./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound5.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_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/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_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/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_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/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 74e9855722264d342377b8ab219a69c32c582cc628f82167488f3dea5640534c --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 06:01:41,534 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 06:01:41,595 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 06:01:41,599 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 06:01:41,600 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 06:01:41,621 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 06:01:41,622 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 06:01:41,622 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 06:01:41,623 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 06:01:41,623 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 06:01:41,624 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 06:01:41,624 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 06:01:41,625 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 06:01:41,625 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 06:01:41,626 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 06:01:41,627 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 06:01:41,627 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 06:01:41,628 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 06:01:41,628 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 06:01:41,629 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 06:01:41,629 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 06:01:41,631 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 06:01:41,632 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 06:01:41,632 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 06:01:41,633 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 06:01:41,633 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 06:01:41,634 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 06:01:41,634 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 06:01:41,635 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 06:01:41,635 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 06:01:41,635 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 06:01:41,636 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:01:41,636 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 06:01:41,636 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 06:01:41,637 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 06:01:41,637 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 06:01:41,637 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 06:01:41,637 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 06:01:41,637 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 06:01:41,638 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 06:01:41,638 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 06:01:41,638 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 06:01:41,638 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_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 74e9855722264d342377b8ab219a69c32c582cc628f82167488f3dea5640534c [2023-11-29 06:01:41,836 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 06:01:41,856 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 06:01:41,858 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 06:01:41,860 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 06:01:41,860 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 06:01:41,861 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound5.c [2023-11-29 06:01:44,663 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 06:01:44,825 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 06:01:44,826 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound5.c [2023-11-29 06:01:44,835 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/data/7e236ae55/5b6d3b6edd944ec1a560ce32226cccda/FLAG358159818 [2023-11-29 06:01:44,847 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/data/7e236ae55/5b6d3b6edd944ec1a560ce32226cccda [2023-11-29 06:01:44,850 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 06:01:44,851 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 06:01:44,853 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 06:01:44,853 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 06:01:44,857 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 06:01:44,858 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:01:44" (1/1) ... [2023-11-29 06:01:44,859 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11b1e9eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:01:44, skipping insertion in model container [2023-11-29 06:01:44,859 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:01:44" (1/1) ... [2023-11-29 06:01:44,878 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 06:01:45,006 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_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound5.c[490,503] [2023-11-29 06:01:45,027 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:01:45,037 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 06:01:45,046 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_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound5.c[490,503] [2023-11-29 06:01:45,056 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:01:45,069 INFO L206 MainTranslator]: Completed translation [2023-11-29 06:01:45,069 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:01:45 WrapperNode [2023-11-29 06:01:45,070 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 06:01:45,071 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 06:01:45,071 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 06:01:45,071 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 06:01:45,078 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:01:45" (1/1) ... [2023-11-29 06:01:45,084 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:01:45" (1/1) ... [2023-11-29 06:01:45,100 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 86 [2023-11-29 06:01:45,101 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 06:01:45,101 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 06:01:45,101 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 06:01:45,102 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 06:01:45,110 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:01:45" (1/1) ... [2023-11-29 06:01:45,110 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:01:45" (1/1) ... [2023-11-29 06:01:45,112 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:01:45" (1/1) ... [2023-11-29 06:01:45,121 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-29 06:01:45,121 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:01:45" (1/1) ... [2023-11-29 06:01:45,121 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:01:45" (1/1) ... [2023-11-29 06:01:45,124 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:01:45" (1/1) ... [2023-11-29 06:01:45,127 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:01:45" (1/1) ... [2023-11-29 06:01:45,128 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:01:45" (1/1) ... [2023-11-29 06:01:45,129 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:01:45" (1/1) ... [2023-11-29 06:01:45,130 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 06:01:45,131 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 06:01:45,131 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 06:01:45,131 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 06:01:45,132 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:01:45" (1/1) ... [2023-11-29 06:01:45,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:01:45,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:01:45,155 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 06:01:45,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 06:01:45,183 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 06:01:45,184 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 06:01:45,184 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 06:01:45,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 06:01:45,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 06:01:45,184 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 06:01:45,184 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-29 06:01:45,184 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-29 06:01:45,243 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 06:01:45,245 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 06:01:45,404 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 06:01:45,430 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 06:01:45,431 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-29 06:01:45,431 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:01:45 BoogieIcfgContainer [2023-11-29 06:01:45,431 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 06:01:45,434 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 06:01:45,434 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 06:01:45,437 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 06:01:45,437 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:01:44" (1/3) ... [2023-11-29 06:01:45,438 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d7578f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:01:45, skipping insertion in model container [2023-11-29 06:01:45,438 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:01:45" (2/3) ... [2023-11-29 06:01:45,439 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d7578f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:01:45, skipping insertion in model container [2023-11-29 06:01:45,439 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:01:45" (3/3) ... [2023-11-29 06:01:45,440 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound5.c [2023-11-29 06:01:45,454 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 06:01:45,455 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 06:01:45,497 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 06:01:45,502 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;@1ed36dec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 06:01:45,503 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 06:01:45,506 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 19 states have internal predecessors, (26), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-29 06:01:45,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-29 06:01:45,513 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:01:45,514 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:01:45,514 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:01:45,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:01:45,519 INFO L85 PathProgramCache]: Analyzing trace with hash -689848145, now seen corresponding path program 1 times [2023-11-29 06:01:45,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:01:45,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564586939] [2023-11-29 06:01:45,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:01:45,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:01:45,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:01:45,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:01:45,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564586939] [2023-11-29 06:01:45,637 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 06:01:45,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572414990] [2023-11-29 06:01:45,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:01:45,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:01:45,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:01:45,642 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:01:45,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 06:01:45,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:01:45,720 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 06:01:45,725 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:01:45,745 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-29 06:01:45,746 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:01:45,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572414990] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:01:45,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:01:45,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:01:45,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401484396] [2023-11-29 06:01:45,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:01:45,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 06:01:45,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:01:45,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 06:01:45,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 06:01:45,780 INFO L87 Difference]: Start difference. First operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 19 states have internal predecessors, (26), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 06:01:45,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:01:45,803 INFO L93 Difference]: Finished difference Result 60 states and 99 transitions. [2023-11-29 06:01:45,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 06:01:45,806 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2023-11-29 06:01:45,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:01:45,812 INFO L225 Difference]: With dead ends: 60 [2023-11-29 06:01:45,812 INFO L226 Difference]: Without dead ends: 29 [2023-11-29 06:01:45,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 06:01:45,817 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:01:45,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:01:45,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-29 06:01:45,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-11-29 06:01:45,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 16 states have (on average 1.3125) internal successors, (21), 18 states have internal predecessors, (21), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-29 06:01:45,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2023-11-29 06:01:45,852 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 27 [2023-11-29 06:01:45,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:01:45,853 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2023-11-29 06:01:45,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 06:01:45,854 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2023-11-29 06:01:45,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-29 06:01:45,855 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:01:45,855 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:01:45,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 06:01:46,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-29 06:01:46,060 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:01:46,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:01:46,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1989097615, now seen corresponding path program 1 times [2023-11-29 06:01:46,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:01:46,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354494803] [2023-11-29 06:01:46,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:01:46,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:01:46,104 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:01:46,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1717039373] [2023-11-29 06:01:46,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:01:46,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:01:46,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:01:46,106 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:01:46,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 06:01:46,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:01:46,178 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 06:01:46,181 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:01:46,263 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 06:01:46,263 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:01:46,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:01:46,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354494803] [2023-11-29 06:01:46,264 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:01:46,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717039373] [2023-11-29 06:01:46,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717039373] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:01:46,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:01:46,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:01:46,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778627278] [2023-11-29 06:01:46,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:01:46,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:01:46,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:01:46,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:01:46,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:01:46,267 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 06:01:46,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:01:46,288 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2023-11-29 06:01:46,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:01:46,288 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2023-11-29 06:01:46,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:01:46,290 INFO L225 Difference]: With dead ends: 39 [2023-11-29 06:01:46,290 INFO L226 Difference]: Without dead ends: 31 [2023-11-29 06:01:46,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:01:46,292 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:01:46,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 97 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:01:46,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-29 06:01:46,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-11-29 06:01:46,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 19 states have internal predecessors, (23), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-29 06:01:46,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2023-11-29 06:01:46,302 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 28 [2023-11-29 06:01:46,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:01:46,303 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2023-11-29 06:01:46,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 06:01:46,304 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2023-11-29 06:01:46,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-29 06:01:46,305 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:01:46,305 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:01:46,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 06:01:46,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:01:46,508 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:01:46,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:01:46,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1539070609, now seen corresponding path program 1 times [2023-11-29 06:01:46,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:01:46,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469839666] [2023-11-29 06:01:46,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:01:46,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:01:46,526 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:01:46,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1183375258] [2023-11-29 06:01:46,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:01:46,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:01:46,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:01:46,528 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:01:46,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 06:01:46,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:01:46,586 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 06:01:46,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:01:46,642 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 06:01:46,643 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:01:46,734 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 06:01:46,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:01:46,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469839666] [2023-11-29 06:01:46,735 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:01:46,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183375258] [2023-11-29 06:01:46,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183375258] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:01:46,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:01:46,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2023-11-29 06:01:46,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869237195] [2023-11-29 06:01:46,736 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:01:46,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 06:01:46,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:01:46,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 06:01:46,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:01:46,738 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 06:01:46,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:01:46,824 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2023-11-29 06:01:46,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:01:46,825 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2023-11-29 06:01:46,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:01:46,826 INFO L225 Difference]: With dead ends: 48 [2023-11-29 06:01:46,827 INFO L226 Difference]: Without dead ends: 40 [2023-11-29 06:01:46,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-29 06:01:46,829 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 29 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:01:46,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 97 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:01:46,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-29 06:01:46,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2023-11-29 06:01:46,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-29 06:01:46,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2023-11-29 06:01:46,841 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 29 [2023-11-29 06:01:46,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:01:46,841 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2023-11-29 06:01:46,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 06:01:46,842 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2023-11-29 06:01:46,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-29 06:01:46,843 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:01:46,843 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:01:46,849 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 06:01:47,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-29 06:01:47,049 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:01:47,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:01:47,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1634889762, now seen corresponding path program 1 times [2023-11-29 06:01:47,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:01:47,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053753036] [2023-11-29 06:01:47,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:01:47,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:01:47,065 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:01:47,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [263445347] [2023-11-29 06:01:47,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:01:47,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:01:47,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:01:47,067 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:01:47,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 06:01:47,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:01:47,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 06:01:47,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:01:47,234 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 06:01:47,234 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:01:47,310 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 06:01:47,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:01:47,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053753036] [2023-11-29 06:01:47,311 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:01:47,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263445347] [2023-11-29 06:01:47,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263445347] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 06:01:47,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:01:47,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2023-11-29 06:01:47,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141282959] [2023-11-29 06:01:47,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:01:47,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:01:47,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:01:47,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:01:47,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-11-29 06:01:47,314 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 06:01:47,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:01:47,369 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2023-11-29 06:01:47,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:01:47,370 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 31 [2023-11-29 06:01:47,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:01:47,371 INFO L225 Difference]: With dead ends: 38 [2023-11-29 06:01:47,371 INFO L226 Difference]: Without dead ends: 36 [2023-11-29 06:01:47,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-11-29 06:01:47,373 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 8 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:01:47,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 116 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:01:47,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-29 06:01:47,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-11-29 06:01:47,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 23 states have internal predecessors, (27), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-29 06:01:47,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2023-11-29 06:01:47,384 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 31 [2023-11-29 06:01:47,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:01:47,385 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2023-11-29 06:01:47,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 06:01:47,385 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2023-11-29 06:01:47,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-29 06:01:47,386 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:01:47,387 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:01:47,391 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 06:01:47,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:01:47,587 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:01:47,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:01:47,588 INFO L85 PathProgramCache]: Analyzing trace with hash 753217482, now seen corresponding path program 1 times [2023-11-29 06:01:47,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:01:47,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932843258] [2023-11-29 06:01:47,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:01:47,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:01:47,602 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:01:47,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1280386659] [2023-11-29 06:01:47,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:01:47,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:01:47,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:01:47,603 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:01:47,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 06:01:47,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:01:47,663 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 06:01:47,665 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:01:47,712 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 06:01:47,712 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:01:47,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:01:47,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932843258] [2023-11-29 06:01:47,712 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:01:47,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280386659] [2023-11-29 06:01:47,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280386659] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:01:47,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:01:47,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 06:01:47,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63991874] [2023-11-29 06:01:47,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:01:47,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:01:47,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:01:47,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:01:47,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:01:47,715 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 06:01:47,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:01:47,737 INFO L93 Difference]: Finished difference Result 61 states and 79 transitions. [2023-11-29 06:01:47,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:01:47,738 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 34 [2023-11-29 06:01:47,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:01:47,739 INFO L225 Difference]: With dead ends: 61 [2023-11-29 06:01:47,739 INFO L226 Difference]: Without dead ends: 38 [2023-11-29 06:01:47,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:01:47,741 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:01:47,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 119 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:01:47,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-29 06:01:47,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-11-29 06:01:47,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-29 06:01:47,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2023-11-29 06:01:47,751 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 34 [2023-11-29 06:01:47,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:01:47,751 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2023-11-29 06:01:47,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 06:01:47,752 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2023-11-29 06:01:47,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-29 06:01:47,753 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:01:47,753 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:01:47,758 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 06:01:47,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:01:47,958 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:01:47,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:01:47,958 INFO L85 PathProgramCache]: Analyzing trace with hash 120049922, now seen corresponding path program 1 times [2023-11-29 06:01:47,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:01:47,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122764706] [2023-11-29 06:01:47,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:01:47,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:01:47,971 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:01:47,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1616715915] [2023-11-29 06:01:47,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:01:47,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:01:47,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:01:47,973 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:01:47,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 06:01:48,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:01:48,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 06:01:48,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:01:48,292 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 06:01:48,293 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:01:48,419 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 06:01:48,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:01:48,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122764706] [2023-11-29 06:01:48,420 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:01:48,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616715915] [2023-11-29 06:01:48,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616715915] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 06:01:48,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:01:48,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2023-11-29 06:01:48,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757165386] [2023-11-29 06:01:48,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:01:48,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:01:48,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:01:48,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:01:48,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-11-29 06:01:48,423 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 06:01:48,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:01:48,477 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2023-11-29 06:01:48,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:01:48,477 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2023-11-29 06:01:48,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:01:48,478 INFO L225 Difference]: With dead ends: 52 [2023-11-29 06:01:48,478 INFO L226 Difference]: Without dead ends: 50 [2023-11-29 06:01:48,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-11-29 06:01:48,480 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 7 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:01:48,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 133 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:01:48,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-29 06:01:48,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2023-11-29 06:01:48,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 31 states have internal predecessors, (37), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-29 06:01:48,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 64 transitions. [2023-11-29 06:01:48,493 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 64 transitions. Word has length 36 [2023-11-29 06:01:48,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:01:48,494 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 64 transitions. [2023-11-29 06:01:48,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 06:01:48,494 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 64 transitions. [2023-11-29 06:01:48,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-29 06:01:48,495 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:01:48,495 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 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 06:01:48,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 06:01:48,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 06:01:48,696 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:01:48,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:01:48,696 INFO L85 PathProgramCache]: Analyzing trace with hash 391757342, now seen corresponding path program 1 times [2023-11-29 06:01:48,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:01:48,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181969476] [2023-11-29 06:01:48,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:01:48,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:01:48,704 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:01:48,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [731643703] [2023-11-29 06:01:48,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:01:48,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:01:48,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:01:48,705 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:01:48,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 06:01:48,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:01:48,755 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 06:01:48,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:01:48,979 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-29 06:01:48,979 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:01:49,090 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-29 06:01:49,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:01:49,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181969476] [2023-11-29 06:01:49,090 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:01:49,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731643703] [2023-11-29 06:01:49,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731643703] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 06:01:49,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:01:49,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2023-11-29 06:01:49,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371411809] [2023-11-29 06:01:49,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:01:49,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:01:49,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:01:49,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:01:49,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-11-29 06:01:49,093 INFO L87 Difference]: Start difference. First operand 49 states and 64 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-29 06:01:49,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:01:49,155 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2023-11-29 06:01:49,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:01:49,157 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 41 [2023-11-29 06:01:49,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:01:49,159 INFO L225 Difference]: With dead ends: 56 [2023-11-29 06:01:49,159 INFO L226 Difference]: Without dead ends: 54 [2023-11-29 06:01:49,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-11-29 06:01:49,160 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 7 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:01:49,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 124 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:01:49,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-29 06:01:49,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2023-11-29 06:01:49,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-29 06:01:49,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2023-11-29 06:01:49,175 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 41 [2023-11-29 06:01:49,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:01:49,175 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2023-11-29 06:01:49,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-29 06:01:49,176 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2023-11-29 06:01:49,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-29 06:01:49,177 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:01:49,177 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:01:49,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 06:01:49,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:01:49,382 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:01:49,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:01:49,383 INFO L85 PathProgramCache]: Analyzing trace with hash 439925314, now seen corresponding path program 1 times [2023-11-29 06:01:49,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:01:49,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231455402] [2023-11-29 06:01:49,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:01:49,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:01:49,393 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:01:49,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1204244221] [2023-11-29 06:01:49,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:01:49,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:01:49,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:01:49,395 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:01:49,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 06:01:49,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:01:49,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 06:01:49,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:01:49,616 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 06:01:49,616 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:01:50,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:01:50,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231455402] [2023-11-29 06:01:50,215 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:01:50,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204244221] [2023-11-29 06:01:50,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204244221] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:01:50,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:01:50,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-11-29 06:01:50,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48081621] [2023-11-29 06:01:50,216 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 06:01:50,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 06:01:50,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:01:50,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 06:01:50,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=68, Unknown=1, NotChecked=0, Total=90 [2023-11-29 06:01:50,217 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-29 06:01:50,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:01:50,334 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2023-11-29 06:01:50,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 06:01:50,334 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2023-11-29 06:01:50,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:01:50,336 INFO L225 Difference]: With dead ends: 60 [2023-11-29 06:01:50,336 INFO L226 Difference]: Without dead ends: 58 [2023-11-29 06:01:50,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=34, Invalid=97, Unknown=1, NotChecked=0, Total=132 [2023-11-29 06:01:50,337 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 13 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:01:50,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 121 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:01:50,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-29 06:01:50,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2023-11-29 06:01:50,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 37 states have internal predecessors, (43), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-29 06:01:50,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2023-11-29 06:01:50,351 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 46 [2023-11-29 06:01:50,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:01:50,352 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2023-11-29 06:01:50,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-29 06:01:50,352 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2023-11-29 06:01:50,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-29 06:01:50,353 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:01:50,353 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:01:50,359 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 06:01:50,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:01:50,559 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:01:50,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:01:50,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1428774585, now seen corresponding path program 1 times [2023-11-29 06:01:50,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:01:50,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818181998] [2023-11-29 06:01:50,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:01:50,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:01:50,571 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:01:50,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1904856283] [2023-11-29 06:01:50,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:01:50,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:01:50,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:01:50,572 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:01:50,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 06:01:50,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:01:50,637 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 06:01:50,640 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:01:50,718 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-29 06:01:50,718 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:01:50,790 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-29 06:01:50,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:01:50,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818181998] [2023-11-29 06:01:50,791 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:01:50,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904856283] [2023-11-29 06:01:50,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904856283] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:01:50,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:01:50,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2023-11-29 06:01:50,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202130436] [2023-11-29 06:01:50,792 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:01:50,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 06:01:50,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:01:50,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 06:01:50,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-29 06:01:50,793 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 4 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-29 06:01:50,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:01:50,935 INFO L93 Difference]: Finished difference Result 168 states and 197 transitions. [2023-11-29 06:01:50,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 06:01:50,936 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 4 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 55 [2023-11-29 06:01:50,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:01:50,938 INFO L225 Difference]: With dead ends: 168 [2023-11-29 06:01:50,939 INFO L226 Difference]: Without dead ends: 160 [2023-11-29 06:01:50,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2023-11-29 06:01:50,940 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 49 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:01:50,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 133 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:01:50,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-11-29 06:01:50,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 154. [2023-11-29 06:01:50,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 99 states have (on average 1.1818181818181819) internal successors, (117), 102 states have internal predecessors, (117), 34 states have call successors, (34), 20 states have call predecessors, (34), 20 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-11-29 06:01:50,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 182 transitions. [2023-11-29 06:01:50,973 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 182 transitions. Word has length 55 [2023-11-29 06:01:50,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:01:50,974 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 182 transitions. [2023-11-29 06:01:50,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 4 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-29 06:01:50,974 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 182 transitions. [2023-11-29 06:01:50,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-29 06:01:50,975 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:01:50,975 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:01:50,981 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 06:01:51,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:01:51,179 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:01:51,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:01:51,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1348925863, now seen corresponding path program 1 times [2023-11-29 06:01:51,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:01:51,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922512409] [2023-11-29 06:01:51,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:01:51,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:01:51,189 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:01:51,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1459753354] [2023-11-29 06:01:51,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:01:51,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:01:51,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:01:51,190 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:01:51,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 06:01:51,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:01:51,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 06:01:51,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:01:51,309 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-29 06:01:51,309 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:01:51,399 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-29 06:01:51,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:01:51,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922512409] [2023-11-29 06:01:51,400 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:01:51,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459753354] [2023-11-29 06:01:51,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459753354] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:01:51,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:01:51,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-11-29 06:01:51,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082605207] [2023-11-29 06:01:51,400 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:01:51,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 06:01:51,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:01:51,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 06:01:51,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-29 06:01:51,402 INFO L87 Difference]: Start difference. First operand 154 states and 182 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-29 06:01:51,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:01:51,622 INFO L93 Difference]: Finished difference Result 220 states and 287 transitions. [2023-11-29 06:01:51,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 06:01:51,623 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 56 [2023-11-29 06:01:51,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:01:51,625 INFO L225 Difference]: With dead ends: 220 [2023-11-29 06:01:51,626 INFO L226 Difference]: Without dead ends: 206 [2023-11-29 06:01:51,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 99 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-11-29 06:01:51,627 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 69 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:01:51,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 323 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:01:51,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2023-11-29 06:01:51,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 184. [2023-11-29 06:01:51,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 120 states have (on average 1.2166666666666666) internal successors, (146), 122 states have internal predecessors, (146), 44 states have call successors, (44), 19 states have call predecessors, (44), 19 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2023-11-29 06:01:51,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 232 transitions. [2023-11-29 06:01:51,669 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 232 transitions. Word has length 56 [2023-11-29 06:01:51,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:01:51,670 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 232 transitions. [2023-11-29 06:01:51,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-29 06:01:51,670 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 232 transitions. [2023-11-29 06:01:51,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-29 06:01:51,671 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:01:51,671 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:01:51,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-29 06:01:51,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 06:01:51,872 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:01:51,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:01:51,872 INFO L85 PathProgramCache]: Analyzing trace with hash -848672706, now seen corresponding path program 1 times [2023-11-29 06:01:51,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:01:51,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430125737] [2023-11-29 06:01:51,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:01:51,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:01:51,882 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:01:51,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2028958275] [2023-11-29 06:01:51,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:01:51,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:01:51,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:01:51,884 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:01:51,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 06:01:51,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:01:51,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 06:01:51,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:01:52,009 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-29 06:01:52,009 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:01:52,072 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-29 06:01:52,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:01:52,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430125737] [2023-11-29 06:01:52,073 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:01:52,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028958275] [2023-11-29 06:01:52,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028958275] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:01:52,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:01:52,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2023-11-29 06:01:52,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448824429] [2023-11-29 06:01:52,073 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:01:52,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 06:01:52,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:01:52,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 06:01:52,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-29 06:01:52,075 INFO L87 Difference]: Start difference. First operand 184 states and 232 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 4 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-29 06:01:52,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:01:52,191 INFO L93 Difference]: Finished difference Result 264 states and 345 transitions. [2023-11-29 06:01:52,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 06:01:52,192 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 4 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 58 [2023-11-29 06:01:52,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:01:52,194 INFO L225 Difference]: With dead ends: 264 [2023-11-29 06:01:52,194 INFO L226 Difference]: Without dead ends: 192 [2023-11-29 06:01:52,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-11-29 06:01:52,196 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 36 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:01:52,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 126 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:01:52,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2023-11-29 06:01:52,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 190. [2023-11-29 06:01:52,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 126 states have (on average 1.1825396825396826) internal successors, (149), 128 states have internal predecessors, (149), 44 states have call successors, (44), 19 states have call predecessors, (44), 19 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2023-11-29 06:01:52,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 235 transitions. [2023-11-29 06:01:52,224 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 235 transitions. Word has length 58 [2023-11-29 06:01:52,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:01:52,224 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 235 transitions. [2023-11-29 06:01:52,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 4 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-29 06:01:52,225 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 235 transitions. [2023-11-29 06:01:52,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-29 06:01:52,226 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:01:52,226 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:01:52,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-29 06:01:52,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 06:01:52,427 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:01:52,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:01:52,428 INFO L85 PathProgramCache]: Analyzing trace with hash -421956392, now seen corresponding path program 1 times [2023-11-29 06:01:52,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:01:52,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570281850] [2023-11-29 06:01:52,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:01:52,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:01:52,437 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:01:52,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [943417600] [2023-11-29 06:01:52,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:01:52,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:01:52,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:01:52,438 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:01:52,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 06:01:52,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:01:52,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-29 06:01:52,510 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:01:52,626 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 23 proven. 12 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-29 06:01:52,627 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:01:52,745 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-29 06:01:52,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:01:52,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570281850] [2023-11-29 06:01:52,746 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:01:52,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943417600] [2023-11-29 06:01:52,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943417600] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:01:52,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:01:52,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2023-11-29 06:01:52,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893308402] [2023-11-29 06:01:52,746 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:01:52,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 06:01:52,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:01:52,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 06:01:52,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-11-29 06:01:52,748 INFO L87 Difference]: Start difference. First operand 190 states and 235 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 6 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2023-11-29 06:01:53,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:01:53,036 INFO L93 Difference]: Finished difference Result 267 states and 353 transitions. [2023-11-29 06:01:53,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 06:01:53,039 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 6 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 63 [2023-11-29 06:01:53,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:01:53,042 INFO L225 Difference]: With dead ends: 267 [2023-11-29 06:01:53,043 INFO L226 Difference]: Without dead ends: 262 [2023-11-29 06:01:53,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-11-29 06:01:53,044 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 50 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:01:53,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 343 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:01:53,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2023-11-29 06:01:53,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 232. [2023-11-29 06:01:53,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 154 states have (on average 1.2142857142857142) internal successors, (187), 162 states have internal predecessors, (187), 56 states have call successors, (56), 21 states have call predecessors, (56), 21 states have return successors, (53), 48 states have call predecessors, (53), 53 states have call successors, (53) [2023-11-29 06:01:53,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 296 transitions. [2023-11-29 06:01:53,078 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 296 transitions. Word has length 63 [2023-11-29 06:01:53,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:01:53,079 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 296 transitions. [2023-11-29 06:01:53,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 6 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2023-11-29 06:01:53,079 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 296 transitions. [2023-11-29 06:01:53,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-29 06:01:53,080 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:01:53,080 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:01:53,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-29 06:01:53,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 06:01:53,283 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:01:53,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:01:53,284 INFO L85 PathProgramCache]: Analyzing trace with hash -245166072, now seen corresponding path program 2 times [2023-11-29 06:01:53,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:01:53,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571440832] [2023-11-29 06:01:53,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:01:53,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:01:53,292 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:01:53,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [113916566] [2023-11-29 06:01:53,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:01:53,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:01:53,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:01:53,294 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:01:53,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 06:01:53,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:01:53,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:01:53,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-29 06:01:53,371 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:01:53,847 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 26 proven. 21 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-29 06:01:53,848 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:01:53,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:01:53,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571440832] [2023-11-29 06:01:53,960 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:01:53,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113916566] [2023-11-29 06:01:53,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113916566] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:01:53,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:01:53,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-11-29 06:01:53,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923791701] [2023-11-29 06:01:53,961 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 06:01:53,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 06:01:53,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:01:53,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 06:01:53,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2023-11-29 06:01:53,963 INFO L87 Difference]: Start difference. First operand 232 states and 296 transitions. Second operand has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2023-11-29 06:01:54,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:01:54,293 INFO L93 Difference]: Finished difference Result 251 states and 319 transitions. [2023-11-29 06:01:54,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 06:01:54,300 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 68 [2023-11-29 06:01:54,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:01:54,302 INFO L225 Difference]: With dead ends: 251 [2023-11-29 06:01:54,302 INFO L226 Difference]: Without dead ends: 249 [2023-11-29 06:01:54,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2023-11-29 06:01:54,303 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 85 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:01:54,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 198 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:01:54,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2023-11-29 06:01:54,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 247. [2023-11-29 06:01:54,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 163 states have (on average 1.2147239263803682) internal successors, (198), 171 states have internal predecessors, (198), 60 states have call successors, (60), 23 states have call predecessors, (60), 23 states have return successors, (57), 52 states have call predecessors, (57), 57 states have call successors, (57) [2023-11-29 06:01:54,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 315 transitions. [2023-11-29 06:01:54,348 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 315 transitions. Word has length 68 [2023-11-29 06:01:54,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:01:54,348 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 315 transitions. [2023-11-29 06:01:54,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2023-11-29 06:01:54,348 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 315 transitions. [2023-11-29 06:01:54,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-29 06:01:54,349 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:01:54,350 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:01:54,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-29 06:01:54,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:01:54,550 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:01:54,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:01:54,551 INFO L85 PathProgramCache]: Analyzing trace with hash -441972072, now seen corresponding path program 3 times [2023-11-29 06:01:54,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:01:54,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873238066] [2023-11-29 06:01:54,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:01:54,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:01:54,559 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:01:54,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [821914636] [2023-11-29 06:01:54,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:01:54,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:01:54,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:01:54,560 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:01:54,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 06:01:54,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 06:01:54,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:01:54,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-29 06:01:54,627 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:01:55,344 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 37 proven. 16 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-29 06:01:55,344 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:01:56,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:01:56,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873238066] [2023-11-29 06:01:56,233 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:01:56,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821914636] [2023-11-29 06:01:56,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821914636] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:01:56,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:01:56,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-11-29 06:01:56,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733627242] [2023-11-29 06:01:56,234 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 06:01:56,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 06:01:56,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:01:56,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 06:01:56,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2023-11-29 06:01:56,235 INFO L87 Difference]: Start difference. First operand 247 states and 315 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2023-11-29 06:01:57,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:01:57,468 INFO L93 Difference]: Finished difference Result 259 states and 326 transitions. [2023-11-29 06:01:57,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 06:01:57,468 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 73 [2023-11-29 06:01:57,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:01:57,470 INFO L225 Difference]: With dead ends: 259 [2023-11-29 06:01:57,470 INFO L226 Difference]: Without dead ends: 255 [2023-11-29 06:01:57,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2023-11-29 06:01:57,472 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 50 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 06:01:57,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 261 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 06:01:57,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2023-11-29 06:01:57,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 253. [2023-11-29 06:01:57,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 168 states have (on average 1.2023809523809523) internal successors, (202), 175 states have internal predecessors, (202), 60 states have call successors, (60), 25 states have call predecessors, (60), 24 states have return successors, (57), 52 states have call predecessors, (57), 57 states have call successors, (57) [2023-11-29 06:01:57,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 319 transitions. [2023-11-29 06:01:57,520 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 319 transitions. Word has length 73 [2023-11-29 06:01:57,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:01:57,520 INFO L495 AbstractCegarLoop]: Abstraction has 253 states and 319 transitions. [2023-11-29 06:01:57,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2023-11-29 06:01:57,521 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 319 transitions. [2023-11-29 06:01:57,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-11-29 06:01:57,522 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:01:57,522 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:01:57,527 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 06:01:57,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 06:01:57,722 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:01:57,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:01:57,723 INFO L85 PathProgramCache]: Analyzing trace with hash 2054740817, now seen corresponding path program 1 times [2023-11-29 06:01:57,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:01:57,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395385503] [2023-11-29 06:01:57,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:01:57,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:01:57,730 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:01:57,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1076957718] [2023-11-29 06:01:57,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:01:57,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:01:57,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:01:57,732 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:01:57,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 06:01:57,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:01:57,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-29 06:01:57,794 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:01:58,337 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2023-11-29 06:01:58,337 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:01:59,041 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-11-29 06:01:59,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:01:59,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395385503] [2023-11-29 06:01:59,041 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:01:59,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076957718] [2023-11-29 06:01:59,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076957718] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:01:59,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:01:59,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2023-11-29 06:01:59,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061904885] [2023-11-29 06:01:59,042 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:01:59,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 06:01:59,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:01:59,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 06:01:59,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2023-11-29 06:01:59,044 INFO L87 Difference]: Start difference. First operand 253 states and 319 transitions. Second operand has 21 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2023-11-29 06:02:08,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:02:08,176 INFO L93 Difference]: Finished difference Result 399 states and 553 transitions. [2023-11-29 06:02:08,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-29 06:02:08,176 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 79 [2023-11-29 06:02:08,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:02:08,178 INFO L225 Difference]: With dead ends: 399 [2023-11-29 06:02:08,179 INFO L226 Difference]: Without dead ends: 393 [2023-11-29 06:02:08,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=375, Invalid=1605, Unknown=0, NotChecked=0, Total=1980 [2023-11-29 06:02:08,180 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 150 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:02:08,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 625 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-11-29 06:02:08,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2023-11-29 06:02:08,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 358. [2023-11-29 06:02:08,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 228 states have (on average 1.2763157894736843) internal successors, (291), 237 states have internal predecessors, (291), 103 states have call successors, (103), 26 states have call predecessors, (103), 26 states have return successors, (101), 94 states have call predecessors, (101), 101 states have call successors, (101) [2023-11-29 06:02:08,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 495 transitions. [2023-11-29 06:02:08,270 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 495 transitions. Word has length 79 [2023-11-29 06:02:08,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:02:08,270 INFO L495 AbstractCegarLoop]: Abstraction has 358 states and 495 transitions. [2023-11-29 06:02:08,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2023-11-29 06:02:08,271 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 495 transitions. [2023-11-29 06:02:08,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-29 06:02:08,272 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:02:08,272 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2023-11-29 06:02:08,278 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 06:02:08,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 06:02:08,473 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:02:08,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:02:08,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1270806006, now seen corresponding path program 1 times [2023-11-29 06:02:08,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:02:08,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550786697] [2023-11-29 06:02:08,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:02:08,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:02:08,484 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:02:08,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [863790752] [2023-11-29 06:02:08,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:02:08,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:02:08,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:02:08,485 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:02:08,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 06:02:08,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:02:08,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 06:02:08,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:02:08,580 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2023-11-29 06:02:08,580 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:02:08,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:02:08,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550786697] [2023-11-29 06:02:08,581 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:02:08,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863790752] [2023-11-29 06:02:08,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863790752] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:02:08,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:02:08,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 06:02:08,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262828699] [2023-11-29 06:02:08,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:02:08,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:02:08,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:02:08,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:02:08,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:02:08,582 INFO L87 Difference]: Start difference. First operand 358 states and 495 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-29 06:02:08,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:02:08,753 INFO L93 Difference]: Finished difference Result 571 states and 838 transitions. [2023-11-29 06:02:08,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:02:08,754 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 88 [2023-11-29 06:02:08,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:02:08,757 INFO L225 Difference]: With dead ends: 571 [2023-11-29 06:02:08,757 INFO L226 Difference]: Without dead ends: 402 [2023-11-29 06:02:08,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:02:08,758 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 12 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:02:08,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 171 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:02:08,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2023-11-29 06:02:08,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 359. [2023-11-29 06:02:08,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 227 states have (on average 1.2687224669603525) internal successors, (288), 233 states have internal predecessors, (288), 105 states have call successors, (105), 26 states have call predecessors, (105), 26 states have return successors, (103), 99 states have call predecessors, (103), 103 states have call successors, (103) [2023-11-29 06:02:08,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 496 transitions. [2023-11-29 06:02:08,870 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 496 transitions. Word has length 88 [2023-11-29 06:02:08,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:02:08,870 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 496 transitions. [2023-11-29 06:02:08,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-29 06:02:08,870 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 496 transitions. [2023-11-29 06:02:08,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-29 06:02:08,872 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:02:08,872 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:02:08,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-29 06:02:09,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:02:09,073 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:02:09,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:02:09,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1858222944, now seen corresponding path program 1 times [2023-11-29 06:02:09,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:02:09,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493097534] [2023-11-29 06:02:09,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:02:09,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:02:09,082 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:02:09,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [192687167] [2023-11-29 06:02:09,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:02:09,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:02:09,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:02:09,084 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:02:09,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 06:02:09,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:02:09,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-29 06:02:09,161 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:02:10,238 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2023-11-29 06:02:10,238 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:02:16,243 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 51 proven. 23 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2023-11-29 06:02:16,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:02:16,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493097534] [2023-11-29 06:02:16,243 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:02:16,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192687167] [2023-11-29 06:02:16,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192687167] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:02:16,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:02:16,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2023-11-29 06:02:16,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318855880] [2023-11-29 06:02:16,244 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:02:16,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 06:02:16,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:02:16,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 06:02:16,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2023-11-29 06:02:16,245 INFO L87 Difference]: Start difference. First operand 359 states and 496 transitions. Second operand has 22 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 19 states have internal predecessors, (52), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) [2023-11-29 06:02:30,542 WARN L293 SmtUtils]: Spent 11.72s on a formula simplification that was a NOOP. DAG size: 69 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 06:02:45,390 WARN L293 SmtUtils]: Spent 8.78s on a formula simplification that was a NOOP. DAG size: 59 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 06:02:50,703 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 06:03:13,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 06:03:15,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:03:15,220 INFO L93 Difference]: Finished difference Result 452 states and 635 transitions. [2023-11-29 06:03:15,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-29 06:03:15,221 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 19 states have internal predecessors, (52), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) Word has length 96 [2023-11-29 06:03:15,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:03:15,223 INFO L225 Difference]: With dead ends: 452 [2023-11-29 06:03:15,223 INFO L226 Difference]: Without dead ends: 450 [2023-11-29 06:03:15,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 49.6s TimeCoverageRelationStatistics Valid=356, Invalid=1281, Unknown=3, NotChecked=0, Total=1640 [2023-11-29 06:03:15,225 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 143 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 98 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:03:15,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 413 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 421 Invalid, 2 Unknown, 0 Unchecked, 14.0s Time] [2023-11-29 06:03:15,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2023-11-29 06:03:15,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 425. [2023-11-29 06:03:15,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 270 states have (on average 1.2925925925925925) internal successors, (349), 277 states have internal predecessors, (349), 127 states have call successors, (127), 27 states have call predecessors, (127), 27 states have return successors, (125), 120 states have call predecessors, (125), 125 states have call successors, (125) [2023-11-29 06:03:15,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 601 transitions. [2023-11-29 06:03:15,405 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 601 transitions. Word has length 96 [2023-11-29 06:03:15,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:03:15,405 INFO L495 AbstractCegarLoop]: Abstraction has 425 states and 601 transitions. [2023-11-29 06:03:15,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 19 states have internal predecessors, (52), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) [2023-11-29 06:03:15,405 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 601 transitions. [2023-11-29 06:03:15,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-29 06:03:15,406 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:03:15,406 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:03:15,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-29 06:03:15,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 06:03:15,607 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:03:15,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:03:15,607 INFO L85 PathProgramCache]: Analyzing trace with hash -615201371, now seen corresponding path program 1 times [2023-11-29 06:03:15,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:03:15,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359201449] [2023-11-29 06:03:15,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:03:15,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:03:15,616 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:03:15,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [620589050] [2023-11-29 06:03:15,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:03:15,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:03:15,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:03:15,618 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:03:15,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 06:03:15,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 06:03:15,689 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 06:03:15,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 06:03:15,757 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 06:03:15,757 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 06:03:15,758 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-29 06:03:15,766 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 06:03:15,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 06:03:15,963 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:03:15,966 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-29 06:03:15,996 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-29 06:03:15,998 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post7 could not be translated [2023-11-29 06:03:16,001 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-29 06:03:16,002 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post7 could not be translated [2023-11-29 06:03:16,004 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post7 could not be translated [2023-11-29 06:03:16,007 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-29 06:03:16,022 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 06:03:16 BoogieIcfgContainer [2023-11-29 06:03:16,022 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-29 06:03:16,023 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-29 06:03:16,023 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-29 06:03:16,023 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-29 06:03:16,023 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:01:45" (3/4) ... [2023-11-29 06:03:16,024 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-11-29 06:03:16,035 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-29 06:03:16,035 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post7 could not be translated [2023-11-29 06:03:16,037 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-29 06:03:16,038 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post7 could not be translated [2023-11-29 06:03:16,040 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post7 could not be translated [2023-11-29 06:03:16,041 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-29 06:03:16,087 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/witness.graphml [2023-11-29 06:03:16,087 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-29 06:03:16,088 INFO L158 Benchmark]: Toolchain (without parser) took 91236.79ms. Allocated memory was 167.8MB in the beginning and 234.9MB in the end (delta: 67.1MB). Free memory was 121.5MB in the beginning and 114.7MB in the end (delta: 6.8MB). Peak memory consumption was 77.0MB. Max. memory is 16.1GB. [2023-11-29 06:03:16,089 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 167.8MB. Free memory is still 113.1MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 06:03:16,089 INFO L158 Benchmark]: CACSL2BoogieTranslator took 217.47ms. Allocated memory is still 167.8MB. Free memory was 121.5MB in the beginning and 110.3MB in the end (delta: 11.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-29 06:03:16,089 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.16ms. Allocated memory is still 167.8MB. Free memory was 110.3MB in the beginning and 108.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-29 06:03:16,090 INFO L158 Benchmark]: Boogie Preprocessor took 29.16ms. Allocated memory is still 167.8MB. Free memory was 108.2MB in the beginning and 106.8MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 06:03:16,090 INFO L158 Benchmark]: RCFGBuilder took 300.54ms. Allocated memory is still 167.8MB. Free memory was 106.8MB in the beginning and 93.5MB in the end (delta: 13.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-11-29 06:03:16,091 INFO L158 Benchmark]: TraceAbstraction took 90588.22ms. Allocated memory was 167.8MB in the beginning and 234.9MB in the end (delta: 67.1MB). Free memory was 92.8MB in the beginning and 118.9MB in the end (delta: -26.1MB). Peak memory consumption was 43.5MB. Max. memory is 16.1GB. [2023-11-29 06:03:16,091 INFO L158 Benchmark]: Witness Printer took 64.86ms. Allocated memory is still 234.9MB. Free memory was 118.9MB in the beginning and 114.7MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-29 06:03:16,093 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 167.8MB. Free memory is still 113.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 217.47ms. Allocated memory is still 167.8MB. Free memory was 121.5MB in the beginning and 110.3MB in the end (delta: 11.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 30.16ms. Allocated memory is still 167.8MB. Free memory was 110.3MB in the beginning and 108.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 29.16ms. Allocated memory is still 167.8MB. Free memory was 108.2MB in the beginning and 106.8MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 300.54ms. Allocated memory is still 167.8MB. Free memory was 106.8MB in the beginning and 93.5MB in the end (delta: 13.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 90588.22ms. Allocated memory was 167.8MB in the beginning and 234.9MB in the end (delta: 67.1MB). Free memory was 92.8MB in the beginning and 118.9MB in the end (delta: -26.1MB). Peak memory consumption was 43.5MB. Max. memory is 16.1GB. * Witness Printer took 64.86ms. Allocated memory is still 234.9MB. Free memory was 118.9MB in the beginning and 114.7MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post7 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post7 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post7 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post7 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post7 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post7 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * 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 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; [L20] int x, y; [L21] long long a, b, p, q, r, s, c, k, xy, yy; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L24] RET assume_abort_if_not(x >= 1) VAL [counter=0, x=2, y=3] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L25] RET assume_abort_if_not(y >= 1) VAL [counter=0, x=2, y=3] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 [L33] c = 0 [L34] k = 0 [L35] xy = (long long) x * y [L36] yy = (long long) y * y VAL [a=2, b=3, c=0, counter=0, k=0, p=1, q=0, r=0, s=1, x=2, xy=6, y=3, yy=9] [L37] CALL assume_abort_if_not(xy < 2147483647) VAL [\old(cond)=1, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L37] RET assume_abort_if_not(xy < 2147483647) VAL [a=2, b=3, c=0, counter=0, k=0, p=1, q=0, r=0, s=1, x=2, xy=6, y=3, yy=9] [L38] CALL assume_abort_if_not(yy < 2147483647) VAL [\old(cond)=1, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L38] RET assume_abort_if_not(yy < 2147483647) VAL [a=2, b=3, c=0, counter=0, k=0, p=1, q=0, r=0, s=1, x=2, xy=6, y=3, yy=9] [L40] EXPR counter++ VAL [a=2, b=3, c=0, counter=1, k=0, p=1, q=0, r=0, s=1, x=2, xy=6, y=3, yy=9] [L40] COND TRUE counter++<5 [L41] COND FALSE, EXPR !(!(b != 0)) [L43] EXPR c = a [L44] EXPR k = 0 VAL [a=2, b=3, c=2, counter=1, k=0, p=1, q=0, r=0, s=1, x=2, xy=6, y=3, yy=9] [L46] EXPR counter++ VAL [a=2, b=3, c=2, counter=2, k=0, p=1, q=0, r=0, s=1, x=2, xy=6, y=3, yy=9] [L46] COND TRUE, EXPR counter++<5 [L47] CALL, EXPR __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L47] RET, EXPR __VERIFIER_assert(a == k * b + c) VAL [a=2, b=3, c=2, counter=2, k=0, p=1, q=0, r=0, s=1, x=2, xy=6, y=3, yy=9] [L48] CALL, EXPR __VERIFIER_assert(a == y*r + x*p) VAL [\old(cond)=1, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L48] RET, EXPR __VERIFIER_assert(a == y*r + x*p) VAL [a=2, b=3, c=2, counter=2, k=0, p=1, q=0, r=0, s=1, x=2, xy=6, y=3, yy=9] [L49] CALL, EXPR __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L49] RET, EXPR __VERIFIER_assert(b == x * q + y * s) VAL [a=2, b=3, c=2, counter=2, k=0, p=1, q=0, r=0, s=1, x=2, xy=6, y=3, yy=9] [L50] CALL, EXPR __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [\old(cond)=1, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L50] RET, EXPR __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [a=2, b=3, c=2, counter=2, k=0, p=1, q=0, r=0, s=1, x=2, xy=6, y=3, yy=9] [L51] COND TRUE, EXPR !(c >= b) VAL [a=2, b=3, c=2, counter=2, k=0, p=1, q=0, r=0, s=1, x=2, xy=6, y=3, yy=9] [L57] EXPR a = b [L58] EXPR b = c [L60] long long temp; [L61] EXPR temp = p [L62] EXPR p = q [L63] EXPR q = temp - q * k [L64] EXPR temp = r [L65] EXPR r = s [L66] EXPR s = temp - s * k [L40-L67] { if (!(b != 0)) break; c = a; k = 0; while (counter++<5) { __VERIFIER_assert(a == k * b + c); __VERIFIER_assert(a == y*r + x*p); __VERIFIER_assert(b == x * q + y * s); __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0); if (!(c >= b)) break; c = c - b; k = k + 1; } a = b; b = c; long long temp; temp = p; p = q; q = temp - q * k; temp = r; r = s; s = temp - s * k; } VAL [a=3, b=2, c=2, counter=2, k=0, p=0, q=1, r=1, s=0, x=2, xy=6, y=3, yy=9] [L40] EXPR counter++ VAL [a=3, b=2, c=2, counter=3, k=0, p=0, q=1, r=1, s=0, x=2, xy=6, y=3, yy=9] [L40] COND TRUE counter++<5 [L41] COND FALSE, EXPR !(!(b != 0)) [L43] EXPR c = a [L44] EXPR k = 0 VAL [a=3, b=2, c=3, counter=3, k=0, p=0, q=1, r=1, s=0, x=2, xy=6, y=3, yy=9] [L46] EXPR counter++ VAL [a=3, b=2, c=3, counter=4, k=0, p=0, q=1, r=1, s=0, x=2, xy=6, y=3, yy=9] [L46] COND TRUE, EXPR counter++<5 [L47] CALL, EXPR __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L47] RET, EXPR __VERIFIER_assert(a == k * b + c) VAL [a=3, b=2, c=3, counter=4, k=0, p=0, q=1, r=1, s=0, x=2, xy=6, y=3, yy=9] [L48] CALL, EXPR __VERIFIER_assert(a == y*r + x*p) VAL [\old(cond)=1, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L48] RET, EXPR __VERIFIER_assert(a == y*r + x*p) VAL [a=3, b=2, c=3, counter=4, k=0, p=0, q=1, r=1, s=0, x=2, xy=6, y=3, yy=9] [L49] CALL, EXPR __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L49] RET, EXPR __VERIFIER_assert(b == x * q + y * s) VAL [a=3, b=2, c=3, counter=4, k=0, p=0, q=1, r=1, s=0, x=2, xy=6, y=3, yy=9] [L50] CALL, EXPR __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [\old(cond)=1, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L50] RET, EXPR __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [a=3, b=2, c=3, counter=4, k=0, p=0, q=1, r=1, s=0, x=2, xy=6, y=3, yy=9] [L51] COND FALSE, EXPR !(!(c >= b)) [L53] EXPR c = c - b [L54] EXPR k = k + 1 VAL [a=3, b=2, c=1, counter=4, k=1, p=0, q=1, r=1, s=0, x=2, xy=6, y=3, yy=9] [L46] EXPR counter++ VAL [a=3, b=2, c=1, counter=5, k=1, p=0, q=1, r=1, s=0, x=2, xy=6, y=3, yy=9] [L46] COND TRUE, EXPR counter++<5 [L47] CALL, EXPR __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L47] RET, EXPR __VERIFIER_assert(a == k * b + c) VAL [a=3, b=2, c=1, counter=5, k=1, p=0, q=1, r=1, s=0, x=2, xy=6, y=3, yy=9] [L48] CALL, EXPR __VERIFIER_assert(a == y*r + x*p) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L48] RET, EXPR __VERIFIER_assert(a == y*r + x*p) VAL [a=3, b=2, c=1, counter=5, k=1, p=0, q=1, r=1, s=0, x=2, xy=6, y=3, yy=9] [L49] CALL, EXPR __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L49] RET, EXPR __VERIFIER_assert(b == x * q + y * s) VAL [a=3, b=2, c=1, counter=5, k=1, p=0, q=1, r=1, s=0, x=2, xy=6, y=3, yy=9] [L50] CALL, EXPR __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L50] RET, EXPR __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [a=3, b=2, c=1, counter=5, k=1, p=0, q=1, r=1, s=0, x=2, xy=6, y=3, yy=9] [L51] COND TRUE, EXPR !(c >= b) VAL [a=3, b=2, c=1, counter=5, k=1, p=0, q=1, r=1, s=0, x=2, xy=6, y=3, yy=9] [L57] EXPR a = b [L58] EXPR b = c [L60] long long temp; [L61] EXPR temp = p [L62] EXPR p = q [L63] EXPR q = temp - q * k [L64] EXPR temp = r [L65] EXPR r = s [L66] EXPR s = temp - s * k [L40-L67] { if (!(b != 0)) break; c = a; k = 0; while (counter++<5) { __VERIFIER_assert(a == k * b + c); __VERIFIER_assert(a == y*r + x*p); __VERIFIER_assert(b == x * q + y * s); __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0); if (!(c >= b)) break; c = c - b; k = k + 1; } a = b; b = c; long long temp; temp = p; p = q; q = temp - q * k; temp = r; r = s; s = temp - s * k; } VAL [a=2, b=1, c=1, counter=5, k=1, p=1, q=-1, r=0, s=1, x=2, xy=6, y=3, yy=9] [L40] EXPR counter++ VAL [a=2, b=1, c=1, counter=6, k=1, p=1, q=-1, r=0, s=1, x=2, xy=6, y=3, yy=9] [L40] COND FALSE !(counter++<5) [L70] CALL __VERIFIER_assert(q*x + s*y == 0) VAL [\old(cond)=0, counter=6] [L11] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=6] [L13] reach_error() VAL [\old(cond)=0, cond=0, counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 90.5s, OverallIterations: 18, TraceHistogramMax: 13, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 71.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 775 SdHoareTripleChecker+Valid, 19.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 708 mSDsluCounter, 3440 SdHoareTripleChecker+Invalid, 18.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2791 mSDsCounter, 387 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2171 IncrementalHoareTripleChecker+Invalid, 2560 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 387 mSolverCounterUnsat, 649 mSDtfsCounter, 2171 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1562 GetRequests, 1317 SyntacticMatches, 8 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1032 ImplicationChecksByTransitivity, 58.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=425occurred in iteration=17, InterpolantAutomatonStates: 178, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 17 MinimizatonAttempts, 178 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 13.3s InterpolantComputationTime, 1040 NumberOfCodeBlocks, 1020 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 1425 ConstructedInterpolants, 0 QuantifiedInterpolants, 8029 SizeOfPredicates, 79 NumberOfNonLiveVariables, 2627 ConjunctsInSsa, 330 ConjunctsInUnsatCore, 27 InterpolantComputations, 7 PerfectInterpolantSequences, 1954/2162 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 RESULT: Ultimate proved your program to be incorrect! [2023-11-29 06:03:16,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1bf9e0-e401-47a7-97c8-7b2af7d7d586/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE