839] [2023-11-29 06:41:48,306 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 06:41:48,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 06:41:48,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:41:48,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 06:41:48,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=394, Unknown=1, NotChecked=0, Total=462 [2023-11-29 06:41:48,308 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand has 17 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 6 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2023-11-29 06:41:49,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:41:49,514 INFO L93 Difference]: Finished difference Result 83 states and 89 transitions. [2023-11-29 06:41:49,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 06:41:49,515 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 6 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 138 [2023-11-29 06:41:49,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:41:49,515 INFO L225 Difference]: With dead ends: 83 [2023-11-29 06:41:49,515 INFO L226 Difference]: Without dead ends: 0 [2023-11-29 06:41:49,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 151 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=153, Invalid=776, Unknown=1, NotChecked=0, Total=930 [2023-11-29 06:41:49,517 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 06:41:49,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 52 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 06:41:49,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-29 06:41:49,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-29 06:41:49,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:41:49,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-29 06:41:49,518 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 138 [2023-11-29 06:41:49,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:41:49,518 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-29 06:41:49,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 6 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2023-11-29 06:41:49,518 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-29 06:41:49,518 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-29 06:41:49,520 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-29 06:41:49,527 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 06:41:49,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 06:41:49,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-11-29 06:42:01,745 INFO L899 garLoopResultBuilder]: For program point L56(lines 56 62) no Hoare annotation was computed. [2023-11-29 06:42:01,745 INFO L895 garLoopResultBuilder]: At program point L55(line 55) the Hoare annotation is: (let ((.cse1 (select (select |old(#memory_int#1)| |func_to_recursive_line_29_to_40_0_#in~t.base|) |func_to_recursive_line_29_to_40_0_#in~t.offset|))) (or (let ((.cse0 (select (select |#memory_int#1| |func_to_recursive_line_29_to_40_0_#in~t.base|) |func_to_recursive_line_29_to_40_0_#in~t.offset|))) (and (= func_to_recursive_line_29_to_40_0_~t.offset |func_to_recursive_line_29_to_40_0_#in~t.offset|) (= (* |func_to_recursive_line_29_to_40_0_#t~mem11| 4) (+ (* 2 |func_to_recursive_line_29_to_40_0_#t~mem12|) (* |func_to_recursive_line_29_to_40_0_#t~mem9| |func_to_recursive_line_29_to_40_0_#t~mem10|) 1)) (= |#memory_int#2| |old(#memory_int#2)|) (= func_to_recursive_line_29_to_40_0_~t.base |func_to_recursive_line_29_to_40_0_#in~t.base|) (= func_to_recursive_line_29_to_40_0_~a.base |func_to_recursive_line_29_to_40_0_#in~a.base|) (= |#memory_int#1| |old(#memory_int#1)|) (= func_to_recursive_line_29_to_40_0_~s.offset |func_to_recursive_line_29_to_40_0_#in~s.offset|) (= |#memory_int#3| |old(#memory_int#3)|) (= (select (select |#memory_int#2| |func_to_recursive_line_29_to_40_0_#in~s.base|) |func_to_recursive_line_29_to_40_0_#in~s.offset|) |func_to_recursive_line_29_to_40_0_#t~mem11|) (= func_to_recursive_line_29_to_40_0_~a.offset |func_to_recursive_line_29_to_40_0_#in~a.offset|) (= |func_to_recursive_line_29_to_40_0_#t~mem12| .cse0) (= func_to_recursive_line_29_to_40_0_~s.base |func_to_recursive_line_29_to_40_0_#in~s.base|) (= |func_to_recursive_line_29_to_40_0_#t~mem9| .cse0))) (not (= (* (select (select |old(#memory_int#2)| |func_to_recursive_line_29_to_40_0_#in~s.base|) |func_to_recursive_line_29_to_40_0_#in~s.offset|) 4) (+ (* 2 .cse1) (* .cse1 .cse1) 1))) (not (= (+ (* (select (select |old(#memory_int#3)| |func_to_recursive_line_29_to_40_0_#in~a.base|) |func_to_recursive_line_29_to_40_0_#in~a.offset|) 2) 1) .cse1)))) [2023-11-29 06:42:01,745 INFO L895 garLoopResultBuilder]: At program point L54(line 54) the Hoare annotation is: (let ((.cse0 (select (select |old(#memory_int#1)| |func_to_recursive_line_29_to_40_0_#in~t.base|) |func_to_recursive_line_29_to_40_0_#in~t.offset|))) (or (not (= (* (select (select |old(#memory_int#2)| |func_to_recursive_line_29_to_40_0_#in~s.base|) |func_to_recursive_line_29_to_40_0_#in~s.offset|) 4) (+ (* 2 .cse0) (* .cse0 .cse0) 1))) (let ((.cse1 (select (select |#memory_int#3| |func_to_recursive_line_29_to_40_0_#in~a.base|) |func_to_recursive_line_29_to_40_0_#in~a.offset|))) (and (= func_to_recursive_line_29_to_40_0_~t.offset |func_to_recursive_line_29_to_40_0_#in~t.offset|) (= .cse1 |func_to_recursive_line_29_to_40_0_#t~mem7|) (= .cse1 |func_to_recursive_line_29_to_40_0_#t~mem6|) (= |#memory_int#2| |old(#memory_int#2)|) (= func_to_recursive_line_29_to_40_0_~t.base |func_to_recursive_line_29_to_40_0_#in~t.base|) (= func_to_recursive_line_29_to_40_0_~a.base |func_to_recursive_line_29_to_40_0_#in~a.base|) (= |#memory_int#1| |old(#memory_int#1)|) (= (+ |func_to_recursive_line_29_to_40_0_#t~mem7| |func_to_recursive_line_29_to_40_0_#t~mem6| (* |func_to_recursive_line_29_to_40_0_#t~mem7| |func_to_recursive_line_29_to_40_0_#t~mem6|) 1) |func_to_recursive_line_29_to_40_0_#t~mem8|) (= func_to_recursive_line_29_to_40_0_~s.offset |func_to_recursive_line_29_to_40_0_#in~s.offset|) (= |#memory_int#3| |old(#memory_int#3)|) (= func_to_recursive_line_29_to_40_0_~a.offset |func_to_recursive_line_29_to_40_0_#in~a.offset|) (= func_to_recursive_line_29_to_40_0_~s.base |func_to_recursive_line_29_to_40_0_#in~s.base|))) (not (= (+ (* (select (select |old(#memory_int#3)| |func_to_recursive_line_29_to_40_0_#in~a.base|) |func_to_recursive_line_29_to_40_0_#in~a.offset|) 2) 1) .cse0)))) [2023-11-29 06:42:01,746 INFO L899 garLoopResultBuilder]: For program point L55-1(line 55) no Hoare annotation was computed. [2023-11-29 06:42:01,746 INFO L895 garLoopResultBuilder]: At program point L53(line 53) the Hoare annotation is: (let ((.cse0 (select (select |old(#memory_int#3)| |func_to_recursive_line_29_to_40_0_#in~a.base|) |func_to_recursive_line_29_to_40_0_#in~a.offset|)) (.cse1 (select (select |old(#memory_int#1)| |func_to_recursive_line_29_to_40_0_#in~t.base|) |func_to_recursive_line_29_to_40_0_#in~t.offset|))) (or (and (= func_to_recursive_line_29_to_40_0_~t.offset |func_to_recursive_line_29_to_40_0_#in~t.offset|) (= |#memory_int#2| |old(#memory_int#2)|) (= func_to_recursive_line_29_to_40_0_~t.base |func_to_recursive_line_29_to_40_0_#in~t.base|) (= func_to_recursive_line_29_to_40_0_~a.base |func_to_recursive_line_29_to_40_0_#in~a.base|) (= .cse0 |func_to_recursive_line_29_to_40_0_#t~mem4|) (= |#memory_int#1| |old(#memory_int#1)|) (= (+ (* 2 |func_to_recursive_line_29_to_40_0_#t~mem4|) 1) |func_to_recursive_line_29_to_40_0_#t~mem5|) (= func_to_recursive_line_29_to_40_0_~s.offset |func_to_recursive_line_29_to_40_0_#in~s.offset|) (= |#memory_int#3| |old(#memory_int#3)|) (= func_to_recursive_line_29_to_40_0_~a.offset |func_to_recursive_line_29_to_40_0_#in~a.offset|) (= func_to_recursive_line_29_to_40_0_~s.base |func_to_recursive_line_29_to_40_0_#in~s.base|)) (not (= (* (select (select |old(#memory_int#2)| |func_to_recursive_line_29_to_40_0_#in~s.base|) |func_to_recursive_line_29_to_40_0_#in~s.offset|) 4) (+ (* 2 .cse1) (* .cse1 .cse1) 1))) (not (= (+ (* .cse0 2) 1) .cse1)))) [2023-11-29 06:42:01,746 INFO L899 garLoopResultBuilder]: For program point L54-1(line 54) no Hoare annotation was computed. [2023-11-29 06:42:01,746 INFO L899 garLoopResultBuilder]: For program point L53-1(line 53) no Hoare annotation was computed. [2023-11-29 06:42:01,746 INFO L899 garLoopResultBuilder]: For program point L50(lines 50 71) no Hoare annotation was computed. [2023-11-29 06:42:01,746 INFO L899 garLoopResultBuilder]: For program point L50-1(lines 48 72) no Hoare annotation was computed. [2023-11-29 06:42:01,746 INFO L895 garLoopResultBuilder]: At program point $Ultimate##0(lines 48 72) the Hoare annotation is: (let ((.cse0 (select (select |old(#memory_int#1)| |func_to_recursive_line_29_to_40_0_#in~t.base|) |func_to_recursive_line_29_to_40_0_#in~t.offset|))) (or (and (= |#memory_int#2| |old(#memory_int#2)|) (= |#memory_int#1| |old(#memory_int#1)|) (= |#memory_int#3| |old(#memory_int#3)|)) (not (= (* (select (select |old(#memory_int#2)| |func_to_recursive_line_29_to_40_0_#in~s.base|) |func_to_recursive_line_29_to_40_0_#in~s.offset|) 4) (+ (* 2 .cse0) (* .cse0 .cse0) 1))) (not (= (+ (* (select (select |old(#memory_int#3)| |func_to_recursive_line_29_to_40_0_#in~a.base|) |func_to_recursive_line_29_to_40_0_#in~a.offset|) 2) 1) .cse0)))) [2023-11-29 06:42:01,746 INFO L899 garLoopResultBuilder]: For program point func_to_recursive_line_29_to_40_0EXIT(lines 48 72) no Hoare annotation was computed. [2023-11-29 06:42:01,746 INFO L895 garLoopResultBuilder]: At program point L67(line 67) the Hoare annotation is: (let ((.cse3 (select |old(#memory_int#1)| |func_to_recursive_line_29_to_40_0_#in~t.base|))) (let ((.cse0 (select .cse3 |func_to_recursive_line_29_to_40_0_#in~t.offset|))) (or (not (= (* (select (select |old(#memory_int#2)| |func_to_recursive_line_29_to_40_0_#in~s.base|) |func_to_recursive_line_29_to_40_0_#in~s.offset|) 4) (+ (* 2 .cse0) (* .cse0 .cse0) 1))) (and (= func_to_recursive_line_29_to_40_0_~t.offset |func_to_recursive_line_29_to_40_0_#in~t.offset|) (= |#memory_int#3| (store |old(#memory_int#3)| func_to_recursive_line_29_to_40_0_~a.base (let ((.cse1 (select |old(#memory_int#3)| func_to_recursive_line_29_to_40_0_~a.base))) (store .cse1 func_to_recursive_line_29_to_40_0_~a.offset (+ (select .cse1 func_to_recursive_line_29_to_40_0_~a.offset) 1))))) (= func_to_recursive_line_29_to_40_0_~t.base |func_to_recursive_line_29_to_40_0_#in~t.base|) (= (select (select |#memory_int#2| |func_to_recursive_line_29_to_40_0_#in~s.base|) |func_to_recursive_line_29_to_40_0_#in~s.offset|) (let ((.cse2 (select (select |#memory_int#3| |func_to_recursive_line_29_to_40_0_#in~a.base|) |func_to_recursive_line_29_to_40_0_#in~a.offset|))) (+ (* 2 .cse2) (* .cse2 .cse2) 1))) (= |#memory_int#1| (store |old(#memory_int#1)| |func_to_recursive_line_29_to_40_0_#in~t.base| (store .cse3 |func_to_recursive_line_29_to_40_0_#in~t.offset| (+ 2 .cse0)))) (= func_to_recursive_line_29_to_40_0_~s.offset |func_to_recursive_line_29_to_40_0_#in~s.offset|) (= |#memory_int#2| (store |old(#memory_int#2)| func_to_recursive_line_29_to_40_0_~s.base (let ((.cse4 (select |old(#memory_int#2)| func_to_recursive_line_29_to_40_0_~s.base))) (store .cse4 func_to_recursive_line_29_to_40_0_~s.offset (+ (select (select |#memory_int#1| func_to_recursive_line_29_to_40_0_~t.base) func_to_recursive_line_29_to_40_0_~t.offset) (select .cse4 func_to_recursive_line_29_to_40_0_~s.offset)))))) (= func_to_recursive_line_29_to_40_0_~s.base |func_to_recursive_line_29_to_40_0_#in~s.base|)) (not (= (+ (* (select (select |old(#memory_int#3)| |func_to_recursive_line_29_to_40_0_#in~a.base|) |func_to_recursive_line_29_to_40_0_#in~a.offset|) 2) 1) .cse0))))) [2023-11-29 06:42:01,747 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-11-29 