./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i --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_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/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_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/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_0d004b92-7291-4cdb-8f18-506326b94169/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 68585835b92043bfb2f3c62590e96ff685993869f8a251aecd9fe4c8aaea0e1e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 05:10:21,526 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 05:10:21,599 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 05:10:21,604 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 05:10:21,605 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 05:10:21,632 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 05:10:21,632 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 05:10:21,633 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 05:10:21,634 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 05:10:21,634 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 05:10:21,635 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 05:10:21,635 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 05:10:21,636 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 05:10:21,637 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 05:10:21,637 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 05:10:21,638 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 05:10:21,639 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 05:10:21,639 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 05:10:21,640 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 05:10:21,640 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 05:10:21,641 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 05:10:21,641 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 05:10:21,642 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 05:10:21,642 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 05:10:21,643 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 05:10:21,643 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 05:10:21,644 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 05:10:21,644 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 05:10:21,645 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 05:10:21,645 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 05:10:21,645 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 05:10:21,646 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:10:21,646 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 05:10:21,647 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 05:10:21,647 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 05:10:21,648 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 05:10:21,648 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 05:10:21,649 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 05:10:21,649 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 05:10:21,650 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 05:10:21,650 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 05:10:21,651 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 05:10:21,651 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_0d004b92-7291-4cdb-8f18-506326b94169/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68585835b92043bfb2f3c62590e96ff685993869f8a251aecd9fe4c8aaea0e1e [2023-11-29 05:10:21,922 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 05:10:21,945 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 05:10:21,948 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 05:10:21,949 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 05:10:21,950 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 05:10:21,951 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i [2023-11-29 05:10:24,826 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 05:10:25,035 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 05:10:25,035 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i [2023-11-29 05:10:25,044 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/data/1ea3c1772/a01e9f8f22324cafbc9fa4fea3c496dd/FLAGb27c22626 [2023-11-29 05:10:25,059 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/data/1ea3c1772/a01e9f8f22324cafbc9fa4fea3c496dd [2023-11-29 05:10:25,062 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 05:10:25,065 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 05:10:25,067 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 05:10:25,067 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 05:10:25,073 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 05:10:25,074 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:10:25" (1/1) ... [2023-11-29 05:10:25,075 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70b48e68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:10:25, skipping insertion in model container [2023-11-29 05:10:25,075 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:10:25" (1/1) ... [2023-11-29 05:10:25,096 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 05:10:25,317 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_0d004b92-7291-4cdb-8f18-506326b94169/sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i[820,833] [2023-11-29 05:10:25,339 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:10:25,350 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 05:10:25,366 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_0d004b92-7291-4cdb-8f18-506326b94169/sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i[820,833] [2023-11-29 05:10:25,377 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:10:25,395 INFO L206 MainTranslator]: Completed translation [2023-11-29 05:10:25,395 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:10:25 WrapperNode [2023-11-29 05:10:25,395 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 05:10:25,397 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 05:10:25,397 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 05:10:25,397 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 05:10:25,406 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:10:25" (1/1) ... [2023-11-29 05:10:25,414 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:10:25" (1/1) ... [2023-11-29 05:10:25,437 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2023-11-29 05:10:25,437 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 05:10:25,438 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 05:10:25,438 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 05:10:25,439 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 05:10:25,451 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:10:25" (1/1) ... [2023-11-29 05:10:25,452 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:10:25" (1/1) ... [2023-11-29 05:10:25,454 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:10:25" (1/1) ... [2023-11-29 05:10:25,468 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2023-11-29 05:10:25,468 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:10:25" (1/1) ... [2023-11-29 05:10:25,468 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:10:25" (1/1) ... [2023-11-29 05:10:25,474 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:10:25" (1/1) ... [2023-11-29 05:10:25,479 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:10:25" (1/1) ... [2023-11-29 05:10:25,480 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:10:25" (1/1) ... [2023-11-29 05:10:25,482 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:10:25" (1/1) ... [2023-11-29 05:10:25,485 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 05:10:25,486 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 05:10:25,486 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 05:10:25,486 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 05:10:25,487 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:10:25" (1/1) ... [2023-11-29 05:10:25,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:10:25,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:10:25,518 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 05:10:25,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 05:10:25,558 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 05:10:25,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 05:10:25,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 05:10:25,559 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 05:10:25,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 05:10:25,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 05:10:25,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 05:10:25,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 05:10:25,560 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 05:10:25,560 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 05:10:25,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 05:10:25,648 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 05:10:25,651 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 05:10:25,801 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 05:10:25,831 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 05:10:25,831 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-29 05:10:25,832 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:10:25 BoogieIcfgContainer [2023-11-29 05:10:25,832 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 05:10:25,836 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 05:10:25,836 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 05:10:25,840 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 05:10:25,840 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 05:10:25" (1/3) ... [2023-11-29 05:10:25,841 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6df06567 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:10:25, skipping insertion in model container [2023-11-29 05:10:25,841 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:10:25" (2/3) ... [2023-11-29 05:10:25,842 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6df06567 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:10:25, skipping insertion in model container [2023-11-29 05:10:25,842 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:10:25" (3/3) ... [2023-11-29 05:10:25,844 INFO L112 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_ground-1.i [2023-11-29 05:10:25,865 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 05:10:25,866 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 05:10:25,912 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 05:10:25,919 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;@4b0b536e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 05:10:25,920 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 05:10:25,924 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:25,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-29 05:10:25,930 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:10:25,931 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:10:25,931 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:10:25,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:10:25,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1612111142, now seen corresponding path program 1 times [2023-11-29 05:10:25,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:10:25,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337052190] [2023-11-29 05:10:25,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:10:25,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:10:26,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:10:26,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:10:26,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:10:26,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337052190] [2023-11-29 05:10:26,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337052190] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:10:26,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:10:26,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:10:26,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375399162] [2023-11-29 05:10:26,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:10:26,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:10:26,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:10:26,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:10:26,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:10:26,205 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:26,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:10:26,247 INFO L93 Difference]: Finished difference Result 35 states and 57 transitions. [2023-11-29 05:10:26,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:10:26,250 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-29 05:10:26,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:10:26,259 INFO L225 Difference]: With dead ends: 35 [2023-11-29 05:10:26,259 INFO L226 Difference]: Without dead ends: 17 [2023-11-29 05:10:26,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:10:26,266 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:10:26,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:10:26,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-29 05:10:26,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-29 05:10:26,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:26,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2023-11-29 05:10:26,307 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 9 [2023-11-29 05:10:26,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:10:26,307 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2023-11-29 05:10:26,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:26,308 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2023-11-29 05:10:26,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-29 05:10:26,309 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:10:26,309 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:10:26,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 05:10:26,310 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:10:26,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:10:26,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1371244853, now seen corresponding path program 1 times [2023-11-29 05:10:26,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:10:26,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329834091] [2023-11-29 05:10:26,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:10:26,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:10:26,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:10:26,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:10:26,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:10:26,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329834091] [2023-11-29 05:10:26,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329834091] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:10:26,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582667129] [2023-11-29 05:10:26,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:10:26,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:10:26,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:10:26,408 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:10:26,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 05:10:26,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:10:26,491 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 05:10:26,496 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:10:26,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:10:26,516 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:10:26,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582667129] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:10:26,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:10:26,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-29 05:10:26,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065792241] [2023-11-29 05:10:26,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:10:26,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:10:26,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:10:26,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:10:26,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:10:26,521 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:26,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:10:26,541 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2023-11-29 05:10:26,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:10:26,542 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-29 05:10:26,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:10:26,543 INFO L225 Difference]: With dead ends: 30 [2023-11-29 05:10:26,543 INFO L226 Difference]: Without dead ends: 22 [2023-11-29 05:10:26,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 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 05:10:26,546 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 5 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:10:26,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 36 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:10:26,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-29 05:10:26,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-11-29 05:10:26,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:26,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2023-11-29 05:10:26,553 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 10 [2023-11-29 05:10:26,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:10:26,554 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2023-11-29 05:10:26,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:26,555 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2023-11-29 05:10:26,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-29 05:10:26,556 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:10:26,556 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:10:26,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 05:10:26,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:10:26,757 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:10:26,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:10:26,758 INFO L85 PathProgramCache]: Analyzing trace with hash 810154115, now seen corresponding path program 1 times [2023-11-29 05:10:26,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:10:26,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353619497] [2023-11-29 05:10:26,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:10:26,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:10:26,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:10:26,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:10:26,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:10:26,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353619497] [2023-11-29 05:10:26,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353619497] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:10:26,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447886711] [2023-11-29 05:10:26,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:10:26,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:10:26,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:10:26,847 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:10:26,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 05:10:26,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:10:26,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 05:10:26,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:10:26,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:10:26,937 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:10:26,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447886711] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:10:26,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:10:26,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-29 05:10:26,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610088873] [2023-11-29 05:10:26,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:10:26,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:10:26,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:10:26,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:10:26,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:10:26,940 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:26,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:10:26,969 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2023-11-29 05:10:26,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:10:26,969 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-29 05:10:26,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:10:26,970 INFO L225 Difference]: With dead ends: 44 [2023-11-29 05:10:26,971 INFO L226 Difference]: Without dead ends: 26 [2023-11-29 05:10:26,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 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 05:10:26,973 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:10:26,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 27 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:10:26,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-29 05:10:26,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2023-11-29 05:10:26,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:26,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2023-11-29 05:10:26,980 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 13 [2023-11-29 05:10:26,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:10:26,981 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2023-11-29 05:10:26,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:26,981 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2023-11-29 05:10:26,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-29 05:10:26,982 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:10:26,982 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:10:26,989 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 05:10:27,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:10:27,185 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:10:27,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:10:27,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1552667997, now seen corresponding path program 1 times [2023-11-29 05:10:27,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:10:27,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129759963] [2023-11-29 05:10:27,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:10:27,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:10:27,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:10:27,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:10:27,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:10:27,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129759963] [2023-11-29 05:10:27,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129759963] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:10:27,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672171062] [2023-11-29 05:10:27,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:10:27,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:10:27,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:10:27,273 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:10:27,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 05:10:27,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:10:27,345 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 05:10:27,346 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:10:27,396 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:10:27,396 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:10:27,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:10:27,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672171062] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:10:27,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:10:27,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-29 05:10:27,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980852611] [2023-11-29 05:10:27,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:10:27,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 05:10:27,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:10:27,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 05:10:27,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:10:27,422 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:27,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:10:27,450 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2023-11-29 05:10:27,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:10:27,451 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-29 05:10:27,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:10:27,451 INFO L225 Difference]: With dead ends: 46 [2023-11-29 05:10:27,452 INFO L226 Difference]: Without dead ends: 26 [2023-11-29 05:10:27,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:10:27,453 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:10:27,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:10:27,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-29 05:10:27,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-11-29 05:10:27,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:27,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2023-11-29 05:10:27,460 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 16 [2023-11-29 05:10:27,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:10:27,460 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2023-11-29 05:10:27,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:27,460 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2023-11-29 05:10:27,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-29 05:10:27,461 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:10:27,461 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:10:27,467 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 05:10:27,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:10:27,665 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:10:27,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:10:27,666 INFO L85 PathProgramCache]: Analyzing trace with hash -190909954, now seen corresponding path program 2 times [2023-11-29 05:10:27,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:10:27,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427354312] [2023-11-29 05:10:27,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:10:27,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:10:27,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:10:27,741 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 05:10:27,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:10:27,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427354312] [2023-11-29 05:10:27,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427354312] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:10:27,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172674358] [2023-11-29 05:10:27,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:10:27,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:10:27,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:10:27,744 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:10:27,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 05:10:27,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:10:27,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:10:27,825 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 05:10:27,826 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:10:27,873 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:10:27,873 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:10:27,949 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:10:27,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172674358] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:10:27,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:10:27,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-11-29 05:10:27,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790092296] [2023-11-29 05:10:27,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:10:27,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 05:10:27,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:10:27,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 05:10:27,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-29 05:10:27,952 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:28,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:10:28,013 INFO L93 Difference]: Finished difference Result 61 states and 85 transitions. [2023-11-29 05:10:28,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 05:10:28,014 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-29 05:10:28,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:10:28,015 INFO L225 Difference]: With dead ends: 61 [2023-11-29 05:10:28,015 INFO L226 Difference]: Without dead ends: 41 [2023-11-29 05:10:28,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-29 05:10:28,016 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 5 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:10:28,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 80 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:10:28,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-29 05:10:28,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2023-11-29 05:10:28,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.25) internal successors, (45), 36 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:28,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2023-11-29 05:10:28,024 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 19 [2023-11-29 05:10:28,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:10:28,025 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2023-11-29 05:10:28,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:28,025 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2023-11-29 05:10:28,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-29 05:10:28,026 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:10:28,026 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:10:28,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 05:10:28,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:10:28,229 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:10:28,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:10:28,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1522098536, now seen corresponding path program 3 times [2023-11-29 05:10:28,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:10:28,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102766668] [2023-11-29 05:10:28,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:10:28,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:10:28,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:10:28,361 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 05:10:28,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:10:28,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102766668] [2023-11-29 05:10:28,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102766668] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:10:28,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743455863] [2023-11-29 05:10:28,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:10:28,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:10:28,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:10:28,363 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:10:28,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 05:10:28,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 05:10:28,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:10:28,460 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 05:10:28,462 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:10:28,489 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 05:10:28,489 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:10:28,527 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 05:10:28,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743455863] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:10:28,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:10:28,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-11-29 05:10:28,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266110664] [2023-11-29 05:10:28,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:10:28,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 05:10:28,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:10:28,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 05:10:28,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:10:28,530 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:28,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:10:28,584 INFO L93 Difference]: Finished difference Result 85 states and 116 transitions. [2023-11-29 05:10:28,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:10:28,585 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-11-29 05:10:28,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:10:28,586 INFO L225 Difference]: With dead ends: 85 [2023-11-29 05:10:28,586 INFO L226 Difference]: Without dead ends: 61 [2023-11-29 05:10:28,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:10:28,587 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 20 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:10:28,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 42 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:10:28,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-29 05:10:28,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-11-29 05:10:28,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.2833333333333334) internal successors, (77), 60 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:28,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 77 transitions. [2023-11-29 05:10:28,597 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 77 transitions. Word has length 28 [2023-11-29 05:10:28,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:10:28,597 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 77 transitions. [2023-11-29 05:10:28,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:28,598 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 77 transitions. [2023-11-29 05:10:28,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-29 05:10:28,599 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:10:28,599 INFO L195 NwaCegarLoop]: trace histogram [10, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:10:28,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 05:10:28,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 05:10:28,800 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:10:28,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:10:28,800 INFO L85 PathProgramCache]: Analyzing trace with hash -302265880, now seen corresponding path program 4 times [2023-11-29 05:10:28,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:10:28,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204972470] [2023-11-29 05:10:28,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:10:28,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:10:28,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:10:29,110 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-29 05:10:29,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:10:29,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204972470] [2023-11-29 05:10:29,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204972470] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:10:29,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551725542] [2023-11-29 05:10:29,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:10:29,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:10:29,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:10:29,113 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:10:29,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 05:10:29,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:10:29,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:10:29,237 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 05:10:29,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:10:29,373 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 05:10:29,373 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:10:29,548 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 05:10:29,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551725542] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:10:29,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:10:29,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 27 [2023-11-29 05:10:29,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203215245] [2023-11-29 05:10:29,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:10:29,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 05:10:29,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:10:29,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 05:10:29,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=505, Unknown=0, NotChecked=0, Total=702 [2023-11-29 05:10:29,552 INFO L87 Difference]: Start difference. First operand 61 states and 77 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:29,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:10:29,684 INFO L93 Difference]: Finished difference Result 159 states and 223 transitions. [2023-11-29 05:10:29,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-29 05:10:29,684 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-11-29 05:10:29,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:10:29,686 INFO L225 Difference]: With dead ends: 159 [2023-11-29 05:10:29,686 INFO L226 Difference]: Without dead ends: 110 [2023-11-29 05:10:29,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=197, Invalid=505, Unknown=0, NotChecked=0, Total=702 [2023-11-29 05:10:29,688 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 40 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:10:29,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 89 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:10:29,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-11-29 05:10:29,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2023-11-29 05:10:29,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.3027522935779816) internal successors, (142), 109 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:29,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 142 transitions. [2023-11-29 05:10:29,704 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 142 transitions. Word has length 40 [2023-11-29 05:10:29,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:10:29,704 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 142 transitions. [2023-11-29 05:10:29,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:29,705 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 142 transitions. [2023-11-29 05:10:29,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-29 05:10:29,708 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:10:29,708 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:10:29,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 05:10:29,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 05:10:29,913 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:10:29,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:10:29,914 INFO L85 PathProgramCache]: Analyzing trace with hash 299109283, now seen corresponding path program 5 times [2023-11-29 05:10:29,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:10:29,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21494503] [2023-11-29 05:10:29,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:10:29,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:10:29,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:10:30,303 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2023-11-29 05:10:30,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:10:30,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21494503] [2023-11-29 05:10:30,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21494503] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:10:30,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114803674] [2023-11-29 05:10:30,304 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:10:30,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:10:30,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:10:30,305 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:10:30,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 05:10:30,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2023-11-29 05:10:30,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:10:30,531 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 05:10:30,535 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:10:30,836 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-29 05:10:30,836 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:10:31,414 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-29 05:10:31,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114803674] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:10:31,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:10:31,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 44 [2023-11-29 05:10:31,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568277198] [2023-11-29 05:10:31,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:10:31,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-29 05:10:31,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:10:31,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-29 05:10:31,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=586, Invalid=1306, Unknown=0, NotChecked=0, Total=1892 [2023-11-29 05:10:31,419 INFO L87 Difference]: Start difference. First operand 110 states and 142 transitions. Second operand has 44 states, 44 states have (on average 2.6818181818181817) internal successors, (118), 44 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:31,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:10:31,712 INFO L93 Difference]: Finished difference Result 304 states and 432 transitions. [2023-11-29 05:10:31,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-29 05:10:31,713 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.6818181818181817) internal successors, (118), 44 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2023-11-29 05:10:31,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:10:31,715 INFO L225 Difference]: With dead ends: 304 [2023-11-29 05:10:31,716 INFO L226 Difference]: Without dead ends: 207 [2023-11-29 05:10:31,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=586, Invalid=1306, Unknown=0, NotChecked=0, Total=1892 [2023-11-29 05:10:31,719 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 89 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:10:31,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 166 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:10:31,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2023-11-29 05:10:31,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2023-11-29 05:10:31,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.3155339805825244) internal successors, (271), 206 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:31,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 271 transitions. [2023-11-29 05:10:31,741 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 271 transitions. Word has length 65 [2023-11-29 05:10:31,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:10:31,742 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 271 transitions. [2023-11-29 05:10:31,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.6818181818181817) internal successors, (118), 44 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:31,742 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 271 transitions. [2023-11-29 05:10:31,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-11-29 05:10:31,746 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:10:31,746 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:10:31,753 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 05:10:31,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:10:31,953 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:10:31,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:10:31,953 INFO L85 PathProgramCache]: Analyzing trace with hash -683125688, now seen corresponding path program 6 times [2023-11-29 05:10:31,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:10:31,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407495511] [2023-11-29 05:10:31,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:10:31,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:10:32,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:10:32,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1414 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2023-11-29 05:10:32,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:10:32,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407495511] [2023-11-29 05:10:32,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407495511] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:10:32,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047945647] [2023-11-29 05:10:32,430 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:10:32,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:10:32,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:10:32,431 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:10:32,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 05:10:32,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-11-29 05:10:32,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:10:32,594 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 05:10:32,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:10:33,345 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:10:33,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2023-11-29 05:10:33,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1414 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 1354 trivial. 0 not checked. [2023-11-29 05:10:33,371 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:10:33,789 INFO L349 Elim1Store]: treesize reduction 13, result has 60.6 percent of original size [2023-11-29 05:10:33,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 28 [2023-11-29 05:10:33,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1414 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 1354 trivial. 0 not checked. [2023-11-29 05:10:33,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047945647] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:10:33,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:10:33,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 8] total 29 [2023-11-29 05:10:33,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562233188] [2023-11-29 05:10:33,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:10:33,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 05:10:33,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:10:33,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 05:10:33,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2023-11-29 05:10:33,859 INFO L87 Difference]: Start difference. First operand 207 states and 271 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:34,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:10:34,502 INFO L93 Difference]: Finished difference Result 413 states and 545 transitions. [2023-11-29 05:10:34,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 05:10:34,503 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2023-11-29 05:10:34,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:10:34,504 INFO L225 Difference]: With dead ends: 413 [2023-11-29 05:10:34,504 INFO L226 Difference]: Without dead ends: 220 [2023-11-29 05:10:34,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=426, Invalid=1926, Unknown=0, NotChecked=0, Total=2352 [2023-11-29 05:10:34,508 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 68 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:10:34,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 173 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:10:34,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2023-11-29 05:10:34,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 211. [2023-11-29 05:10:34,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 1.3095238095238095) internal successors, (275), 210 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:34,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 275 transitions. [2023-11-29 05:10:34,530 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 275 transitions. Word has length 114 [2023-11-29 05:10:34,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:10:34,531 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 275 transitions. [2023-11-29 05:10:34,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:34,531 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 275 transitions. [2023-11-29 05:10:34,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-11-29 05:10:34,534 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:10:34,534 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:10:34,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-29 05:10:34,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:10:34,741 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:10:34,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:10:34,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1663067282, now seen corresponding path program 1 times [2023-11-29 05:10:34,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:10:34,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670132649] [2023-11-29 05:10:34,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:10:34,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:10:34,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:10:35,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1429 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 1338 trivial. 0 not checked. [2023-11-29 05:10:35,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:10:35,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670132649] [2023-11-29 05:10:35,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670132649] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:10:35,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241622376] [2023-11-29 05:10:35,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:10:35,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:10:35,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:10:35,224 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:10:35,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 05:10:35,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:10:35,399 INFO L262 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 05:10:35,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:10:35,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1429 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 1338 trivial. 0 not checked. [2023-11-29 05:10:35,443 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:10:35,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1429 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 1338 trivial. 0 not checked. [2023-11-29 05:10:35,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241622376] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:10:35,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:10:35,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 30 [2023-11-29 05:10:35,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748368695] [2023-11-29 05:10:35,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:10:35,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-29 05:10:35,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:10:35,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-29 05:10:35,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2023-11-29 05:10:35,808 INFO L87 Difference]: Start difference. First operand 211 states and 275 transitions. Second operand has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 30 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:35,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:10:35,866 INFO L93 Difference]: Finished difference Result 422 states and 564 transitions. [2023-11-29 05:10:35,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-29 05:10:35,867 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 30 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2023-11-29 05:10:35,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:10:35,869 INFO L225 Difference]: With dead ends: 422 [2023-11-29 05:10:35,869 INFO L226 Difference]: Without dead ends: 226 [2023-11-29 05:10:35,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2023-11-29 05:10:35,871 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:10:35,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 82 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:10:35,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2023-11-29 05:10:35,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2023-11-29 05:10:35,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.288888888888889) internal successors, (290), 225 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:35,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 290 transitions. [2023-11-29 05:10:35,891 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 290 transitions. Word has length 118 [2023-11-29 05:10:35,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:10:35,891 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 290 transitions. [2023-11-29 05:10:35,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 30 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:35,892 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 290 transitions. [2023-11-29 05:10:35,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-11-29 05:10:35,894 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:10:35,894 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 28, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:10:35,901 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 05:10:36,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 05:10:36,101 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:10:36,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:10:36,102 INFO L85 PathProgramCache]: Analyzing trace with hash 2096992841, now seen corresponding path program 2 times [2023-11-29 05:10:36,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:10:36,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905384706] [2023-11-29 05:10:36,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:10:36,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:10:36,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:10:37,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1744 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 1338 trivial. 0 not checked. [2023-11-29 05:10:37,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:10:37,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905384706] [2023-11-29 05:10:37,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905384706] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:10:37,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156155084] [2023-11-29 05:10:37,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:10:37,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:10:37,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:10:37,042 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:10:37,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 05:10:37,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:10:37,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:10:37,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 05:10:37,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:10:37,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1744 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 1338 trivial. 0 not checked. [2023-11-29 05:10:37,317 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:10:38,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1744 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 1338 trivial. 0 not checked. [2023-11-29 05:10:38,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156155084] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:10:38,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:10:38,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 60 [2023-11-29 05:10:38,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563480416] [2023-11-29 05:10:38,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:10:38,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-11-29 05:10:38,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:10:38,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-11-29 05:10:38,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2023-11-29 05:10:38,288 INFO L87 Difference]: Start difference. First operand 226 states and 290 transitions. Second operand has 61 states, 61 states have (on average 1.2622950819672132) internal successors, (77), 60 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:38,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:10:38,382 INFO L93 Difference]: Finished difference Result 452 states and 609 transitions. [2023-11-29 05:10:38,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-11-29 05:10:38,382 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.2622950819672132) internal successors, (77), 60 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2023-11-29 05:10:38,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:10:38,384 INFO L225 Difference]: With dead ends: 452 [2023-11-29 05:10:38,384 INFO L226 Difference]: Without dead ends: 256 [2023-11-29 05:10:38,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2023-11-29 05:10:38,387 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:10:38,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 114 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:10:38,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2023-11-29 05:10:38,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2023-11-29 05:10:38,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.2549019607843137) internal successors, (320), 255 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:38,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 320 transitions. [2023-11-29 05:10:38,406 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 320 transitions. Word has length 133 [2023-11-29 05:10:38,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:10:38,406 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 320 transitions. [2023-11-29 05:10:38,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.2622950819672132) internal successors, (77), 60 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:38,407 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 320 transitions. [2023-11-29 05:10:38,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-11-29 05:10:38,409 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:10:38,409 INFO L195 NwaCegarLoop]: trace histogram [58, 30, 30, 30, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:10:38,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 05:10:38,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 05:10:38,612 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:10:38,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:10:38,612 INFO L85 PathProgramCache]: Analyzing trace with hash 86798249, now seen corresponding path program 3 times [2023-11-29 05:10:38,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:10:38,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176541274] [2023-11-29 05:10:38,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:10:38,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:10:38,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:10:41,408 INFO L134 CoverageAnalysis]: Checked inductivity of 3049 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 1338 trivial. 0 not checked. [2023-11-29 05:10:41,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:10:41,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176541274] [2023-11-29 05:10:41,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176541274] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:10:41,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964195866] [2023-11-29 05:10:41,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:10:41,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:10:41,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:10:41,410 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:10:41,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 05:10:41,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-29 05:10:41,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:10:41,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 05:10:41,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:10:42,710 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:10:42,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 13 [2023-11-29 05:10:42,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3049 backedges. 1 proven. 147 refuted. 0 times theorem prover too weak. 2901 trivial. 0 not checked. [2023-11-29 05:10:42,754 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:10:43,796 INFO L349 Elim1Store]: treesize reduction 13, result has 73.5 percent of original size [2023-11-29 05:10:43,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 49 treesize of output 47 [2023-11-29 05:10:43,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3049 backedges. 29 proven. 119 refuted. 0 times theorem prover too weak. 2901 trivial. 0 not checked. [2023-11-29 05:10:43,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964195866] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:10:43,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:10:43,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 12, 12] total 82 [2023-11-29 05:10:43,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945603496] [2023-11-29 05:10:43,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:10:43,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2023-11-29 05:10:43,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:10:43,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2023-11-29 05:10:43,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1924, Invalid=4718, Unknown=0, NotChecked=0, Total=6642 [2023-11-29 05:10:43,946 INFO L87 Difference]: Start difference. First operand 256 states and 320 transitions. Second operand has 82 states, 82 states have (on average 1.475609756097561) internal successors, (121), 82 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:46,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:10:46,954 INFO L93 Difference]: Finished difference Result 559 states and 722 transitions. [2023-11-29 05:10:46,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2023-11-29 05:10:46,955 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.475609756097561) internal successors, (121), 82 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2023-11-29 05:10:46,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:10:46,959 INFO L225 Difference]: With dead ends: 559 [2023-11-29 05:10:46,959 INFO L226 Difference]: Without dead ends: 363 [2023-11-29 05:10:46,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4262 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=5717, Invalid=17845, Unknown=0, NotChecked=0, Total=23562 [2023-11-29 05:10:46,968 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 43 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 05:10:46,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 226 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 05:10:46,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2023-11-29 05:10:46,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 260. [2023-11-29 05:10:46,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 1.250965250965251) internal successors, (324), 259 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:46,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 324 transitions. [2023-11-29 05:10:46,984 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 324 transitions. Word has length 163 [2023-11-29 05:10:46,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:10:46,984 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 324 transitions. [2023-11-29 05:10:46,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.475609756097561) internal successors, (121), 82 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:46,984 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 324 transitions. [2023-11-29 05:10:46,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-11-29 05:10:46,986 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:10:46,986 INFO L195 NwaCegarLoop]: trace histogram [59, 30, 30, 30, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:10:46,992 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 05:10:47,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 05:10:47,186 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:10:47,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:10:47,187 INFO L85 PathProgramCache]: Analyzing trace with hash 464838339, now seen corresponding path program 4 times [2023-11-29 05:10:47,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:10:47,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050745231] [2023-11-29 05:10:47,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:10:47,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:10:47,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:10:49,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3113 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 1343 trivial. 0 not checked. [2023-11-29 05:10:49,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:10:49,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050745231] [2023-11-29 05:10:49,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050745231] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:10:49,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395209703] [2023-11-29 05:10:49,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:10:49,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:10:49,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:10:49,888 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:10:49,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 05:10:50,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:10:50,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:10:50,136 INFO L262 TraceCheckSpWp]: Trace formula consists of 855 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 05:10:50,141 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:10:51,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3113 backedges. 1 proven. 1335 refuted. 0 times theorem prover too weak. 1777 trivial. 0 not checked. [2023-11-29 05:10:51,293 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:10:52,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3113 backedges. 1 proven. 1335 refuted. 0 times theorem prover too weak. 1777 trivial. 0 not checked. [2023-11-29 05:10:52,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395209703] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:10:52,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:10:52,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 33, 33] total 124 [2023-11-29 05:10:52,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543849528] [2023-11-29 05:10:52,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:10:52,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2023-11-29 05:10:52,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:10:52,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2023-11-29 05:10:52,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3906, Invalid=11346, Unknown=0, NotChecked=0, Total=15252 [2023-11-29 05:10:52,952 INFO L87 Difference]: Start difference. First operand 260 states and 324 transitions. Second operand has 124 states, 124 states have (on average 2.129032258064516) internal successors, (264), 124 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:53,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:10:53,460 INFO L93 Difference]: Finished difference Result 652 states and 908 transitions. [2023-11-29 05:10:53,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2023-11-29 05:10:53,461 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 2.129032258064516) internal successors, (264), 124 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 167 [2023-11-29 05:10:53,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:10:53,464 INFO L225 Difference]: With dead ends: 652 [2023-11-29 05:10:53,464 INFO L226 Difference]: Without dead ends: 453 [2023-11-29 05:10:53,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3658 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3906, Invalid=11346, Unknown=0, NotChecked=0, Total=15252 [2023-11-29 05:10:53,467 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 262 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:10:53,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 185 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 05:10:53,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2023-11-29 05:10:53,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 453. [2023-11-29 05:10:53,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 1.2853982300884956) internal successors, (581), 452 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:53,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 581 transitions. [2023-11-29 05:10:53,489 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 581 transitions. Word has length 167 [2023-11-29 05:10:53,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:10:53,489 INFO L495 AbstractCegarLoop]: Abstraction has 453 states and 581 transitions. [2023-11-29 05:10:53,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 2.129032258064516) internal successors, (264), 124 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:10:53,489 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 581 transitions. [2023-11-29 05:10:53,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2023-11-29 05:10:53,492 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:10:53,493 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 60, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:10:53,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-29 05:10:53,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 05:10:53,693 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:10:53,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:10:53,694 INFO L85 PathProgramCache]: Analyzing trace with hash 191577512, now seen corresponding path program 5 times [2023-11-29 05:10:53,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:10:53,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270702276] [2023-11-29 05:10:53,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:10:53,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:10:53,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:10:56,797 INFO L134 CoverageAnalysis]: Checked inductivity of 7573 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 5743 trivial. 0 not checked. [2023-11-29 05:10:56,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:10:56,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270702276] [2023-11-29 05:10:56,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270702276] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:10:56,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521269410] [2023-11-29 05:10:56,797 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:10:56,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:10:56,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:10:56,798 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:10:56,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 05:12:05,674 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 63 check-sat command(s) [2023-11-29 05:12:05,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:12:05,713 INFO L262 TraceCheckSpWp]: Trace formula consists of 1069 conjuncts, 64 conjunts are in the unsatisfiable core [2023-11-29 05:12:05,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:12:08,621 INFO L134 CoverageAnalysis]: Checked inductivity of 7573 backedges. 1 proven. 5735 refuted. 0 times theorem prover too weak. 1837 trivial. 0 not checked. [2023-11-29 05:12:08,622 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:12:13,792 INFO L134 CoverageAnalysis]: Checked inductivity of 7573 backedges. 1 proven. 5735 refuted. 0 times theorem prover too weak. 1837 trivial. 0 not checked. [2023-11-29 05:12:13,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521269410] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:12:13,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:12:13,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 65, 65] total 189 [2023-11-29 05:12:13,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454384427] [2023-11-29 05:12:13,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:12:13,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 189 states [2023-11-29 05:12:13,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:12:13,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 189 interpolants. [2023-11-29 05:12:13,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10080, Invalid=25452, Unknown=0, NotChecked=0, Total=35532 [2023-11-29 05:12:13,799 INFO L87 Difference]: Start difference. First operand 453 states and 581 transitions. Second operand has 189 states, 189 states have (on average 2.417989417989418) internal successors, (457), 189 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:12:15,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:12:15,954 INFO L93 Difference]: Finished difference Result 1229 states and 1741 transitions. [2023-11-29 05:12:15,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2023-11-29 05:12:15,955 INFO L78 Accepts]: Start accepts. Automaton has has 189 states, 189 states have (on average 2.417989417989418) internal successors, (457), 189 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 264 [2023-11-29 05:12:15,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:12:15,959 INFO L225 Difference]: With dead ends: 1229 [2023-11-29 05:12:15,959 INFO L226 Difference]: Without dead ends: 838 [2023-11-29 05:12:15,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 588 GetRequests, 401 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7560 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=10080, Invalid=25452, Unknown=0, NotChecked=0, Total=35532 [2023-11-29 05:12:15,962 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 485 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 05:12:15,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [485 Valid, 271 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 05:12:15,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2023-11-29 05:12:16,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 838. [2023-11-29 05:12:16,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 837 states have (on average 1.3070489844683393) internal successors, (1094), 837 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:12:16,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 1094 transitions. [2023-11-29 05:12:16,018 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 1094 transitions. Word has length 264 [2023-11-29 05:12:16,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:12:16,018 INFO L495 AbstractCegarLoop]: Abstraction has 838 states and 1094 transitions. [2023-11-29 05:12:16,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 189 states, 189 states have (on average 2.417989417989418) internal successors, (457), 189 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:12:16,019 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 1094 transitions. [2023-11-29 05:12:16,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2023-11-29 05:12:16,028 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:12:16,028 INFO L195 NwaCegarLoop]: trace histogram [126, 126, 126, 61, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:12:16,049 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 05:12:16,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 05:12:16,229 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:12:16,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:12:16,229 INFO L85 PathProgramCache]: Analyzing trace with hash 271285091, now seen corresponding path program 6 times [2023-11-29 05:12:16,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:12:16,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042454362] [2023-11-29 05:12:16,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:12:16,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:12:16,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:12:19,780 INFO L134 CoverageAnalysis]: Checked inductivity of 25650 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 23759 trivial. 0 not checked. [2023-11-29 05:12:19,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:12:19,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042454362] [2023-11-29 05:12:19,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042454362] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:12:19,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444222412] [2023-11-29 05:12:19,781 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:12:19,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:12:19,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:12:19,782 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:12:19,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 05:12:20,631 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2023-11-29 05:12:20,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:12:20,637 INFO L262 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-29 05:12:20,644 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:12:22,496 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:12:22,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 13 [2023-11-29 05:12:22,534 INFO L134 CoverageAnalysis]: Checked inductivity of 25650 backedges. 0 proven. 1004 refuted. 0 times theorem prover too weak. 24646 trivial. 0 not checked. [2023-11-29 05:12:22,534 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:12:24,772 INFO L349 Elim1Store]: treesize reduction 13, result has 73.5 percent of original size [2023-11-29 05:12:24,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 49 treesize of output 47 [2023-11-29 05:12:24,952 INFO L134 CoverageAnalysis]: Checked inductivity of 25650 backedges. 124 proven. 880 refuted. 0 times theorem prover too weak. 24646 trivial. 0 not checked. [2023-11-29 05:12:24,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444222412] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:12:24,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:12:24,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 15, 14] total 90 [2023-11-29 05:12:24,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560978156] [2023-11-29 05:12:24,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:12:24,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2023-11-29 05:12:24,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:12:24,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2023-11-29 05:12:24,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2130, Invalid=5880, Unknown=0, NotChecked=0, Total=8010 [2023-11-29 05:12:24,956 INFO L87 Difference]: Start difference. First operand 838 states and 1094 transitions. Second operand has 90 states, 90 states have (on average 1.511111111111111) internal successors, (136), 90 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:12:28,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:12:28,611 INFO L93 Difference]: Finished difference Result 2011 states and 2655 transitions. [2023-11-29 05:12:28,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-11-29 05:12:28,612 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.511111111111111) internal successors, (136), 90 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 457 [2023-11-29 05:12:28,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:12:28,619 INFO L225 Difference]: With dead ends: 2011 [2023-11-29 05:12:28,619 INFO L226 Difference]: Without dead ends: 1236 [2023-11-29 05:12:28,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1058 GetRequests, 887 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5672 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=6376, Invalid=23380, Unknown=0, NotChecked=0, Total=29756 [2023-11-29 05:12:28,623 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 60 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 05:12:28,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 349 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 05:12:28,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2023-11-29 05:12:28,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 842. [2023-11-29 05:12:28,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 1.305588585017836) internal successors, (1098), 841 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:12:28,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1098 transitions. [2023-11-29 05:12:28,693 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1098 transitions. Word has length 457 [2023-11-29 05:12:28,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:12:28,693 INFO L495 AbstractCegarLoop]: Abstraction has 842 states and 1098 transitions. [2023-11-29 05:12:28,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.511111111111111) internal successors, (136), 90 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:12:28,694 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1098 transitions. [2023-11-29 05:12:28,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2023-11-29 05:12:28,698 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:12:28,698 INFO L195 NwaCegarLoop]: trace histogram [126, 126, 126, 62, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:12:28,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 05:12:28,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 05:12:28,899 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:12:28,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:12:28,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1691151497, now seen corresponding path program 7 times [2023-11-29 05:12:28,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:12:28,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70660246] [2023-11-29 05:12:28,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:12:28,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:12:29,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:12:32,739 INFO L134 CoverageAnalysis]: Checked inductivity of 25720 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 23767 trivial. 0 not checked. [2023-11-29 05:12:32,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:12:32,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70660246] [2023-11-29 05:12:32,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70660246] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:12:32,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126750969] [2023-11-29 05:12:32,739 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:12:32,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:12:32,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:12:32,741 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:12:32,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 05:12:33,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:12:33,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 1662 conjuncts, 64 conjunts are in the unsatisfiable core [2023-11-29 05:12:33,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:12:33,242 INFO L134 CoverageAnalysis]: Checked inductivity of 25720 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 23767 trivial. 0 not checked. [2023-11-29 05:12:33,242 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:12:37,216 INFO L134 CoverageAnalysis]: Checked inductivity of 25720 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 23767 trivial. 0 not checked. [2023-11-29 05:12:37,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126750969] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:12:37,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:12:37,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 64] total 128 [2023-11-29 05:12:37,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793177631] [2023-11-29 05:12:37,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:12:37,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2023-11-29 05:12:37,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:12:37,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2023-11-29 05:12:37,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2023-11-29 05:12:37,224 INFO L87 Difference]: Start difference. First operand 842 states and 1098 transitions. Second operand has 129 states, 129 states have (on average 1.124031007751938) internal successors, (145), 128 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:12:37,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:12:37,473 INFO L93 Difference]: Finished difference Result 1684 states and 2259 transitions. [2023-11-29 05:12:37,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2023-11-29 05:12:37,474 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 1.124031007751938) internal successors, (145), 128 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 461 [2023-11-29 05:12:37,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:12:37,477 INFO L225 Difference]: With dead ends: 1684 [2023-11-29 05:12:37,478 INFO L226 Difference]: Without dead ends: 906 [2023-11-29 05:12:37,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 984 GetRequests, 857 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2023-11-29 05:12:37,480 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:12:37,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 98 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:12:37,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2023-11-29 05:12:37,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 906. [2023-11-29 05:12:37,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 905 states have (on average 1.2839779005524863) internal successors, (1162), 905 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:12:37,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 1162 transitions. [2023-11-29 05:12:37,521 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 1162 transitions. Word has length 461 [2023-11-29 05:12:37,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:12:37,522 INFO L495 AbstractCegarLoop]: Abstraction has 906 states and 1162 transitions. [2023-11-29 05:12:37,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 1.124031007751938) internal successors, (145), 128 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:12:37,522 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 1162 transitions. [2023-11-29 05:12:37,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2023-11-29 05:12:37,526 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:12:37,526 INFO L195 NwaCegarLoop]: trace histogram [126, 126, 126, 126, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:12:37,534 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 05:12:37,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 05:12:37,727 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:12:37,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:12:37,727 INFO L85 PathProgramCache]: Analyzing trace with hash 440664201, now seen corresponding path program 8 times [2023-11-29 05:12:37,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:12:37,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166207528] [2023-11-29 05:12:37,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:12:37,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:12:37,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:12:49,365 INFO L134 CoverageAnalysis]: Checked inductivity of 31768 backedges. 0 proven. 8001 refuted. 0 times theorem prover too weak. 23767 trivial. 0 not checked. [2023-11-29 05:12:49,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:12:49,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166207528] [2023-11-29 05:12:49,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166207528] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:12:49,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044179157] [2023-11-29 05:12:49,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:12:49,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:12:49,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:12:49,367 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:12:49,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 05:12:49,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:12:49,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:12:49,861 INFO L262 TraceCheckSpWp]: Trace formula consists of 2238 conjuncts, 128 conjunts are in the unsatisfiable core [2023-11-29 05:12:49,874 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:12:50,064 INFO L134 CoverageAnalysis]: Checked inductivity of 31768 backedges. 0 proven. 8001 refuted. 0 times theorem prover too weak. 23767 trivial. 0 not checked. [2023-11-29 05:12:50,064 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:13:05,550 INFO L134 CoverageAnalysis]: Checked inductivity of 31768 backedges. 0 proven. 8001 refuted. 0 times theorem prover too weak. 23767 trivial. 0 not checked. [2023-11-29 05:13:05,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044179157] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:13:05,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:13:05,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [128, 128, 128] total 256 [2023-11-29 05:13:05,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044469045] [2023-11-29 05:13:05,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:13:05,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 257 states [2023-11-29 05:13:05,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:13:05,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 257 interpolants. [2023-11-29 05:13:05,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32896, Invalid=32896, Unknown=0, NotChecked=0, Total=65792 [2023-11-29 05:13:05,561 INFO L87 Difference]: Start difference. First operand 906 states and 1162 transitions. Second operand has 257 states, 257 states have (on average 1.0622568093385214) internal successors, (273), 256 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:13:06,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:13:06,413 INFO L93 Difference]: Finished difference Result 1812 states and 2451 transitions. [2023-11-29 05:13:06,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 256 states. [2023-11-29 05:13:06,414 INFO L78 Accepts]: Start accepts. Automaton has has 257 states, 257 states have (on average 1.0622568093385214) internal successors, (273), 256 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 525 [2023-11-29 05:13:06,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:13:06,420 INFO L225 Difference]: With dead ends: 1812 [2023-11-29 05:13:06,420 INFO L226 Difference]: Without dead ends: 1034 [2023-11-29 05:13:06,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1176 GetRequests, 921 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=32896, Invalid=32896, Unknown=0, NotChecked=0, Total=65792 [2023-11-29 05:13:06,424 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:13:06,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 66 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:13:06,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2023-11-29 05:13:06,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 1034. [2023-11-29 05:13:06,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 1033 states have (on average 1.2487899322362053) internal successors, (1290), 1033 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:13:06,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1290 transitions. [2023-11-29 05:13:06,471 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1290 transitions. Word has length 525 [2023-11-29 05:13:06,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:13:06,471 INFO L495 AbstractCegarLoop]: Abstraction has 1034 states and 1290 transitions. [2023-11-29 05:13:06,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 257 states, 257 states have (on average 1.0622568093385214) internal successors, (273), 256 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:13:06,472 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1290 transitions. [2023-11-29 05:13:06,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 654 [2023-11-29 05:13:06,475 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:13:06,476 INFO L195 NwaCegarLoop]: trace histogram [254, 126, 126, 126, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:13:06,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-29 05:13:06,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 05:13:06,676 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:13:06,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:13:06,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1118689143, now seen corresponding path program 9 times [2023-11-29 05:13:06,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:13:06,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257550516] [2023-11-29 05:13:06,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:13:06,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:13:07,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:13:49,832 INFO L134 CoverageAnalysis]: Checked inductivity of 56152 backedges. 0 proven. 32385 refuted. 0 times theorem prover too weak. 23767 trivial. 0 not checked. [2023-11-29 05:13:49,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:13:49,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257550516] [2023-11-29 05:13:49,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257550516] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:13:49,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519943078] [2023-11-29 05:13:49,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:13:49,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:13:49,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:13:49,834 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:13:49,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 05:13:53,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2023-11-29 05:13:53,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:13:53,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-29 05:13:53,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:13:56,712 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:13:56,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 13 [2023-11-29 05:13:56,825 INFO L134 CoverageAnalysis]: Checked inductivity of 56152 backedges. 1 proven. 1379 refuted. 0 times theorem prover too weak. 54772 trivial. 0 not checked. [2023-11-29 05:13:56,825 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:14:00,630 INFO L349 Elim1Store]: treesize reduction 13, result has 73.5 percent of original size [2023-11-29 05:14:00,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 49 treesize of output 47 [2023-11-29 05:14:01,064 INFO L134 CoverageAnalysis]: Checked inductivity of 56152 backedges. 123 proven. 1257 refuted. 0 times theorem prover too weak. 54772 trivial. 0 not checked. [2023-11-29 05:14:01,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519943078] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:14:01,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:14:01,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [256, 17, 17] total 288 [2023-11-29 05:14:01,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494870434] [2023-11-29 05:14:01,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:14:01,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 288 states [2023-11-29 05:14:01,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:14:01,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 288 interpolants. [2023-11-29 05:14:01,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33039, Invalid=49617, Unknown=0, NotChecked=0, Total=82656 [2023-11-29 05:14:01,080 INFO L87 Difference]: Start difference. First operand 1034 states and 1290 transitions. Second operand has 288 states, 288 states have (on average 1.1840277777777777) internal successors, (341), 288 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:14:32,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:14:32,557 INFO L93 Difference]: Finished difference Result 2213 states and 2858 transitions. [2023-11-29 05:14:32,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 284 states. [2023-11-29 05:14:32,558 INFO L78 Accepts]: Start accepts. Automaton has has 288 states, 288 states have (on average 1.1840277777777777) internal successors, (341), 288 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 653 [2023-11-29 05:14:32,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:14:32,564 INFO L225 Difference]: With dead ends: 2213 [2023-11-29 05:14:32,564 INFO L226 Difference]: Without dead ends: 1435 [2023-11-29 05:14:32,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1829 GetRequests, 1274 SyntacticMatches, 0 SemanticMatches, 555 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46373 ImplicationChecksByTransitivity, 55.0s TimeCoverageRelationStatistics Valid=98977, Invalid=210715, Unknown=0, NotChecked=0, Total=309692 [2023-11-29 05:14:32,578 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 65 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 1187 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 1203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 05:14:32,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 381 Invalid, 1203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1187 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 05:14:32,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1435 states. [2023-11-29 05:14:32,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1435 to 1038. [2023-11-29 05:14:32,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 1037 states have (on average 1.2478302796528447) internal successors, (1294), 1037 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:14:32,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 1294 transitions. [2023-11-29 05:14:32,635 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 1294 transitions. Word has length 653 [2023-11-29 05:14:32,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:14:32,636 INFO L495 AbstractCegarLoop]: Abstraction has 1038 states and 1294 transitions. [2023-11-29 05:14:32,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 288 states, 288 states have (on average 1.1840277777777777) internal successors, (341), 288 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:14:32,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 1294 transitions. [2023-11-29 05:14:32,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 658 [2023-11-29 05:14:32,640 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:14:32,641 INFO L195 NwaCegarLoop]: trace histogram [255, 126, 126, 126, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:14:32,651 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 05:14:32,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 05:14:32,842 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:14:32,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:14:32,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1276233763, now seen corresponding path program 10 times [2023-11-29 05:14:32,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:14:32,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900128430] [2023-11-29 05:14:32,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:14:32,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:14:33,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:15:16,146 INFO L134 CoverageAnalysis]: Checked inductivity of 56418 backedges. 0 proven. 32640 refuted. 0 times theorem prover too weak. 23778 trivial. 0 not checked. [2023-11-29 05:15:16,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:15:16,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900128430] [2023-11-29 05:15:16,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900128430] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:15:16,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521158353] [2023-11-29 05:15:16,147 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:15:16,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:15:16,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:15:16,148 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:15:16,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 05:15:16,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:15:16,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:15:17,013 INFO L262 TraceCheckSpWp]: Trace formula consists of 3411 conjuncts, 128 conjunts are in the unsatisfiable core [2023-11-29 05:15:17,023 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:15:33,975 INFO L134 CoverageAnalysis]: Checked inductivity of 56418 backedges. 1 proven. 23751 refuted. 0 times theorem prover too weak. 32666 trivial. 0 not checked. [2023-11-29 05:15:33,975 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:16:04,669 INFO L134 CoverageAnalysis]: Checked inductivity of 56418 backedges. 1 proven. 23751 refuted. 0 times theorem prover too weak. 32666 trivial. 0 not checked. [2023-11-29 05:16:04,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521158353] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:16:04,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:16:04,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [257, 129, 129] total 512 [2023-11-29 05:16:04,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044673630] [2023-11-29 05:16:04,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:16:04,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 512 states [2023-11-29 05:16:04,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:16:04,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 512 interpolants. [2023-11-29 05:16:04,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65792, Invalid=195840, Unknown=0, NotChecked=0, Total=261632 [2023-11-29 05:16:04,692 INFO L87 Difference]: Start difference. First operand 1038 states and 1294 transitions. Second operand has 512 states, 512 states have (on average 2.0234375) internal successors, (1036), 512 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:16:27,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:16:27,258 INFO L93 Difference]: Finished difference Result 2588 states and 3612 transitions. [2023-11-29 05:16:27,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 512 states. [2023-11-29 05:16:27,259 INFO L78 Accepts]: Start accepts. Automaton has has 512 states, 512 states have (on average 2.0234375) internal successors, (1036), 512 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 657 [2023-11-29 05:16:27,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:16:27,268 INFO L225 Difference]: With dead ends: 2588 [2023-11-29 05:16:27,268 INFO L226 Difference]: Without dead ends: 1807 [2023-11-29 05:16:27,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1569 GetRequests, 1059 SyntacticMatches, 0 SemanticMatches, 510 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64770 ImplicationChecksByTransitivity, 67.0s TimeCoverageRelationStatistics Valid=65792, Invalid=195840, Unknown=0, NotChecked=0, Total=261632 [2023-11-29 05:16:27,280 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1416 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1416 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 1085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-29 05:16:27,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1416 Valid, 401 Invalid, 1085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1083 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-29 05:16:27,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2023-11-29 05:16:27,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 1807. [2023-11-29 05:16:27,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1807 states, 1806 states have (on average 1.2840531561461794) internal successors, (2319), 1806 states have internal predecessors, (2319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:16:27,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1807 states to 1807 states and 2319 transitions. [2023-11-29 05:16:27,378 INFO L78 Accepts]: Start accepts. Automaton has 1807 states and 2319 transitions. Word has length 657 [2023-11-29 05:16:27,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:16:27,379 INFO L495 AbstractCegarLoop]: Abstraction has 1807 states and 2319 transitions. [2023-11-29 05:16:27,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 512 states, 512 states have (on average 2.0234375) internal successors, (1036), 512 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:16:27,380 INFO L276 IsEmpty]: Start isEmpty. Operand 1807 states and 2319 transitions. [2023-11-29 05:16:27,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1043 [2023-11-29 05:16:27,389 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:16:27,389 INFO L195 NwaCegarLoop]: trace histogram [256, 254, 254, 254, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:16:27,401 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 05:16:27,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:16:27,590 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:16:27,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:16:27,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1848143048, now seen corresponding path program 11 times [2023-11-29 05:16:27,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:16:27,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932723455] [2023-11-29 05:16:27,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:16:27,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:16:28,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:17:28,601 INFO L134 CoverageAnalysis]: Checked inductivity of 129570 backedges. 0 proven. 32896 refuted. 0 times theorem prover too weak. 96674 trivial. 0 not checked. [2023-11-29 05:17:28,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:17:28,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932723455] [2023-11-29 05:17:28,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932723455] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:17:28,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392988974] [2023-11-29 05:17:28,602 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:17:28,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:17:28,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:17:28,603 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:17:28,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d004b92-7291-4cdb-8f18-506326b94169/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process