06:42:01,747 INFO L895 garLoopResultBuilder]: At program point L87(line 87) the Hoare annotation is: (let ((.cse1 (select |#memory_int#1| |ULTIMATE.start_main_~#t~0#1.base|)) (.cse3 (select (select |#memory_int#2| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|)) (.cse4 (select |#memory_int#3| |ULTIMATE.start_main_~#a~0#1.base|))) (or (let ((.cse2 (select .cse4 0))) (let ((.cse0 (* 2 .cse2))) (and (= |ULTIMATE.start_main_#t~mem26#1| |ULTIMATE.start_main_#t~mem25#1|) (= (+ .cse0 1) (select .cse1 0)) (= (+ (* |ULTIMATE.start_main_#t~mem25#1| |ULTIMATE.start_main_#t~mem25#1|) (* 2 |ULTIMATE.start_main_#t~mem25#1|) 1) (* |ULTIMATE.start_main_#t~mem27#1| 4)) (= |ULTIMATE.start_main_~#t~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem28#1| |ULTIMATE.start_main_#t~mem25#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= (+ .cse0 (* .cse2 .cse2) 1) .cse3)))) (and (= |ULTIMATE.start_main_#t~mem26#1| 1) (= (select .cse1 |ULTIMATE.start_main_~#t~0#1.offset|) 1) (= |ULTIMATE.start_main_#t~mem27#1| 1) (= 1 .cse3) (= |ULTIMATE.start_main_#t~mem28#1| 1) (= |ULTIMATE.start_main_#t~mem25#1| 1) (= (select .cse4 |ULTIMATE.start_main_~#a~0#1.offset|) 0)))) [2023-11-29 06:42:01,747 INFO L895 garLoopResultBuilder]: At program point L86(line 86) the Hoare annotation is: (let ((.cse0 (select |#memory_int#1| |ULTIMATE.start_main_~#t~0#1.base|)) (.cse1 (select (select |#memory_int#2| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|)) (.cse2 (select |#memory_int#3| |ULTIMATE.start_main_~#a~0#1.base|))) (or (and (= (select .cse0 |ULTIMATE.start_main_~#t~0#1.offset|) 1) (= |ULTIMATE.start_main_#t~mem22#1| 0) (= 1 .cse1) (= |ULTIMATE.start_main_#t~mem24#1| 1) (= (select .cse2 |ULTIMATE.start_main_~#a~0#1.offset|) 0) (= |ULTIMATE.start_main_#t~mem23#1| 0)) (let ((.cse4 (select .cse2 0))) (let ((.cse3 (* 2 .cse4))) (and (= |ULTIMATE.start_main_#t~mem24#1| (+ (* 2 |ULTIMATE.start_main_#t~mem22#1|) (* |ULTIMATE.start_main_#t~mem22#1| |ULTIMATE.start_main_#t~mem22#1|) 1)) (= (+ .cse3 1) (select .cse0 0)) (= |ULTIMATE.start_main_~#t~0#1.offset| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem22#1|) (= (+ .cse3 (* .cse4 .cse4) 1) .cse1)))))) [2023-11-29 06:42:01,747 INFO L899 garLoopResultBuilder]: For program point L87-1(line 87) no Hoare annotation was computed. [2023-11-29 06:42:01,747 INFO L895 garLoopResultBuilder]: At program point L85(line 85) the Hoare annotation is: (let ((.cse0 (select |#memory_int#3| |ULTIMATE.start_main_~#a~0#1.base|))) (let ((.cse1 (select |#memory_int#1| |ULTIMATE.start_main_~#t~0#1.base|)) (.cse3 (select (select |#memory_int#2| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|)) (.cse2 (select .cse0 |ULTIMATE.start_main_~#a~0#1.offset|))) (or (and (= (+ (* 2 (select .cse0 0)) 1) (select .cse1 0)) (= (+ (* .cse2 2) (* .cse2 .cse2) 1) .cse3) (= |ULTIMATE.start_main_~#t~0#1.offset| 0) (= (+ (* 2 |ULTIMATE.start_main_#t~mem20#1|) 1) |ULTIMATE.start_main_#t~mem21#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0)) (and (= |ULTIMATE.start_main_#t~mem20#1| 0) (= (select .cse1 |ULTIMATE.start_main_~#t~0#1.offset|) 1) (= 1 .cse3) (= .cse2 0) (= |ULTIMATE.start_main_#t~mem21#1| 1))))) [2023-11-29 06:42:01,747 INFO L899 garLoopResultBuilder]: For program point L86-1(line 86) no Hoare annotation was computed. [2023-11-29 06:42:01,747 INFO L895 garLoopResultBuilder]: At program point L84(line 84) the Hoare annotation is: (and (= (select (select |#memory_int#2| |ULTIMATE.start_main_~#s~0#1.base|) 0) 1) (= |ULTIMATE.start_main_~#t~0#1.offset| 0) (not (= 2 |ULTIMATE.start_main_~#a~0#1.base|)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= (select (select |#memory_int#3| |ULTIMATE.start_main_~#a~0#1.base|) 0) 0) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= (select (select |#memory_int#1| |ULTIMATE.start_main_~#t~0#1.base|) 0) 1)) [2023-11-29 06:42:01,747 INFO L899 garLoopResultBuilder]: For program point L85-1(line 85) no Hoare annotation was computed. [2023-11-29 06:42:01,747 INFO L899 garLoopResultBuilder]: For program point L84-1(line 84) no Hoare annotation was computed. [2023-11-29 06:42:01,747 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-11-29 06:42:01,747 INFO L899 garLoopResultBuilder]: For program point L34-2(lines 32 46) no Hoare annotation was computed. [2023-11-29 06:42:01,747 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 32 46) no Hoare annotation was computed. [2023-11-29 06:42:01,747 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 32 46) the Hoare annotation is: true [2023-11-29 06:42:01,748 INFO L899 garLoopResultBuilder]: For program point L36(lines 36 39) no Hoare annotation was computed. [2023-11-29 06:42:01,748 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 38) no Hoare annotation was computed. [2023-11-29 06:42:01,748 INFO L899 garLoopResultBuilder]: For program point L34(lines 34 44) no Hoare annotation was computed. [2023-11-29 06:42:01,750 INFO L445 BasicCegarLoop]: Path program histogram: [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:42:01,751 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-29 06:42:01,754 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 06:42:01 BoogieIcfgContainer [2023-11-29 06:42:01,754 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-29 06:42:01,755 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-29 06:42:01,755 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-29 06:42:01,755 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-29 06:42:01,755 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:37:18" (3/4) ... [2023-11-29 06:42:01,756 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-29 06:42:01,759 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure func_to_recursive_line_29_to_40_0 [2023-11-29 06:42:01,759 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2023-11-29 06:42:01,764 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2023-11-29 06:42:01,764 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2023-11-29 06:42:01,764 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-11-29 06:42:01,765 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-29 06:42:01,837 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/witness.graphml [2023-11-29 06:42:01,838 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/witness.yml [2023-11-29 06:42:01,838 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-29 06:42:01,839 INFO L158 Benchmark]: Toolchain (without parser) took 283880.22ms. Allocated memory was 161.5MB in the beginning and 195.0MB in the end (delta: 33.6MB). Free memory was 128.7MB in the beginning and 113.0MB in the end (delta: 15.8MB). Peak memory consumption was 52.3MB. Max. memory is 16.1GB. [2023-11-29 06:42:01,839 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 111.1MB. Free memory was 79.6MB in the beginning and 79.5MB in the end (delta: 27.3kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 06:42:01,839 INFO L158 Benchmark]: CACSL2BoogieTranslator took 226.74ms. Allocated memory is still 161.5MB. Free memory was 128.0MB in the beginning and 117.0MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-29 06:42:01,839 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.39ms. Allocated memory is still 161.5MB. Free memory was 117.0MB in the beginning and 115.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-29 06:42:01,840 INFO L158 Benchmark]: Boogie Preprocessor took 34.33ms. Allocated memory is still 161.5MB. Free memory was 115.6MB in the beginning and 113.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-29 06:42:01,840 INFO L158 Benchmark]: RCFGBuilder took 351.49ms. Allocated memory is still 161.5MB. Free memory was 113.5MB in the beginning and 97.4MB in the end (delta: 16.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-11-29 06:42:01,840 INFO L158 Benchmark]: TraceAbstraction took 283147.42ms. Allocated memory was 161.5MB in the beginning and 195.0MB in the end (delta: 33.6MB). Free memory was 96.7MB in the beginning and 118.2MB in the end (delta: -21.5MB). Peak memory consumption was 92.1MB. Max. memory is 16.1GB. [2023-11-29 06:42:01,841 INFO L158 Benchmark]: Witness Printer took 83.39ms. Allocated memory is still 195.0MB. Free memory was 118.2MB in the beginning and 113.0MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-29 06:42:01,842 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 111.1MB. Free memory was 79.6MB in the beginning and 79.5MB in the end (delta: 27.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 226.74ms. Allocated memory is still 161.5MB. Free memory was 128.0MB in the beginning and 117.0MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 30.39ms. Allocated memory is still 161.5MB. Free memory was 117.0MB in the beginning and 115.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 34.33ms. Allocated memory is still 161.5MB. Free memory was 115.6MB in the beginning and 113.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 351.49ms. Allocated memory is still 161.5MB. Free memory was 113.5MB in the beginning and 97.4MB in the end (delta: 16.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 283147.42ms. Allocated memory was 161.5MB in the beginning and 195.0MB in the end (delta: 33.6MB). Free memory was 96.7MB in the beginning and 118.2MB in the end (delta: -21.5MB). Peak memory consumption was 92.1MB. Max. memory is 16.1GB. * Witness Printer took 83.39ms. Allocated memory is still 195.0MB. Free memory was 118.2MB in the beginning and 113.0MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 38]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 283.1s, OverallIterations: 18, TraceHistogramMax: 18, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 65.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 12.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 33 mSolverCounterUnknown, 617 SdHoareTripleChecker+Valid, 37.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 599 mSDsluCounter, 1516 SdHoareTripleChecker+Invalid, 36.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1250 mSDsCounter, 430 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6193 IncrementalHoareTripleChecker+Invalid, 6656 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 430 mSolverCounterUnsat, 266 mSDtfsCounter, 6193 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1724 GetRequests, 1163 SyntacticMatches, 42 SemanticMatches, 519 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3476 ImplicationChecksByTransitivity, 167.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=97occurred in iteration=14, InterpolantAutomatonStates: 287, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 18 MinimizatonAttempts, 91 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 10 LocationsWithAnnotation, 54 PreInvPairs, 78 NumberOfFragments, 802 HoareAnnotationTreeSize, 54 FomulaSimplifications, 3558 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 10 FomulaSimplificationsInter, 14125 FormulaSimplificationTreeSizeReductionInter, 11.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 198.7s InterpolantComputationTime, 1206 NumberOfCodeBlocks, 1120 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 1249 ConstructedInterpolants, 133 QuantifiedInterpolants, 16268 SizeOfPredicates, 428 NumberOfNonLiveVariables, 5648 ConjunctsInSsa, 1581 ConjunctsInUnsatCore, 21 InterpolantComputations, 3 PerfectInterpolantSequences, 3203/3746 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-29 06:42:02,052 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forcibly destroying the process [2023-11-29 06:42:02,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ee5c109-831a-4a6c-8ed9-f13e203cf4dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 137 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE