./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/sina1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/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_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/sina1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/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_a4c3c245-e14e-46b4-9b37-b5dade97d40e/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 b1c30dcb0753c92b26d7933797d6cb35ad9e557c83930a4dbbba40b5521c6adf --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 06:19:53,784 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 06:19:53,849 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 06:19:53,853 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 06:19:53,854 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 06:19:53,879 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 06:19:53,880 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 06:19:53,880 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 06:19:53,881 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 06:19:53,881 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 06:19:53,882 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 06:19:53,882 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 06:19:53,883 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 06:19:53,884 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 06:19:53,884 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 06:19:53,885 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 06:19:53,885 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 06:19:53,886 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 06:19:53,886 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 06:19:53,887 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 06:19:53,887 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 06:19:53,888 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 06:19:53,888 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 06:19:53,889 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 06:19:53,889 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 06:19:53,890 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 06:19:53,890 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 06:19:53,891 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 06:19:53,891 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 06:19:53,892 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 06:19:53,892 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 06:19:53,892 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:19:53,893 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 06:19:53,893 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 06:19:53,893 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 06:19:53,893 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 06:19:53,893 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 06:19:53,894 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 06:19:53,894 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 06:19:53,894 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 06:19:53,894 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 06:19:53,894 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 06:19:53,895 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_a4c3c245-e14e-46b4-9b37-b5dade97d40e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b1c30dcb0753c92b26d7933797d6cb35ad9e557c83930a4dbbba40b5521c6adf [2023-11-29 06:19:54,119 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 06:19:54,140 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 06:19:54,143 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 06:19:54,144 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 06:19:54,145 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 06:19:54,146 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/array-fpi/sina1.c [2023-11-29 06:19:56,924 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 06:19:57,081 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 06:19:57,081 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/sv-benchmarks/c/array-fpi/sina1.c [2023-11-29 06:19:57,088 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/data/7b022a1d5/cd21a79c22cb412d9e6cc76b8f6e08dd/FLAG78d257dcc [2023-11-29 06:19:57,102 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/data/7b022a1d5/cd21a79c22cb412d9e6cc76b8f6e08dd [2023-11-29 06:19:57,104 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 06:19:57,105 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 06:19:57,106 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 06:19:57,106 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 06:19:57,112 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 06:19:57,113 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:19:57" (1/1) ... [2023-11-29 06:19:57,113 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4620747e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:19:57, skipping insertion in model container [2023-11-29 06:19:57,114 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:19:57" (1/1) ... [2023-11-29 06:19:57,130 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 06:19:57,252 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_a4c3c245-e14e-46b4-9b37-b5dade97d40e/sv-benchmarks/c/array-fpi/sina1.c[588,601] [2023-11-29 06:19:57,268 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:19:57,275 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 06:19:57,286 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_a4c3c245-e14e-46b4-9b37-b5dade97d40e/sv-benchmarks/c/array-fpi/sina1.c[588,601] [2023-11-29 06:19:57,293 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:19:57,307 INFO L206 MainTranslator]: Completed translation [2023-11-29 06:19:57,308 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:19:57 WrapperNode [2023-11-29 06:19:57,308 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 06:19:57,309 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 06:19:57,309 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 06:19:57,309 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 06:19:57,314 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:19:57" (1/1) ... [2023-11-29 06:19:57,321 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:19:57" (1/1) ... [2023-11-29 06:19:57,342 INFO L138 Inliner]: procedures = 17, calls = 27, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2023-11-29 06:19:57,343 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 06:19:57,344 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 06:19:57,344 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 06:19:57,344 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 06:19:57,353 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:19:57" (1/1) ... [2023-11-29 06:19:57,353 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:19:57" (1/1) ... [2023-11-29 06:19:57,355 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:19:57" (1/1) ... [2023-11-29 06:19:57,369 INFO L175 MemorySlicer]: Split 16 memory accesses to 4 slices as follows [2, 8, 2, 4]. 50 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0, 0]. The 3 writes are split as follows [0, 0, 1, 2]. [2023-11-29 06:19:57,369 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:19:57" (1/1) ... [2023-11-29 06:19:57,369 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:19:57" (1/1) ... [2023-11-29 06:19:57,375 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:19:57" (1/1) ... [2023-11-29 06:19:57,379 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:19:57" (1/1) ... [2023-11-29 06:19:57,380 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:19:57" (1/1) ... [2023-11-29 06:19:57,382 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:19:57" (1/1) ... [2023-11-29 06:19:57,384 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 06:19:57,385 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 06:19:57,386 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 06:19:57,386 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 06:19:57,387 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:19:57" (1/1) ... [2023-11-29 06:19:57,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:19:57,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:19:57,416 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 06:19:57,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 06:19:57,455 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 06:19:57,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 06:19:57,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 06:19:57,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 06:19:57,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 06:19:57,456 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 06:19:57,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 06:19:57,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 06:19:57,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 06:19:57,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 06:19:57,457 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 06:19:57,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 06:19:57,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 06:19:57,457 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 06:19:57,457 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 06:19:57,458 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 06:19:57,458 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 06:19:57,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 06:19:57,547 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 06:19:57,549 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 06:19:57,678 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 06:19:57,706 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 06:19:57,706 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-29 06:19:57,707 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:19:57 BoogieIcfgContainer [2023-11-29 06:19:57,707 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 06:19:57,710 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 06:19:57,710 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 06:19:57,713 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 06:19:57,713 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:19:57" (1/3) ... [2023-11-29 06:19:57,714 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12146d09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:19:57, skipping insertion in model container [2023-11-29 06:19:57,714 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:19:57" (2/3) ... [2023-11-29 06:19:57,714 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12146d09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:19:57, skipping insertion in model container [2023-11-29 06:19:57,714 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:19:57" (3/3) ... [2023-11-29 06:19:57,716 INFO L112 eAbstractionObserver]: Analyzing ICFG sina1.c [2023-11-29 06:19:57,735 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 06:19:57,735 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 06:19:57,783 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 06:19:57,789 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;@74d5c596, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 06:19:57,790 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 06:19:57,794 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:19:57,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-29 06:19:57,800 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:19:57,800 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:19:57,801 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:19:57,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:19:57,806 INFO L85 PathProgramCache]: Analyzing trace with hash 955298750, now seen corresponding path program 1 times [2023-11-29 06:19:57,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:19:57,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280653233] [2023-11-29 06:19:57,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:19:57,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:19:57,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:19:57,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:19:57,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:19:57,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280653233] [2023-11-29 06:19:57,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280653233] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:19:57,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:19:57,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:19:58,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185303269] [2023-11-29 06:19:58,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:19:58,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 06:19:58,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:19:58,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 06:19:58,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 06:19:58,034 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 15 states have internal predecessors, (24), 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 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:19:58,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:19:58,059 INFO L93 Difference]: Finished difference Result 29 states and 43 transitions. [2023-11-29 06:19:58,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 06:19:58,062 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 11 [2023-11-29 06:19:58,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:19:58,068 INFO L225 Difference]: With dead ends: 29 [2023-11-29 06:19:58,068 INFO L226 Difference]: Without dead ends: 13 [2023-11-29 06:19:58,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 06:19:58,075 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:19:58,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:19:58,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-11-29 06:19:58,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-11-29 06:19:58,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:19:58,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2023-11-29 06:19:58,107 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 11 [2023-11-29 06:19:58,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:19:58,107 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2023-11-29 06:19:58,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:19:58,108 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2023-11-29 06:19:58,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-29 06:19:58,108 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:19:58,108 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:19:58,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 06:19:58,109 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:19:58,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:19:58,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1635357120, now seen corresponding path program 1 times [2023-11-29 06:19:58,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:19:58,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562411379] [2023-11-29 06:19:58,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:19:58,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:19:58,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:19:58,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:19:58,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:19:58,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562411379] [2023-11-29 06:19:58,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562411379] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:19:58,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:19:58,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 06:19:58,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414558064] [2023-11-29 06:19:58,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:19:58,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:19:58,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:19:58,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:19:58,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:19:58,262 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:19:58,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:19:58,301 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2023-11-29 06:19:58,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:19:58,301 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 11 [2023-11-29 06:19:58,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:19:58,302 INFO L225 Difference]: With dead ends: 28 [2023-11-29 06:19:58,302 INFO L226 Difference]: Without dead ends: 20 [2023-11-29 06:19:58,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:19:58,304 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 16 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:19:58,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 11 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:19:58,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-29 06:19:58,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 15. [2023-11-29 06:19:58,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:19:58,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2023-11-29 06:19:58,311 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2023-11-29 06:19:58,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:19:58,312 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2023-11-29 06:19:58,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:19:58,312 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2023-11-29 06:19:58,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-29 06:19:58,313 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:19:58,313 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:19:58,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 06:19:58,313 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:19:58,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:19:58,314 INFO L85 PathProgramCache]: Analyzing trace with hash 714025838, now seen corresponding path program 1 times [2023-11-29 06:19:58,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:19:58,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737693436] [2023-11-29 06:19:58,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:19:58,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:19:58,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:19:58,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:19:58,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:19:58,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737693436] [2023-11-29 06:19:58,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737693436] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:19:58,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260934424] [2023-11-29 06:19:58,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:19:58,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:19:58,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:19:58,960 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:19:58,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 06:19:59,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:19:59,053 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-29 06:19:59,059 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:19:59,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:19:59,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:19:59,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:19:59,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:19:59,309 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:19:59,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-11-29 06:19:59,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2023-11-29 06:19:59,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:19:59,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260934424] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:19:59,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:19:59,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2023-11-29 06:19:59,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390267995] [2023-11-29 06:19:59,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:19:59,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 06:19:59,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:19:59,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 06:19:59,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2023-11-29 06:19:59,457 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:19:59,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:19:59,790 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2023-11-29 06:19:59,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 06:19:59,790 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 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 06:19:59,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:19:59,791 INFO L225 Difference]: With dead ends: 32 [2023-11-29 06:19:59,791 INFO L226 Difference]: Without dead ends: 30 [2023-11-29 06:19:59,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=181, Invalid=575, Unknown=0, NotChecked=0, Total=756 [2023-11-29 06:19:59,793 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 67 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:19:59,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 69 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:19:59,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-11-29 06:19:59,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 22. [2023-11-29 06:19:59,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:19:59,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-11-29 06:19:59,801 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 13 [2023-11-29 06:19:59,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:19:59,801 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-11-29 06:19:59,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:19:59,802 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-11-29 06:19:59,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-29 06:19:59,802 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:19:59,802 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:19:59,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 06:20:00,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:00,005 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:20:00,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:20:00,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1737434127, now seen corresponding path program 2 times [2023-11-29 06:20:00,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:20:00,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720585821] [2023-11-29 06:20:00,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:00,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:20:00,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:20:00,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:20:00,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:20:00,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720585821] [2023-11-29 06:20:00,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720585821] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:20:00,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334344427] [2023-11-29 06:20:00,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:20:00,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:00,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:20:00,098 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:20:00,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 06:20:00,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:20:00,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:20:00,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:20:00,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:20:00,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:20:00,220 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:20:00,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:20:00,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334344427] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:20:00,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:20:00,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-29 06:20:00,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174650616] [2023-11-29 06:20:00,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:20:00,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 06:20:00,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:20:00,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 06:20:00,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-29 06:20:00,267 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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 06:20:00,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:20:00,399 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2023-11-29 06:20:00,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 06:20:00,400 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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 14 [2023-11-29 06:20:00,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:20:00,401 INFO L225 Difference]: With dead ends: 45 [2023-11-29 06:20:00,401 INFO L226 Difference]: Without dead ends: 39 [2023-11-29 06:20:00,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-11-29 06:20:00,402 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 47 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:20:00,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 46 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:20:00,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-11-29 06:20:00,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 23. [2023-11-29 06:20:00,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:20:00,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-11-29 06:20:00,410 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 14 [2023-11-29 06:20:00,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:20:00,411 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-11-29 06:20:00,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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 06:20:00,411 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-11-29 06:20:00,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-29 06:20:00,411 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:20:00,412 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:20:00,417 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 06:20:00,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:00,613 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:20:00,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:20:00,613 INFO L85 PathProgramCache]: Analyzing trace with hash -865209408, now seen corresponding path program 3 times [2023-11-29 06:20:00,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:20:00,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65359337] [2023-11-29 06:20:00,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:00,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:20:00,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:20:01,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:20:01,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:20:01,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65359337] [2023-11-29 06:20:01,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65359337] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:20:01,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534515897] [2023-11-29 06:20:01,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:20:01,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:01,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:20:01,201 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:20:01,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 06:20:01,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 06:20:01,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:20:01,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-29 06:20:01,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:20:01,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:20:01,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:20:01,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:20:01,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:20:01,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:20:01,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-11-29 06:20:01,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:20:01,630 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:20:01,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2023-11-29 06:20:01,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 46 [2023-11-29 06:20:01,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:20:01,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534515897] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:20:01,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:20:01,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 27 [2023-11-29 06:20:01,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642415179] [2023-11-29 06:20:01,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:20:01,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 06:20:01,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:20:01,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 06:20:01,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2023-11-29 06:20:01,937 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 27 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 27 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:20:03,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:20:03,399 INFO L93 Difference]: Finished difference Result 84 states and 98 transitions. [2023-11-29 06:20:03,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-29 06:20:03,399 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 27 states have internal predecessors, (36), 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 15 [2023-11-29 06:20:03,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:20:03,400 INFO L225 Difference]: With dead ends: 84 [2023-11-29 06:20:03,401 INFO L226 Difference]: Without dead ends: 75 [2023-11-29 06:20:03,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=564, Invalid=2976, Unknown=0, NotChecked=0, Total=3540 [2023-11-29 06:20:03,404 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 190 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:20:03,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 88 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 06:20:03,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-11-29 06:20:03,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 41. [2023-11-29 06:20:03,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.25) internal successors, (50), 40 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:20:03,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2023-11-29 06:20:03,421 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 15 [2023-11-29 06:20:03,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:20:03,421 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2023-11-29 06:20:03,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 27 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:20:03,422 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2023-11-29 06:20:03,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-29 06:20:03,422 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:20:03,422 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:20:03,428 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 06:20:03,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:03,624 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:20:03,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:20:03,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1424043848, now seen corresponding path program 1 times [2023-11-29 06:20:03,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:20:03,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331475995] [2023-11-29 06:20:03,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:03,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:20:03,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:20:03,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:20:03,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:20:03,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331475995] [2023-11-29 06:20:03,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331475995] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:20:03,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276487698] [2023-11-29 06:20:03,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:03,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:03,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:20:03,704 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:20:03,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 06:20:03,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:20:03,777 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:20:03,778 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:20:03,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:20:03,825 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:20:03,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:20:03,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276487698] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:20:03,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:20:03,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-29 06:20:03,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101195466] [2023-11-29 06:20:03,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:20:03,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 06:20:03,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:20:03,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 06:20:03,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-29 06:20:03,863 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:20:03,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:20:03,953 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2023-11-29 06:20:03,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 06:20:03,953 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 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 06:20:03,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:20:03,954 INFO L225 Difference]: With dead ends: 71 [2023-11-29 06:20:03,954 INFO L226 Difference]: Without dead ends: 47 [2023-11-29 06:20:03,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-11-29 06:20:03,956 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 16 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:20:03,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 36 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:20:03,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-29 06:20:03,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2023-11-29 06:20:03,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:20:03,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2023-11-29 06:20:03,968 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 16 [2023-11-29 06:20:03,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:20:03,968 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2023-11-29 06:20:03,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:20:03,969 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2023-11-29 06:20:03,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-29 06:20:03,969 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:20:03,969 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:20:03,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-29 06:20:04,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:04,176 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:20:04,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:20:04,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1349497050, now seen corresponding path program 2 times [2023-11-29 06:20:04,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:20:04,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787338308] [2023-11-29 06:20:04,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:04,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:20:04,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:20:04,596 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:20:04,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:20:04,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787338308] [2023-11-29 06:20:04,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787338308] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:20:04,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46031636] [2023-11-29 06:20:04,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:20:04,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:04,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:20:04,598 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:20:04,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 06:20:04,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:20:04,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:20:04,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-29 06:20:04,685 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:20:04,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:20:04,769 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:20:04,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:20:04,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:20:05,149 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:20:05,150 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:20:05,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2023-11-29 06:20:05,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-11-29 06:20:05,451 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:20:05,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46031636] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:20:05,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:20:05,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 12] total 32 [2023-11-29 06:20:05,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556159212] [2023-11-29 06:20:05,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:20:05,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-29 06:20:05,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:20:05,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-29 06:20:05,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=847, Unknown=0, NotChecked=0, Total=992 [2023-11-29 06:20:05,454 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 32 states, 32 states have (on average 1.4375) internal successors, (46), 32 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:20:06,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:20:06,412 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2023-11-29 06:20:06,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-29 06:20:06,412 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.4375) internal successors, (46), 32 states have internal predecessors, (46), 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 18 [2023-11-29 06:20:06,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:20:06,413 INFO L225 Difference]: With dead ends: 64 [2023-11-29 06:20:06,413 INFO L226 Difference]: Without dead ends: 52 [2023-11-29 06:20:06,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=596, Invalid=2944, Unknown=0, NotChecked=0, Total=3540 [2023-11-29 06:20:06,415 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 109 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:20:06,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 75 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:20:06,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-11-29 06:20:06,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 36. [2023-11-29 06:20:06,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 35 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:20:06,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2023-11-29 06:20:06,427 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 18 [2023-11-29 06:20:06,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:20:06,427 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2023-11-29 06:20:06,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.4375) internal successors, (46), 32 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:20:06,427 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2023-11-29 06:20:06,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-29 06:20:06,428 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:20:06,428 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:20:06,433 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 06:20:06,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:06,629 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:20:06,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:20:06,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1105641471, now seen corresponding path program 4 times [2023-11-29 06:20:06,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:20:06,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515250069] [2023-11-29 06:20:06,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:06,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:20:06,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:20:06,773 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:20:06,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:20:06,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515250069] [2023-11-29 06:20:06,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515250069] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:20:06,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119843964] [2023-11-29 06:20:06,774 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:20:06,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:06,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:20:06,775 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:20:06,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 06:20:06,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:20:06,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:20:06,845 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 06:20:06,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:20:06,901 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:20:06,902 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:20:06,965 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:20:06,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119843964] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:20:06,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:20:06,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2023-11-29 06:20:06,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488874416] [2023-11-29 06:20:06,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:20:06,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 06:20:06,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:20:06,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 06:20:06,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2023-11-29 06:20:06,967 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 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 06:20:07,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:20:07,192 INFO L93 Difference]: Finished difference Result 91 states and 103 transitions. [2023-11-29 06:20:07,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 06:20:07,193 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 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) Word has length 18 [2023-11-29 06:20:07,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:20:07,193 INFO L225 Difference]: With dead ends: 91 [2023-11-29 06:20:07,194 INFO L226 Difference]: Without dead ends: 76 [2023-11-29 06:20:07,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=238, Invalid=692, Unknown=0, NotChecked=0, Total=930 [2023-11-29 06:20:07,195 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 97 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:20:07,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 161 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:20:07,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-11-29 06:20:07,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 31. [2023-11-29 06:20:07,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:20:07,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2023-11-29 06:20:07,203 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 18 [2023-11-29 06:20:07,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:20:07,203 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2023-11-29 06:20:07,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 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 06:20:07,204 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2023-11-29 06:20:07,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-29 06:20:07,204 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:20:07,204 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:20:07,209 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 06:20:07,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:07,405 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:20:07,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:20:07,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1948195384, now seen corresponding path program 3 times [2023-11-29 06:20:07,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:20:07,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451949606] [2023-11-29 06:20:07,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:07,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:20:07,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:20:08,046 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:20:08,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:20:08,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451949606] [2023-11-29 06:20:08,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451949606] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:20:08,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590166599] [2023-11-29 06:20:08,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:20:08,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:08,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:20:08,048 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:20:08,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 06:20:08,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 06:20:08,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:20:08,121 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-29 06:20:08,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:20:08,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:20:08,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:20:08,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:20:08,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:20:08,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:20:08,280 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 06:20:08,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2023-11-29 06:20:08,422 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:20:08,422 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:20:08,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2023-11-29 06:20:08,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 54 [2023-11-29 06:20:08,680 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:20:08,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590166599] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:20:08,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:20:08,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 13] total 31 [2023-11-29 06:20:08,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109325179] [2023-11-29 06:20:08,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:20:08,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-29 06:20:08,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:20:08,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-29 06:20:08,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2023-11-29 06:20:08,683 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 31 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 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 06:20:09,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:20:09,316 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2023-11-29 06:20:09,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-29 06:20:09,316 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 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) Word has length 20 [2023-11-29 06:20:09,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:20:09,317 INFO L225 Difference]: With dead ends: 66 [2023-11-29 06:20:09,317 INFO L226 Difference]: Without dead ends: 55 [2023-11-29 06:20:09,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=379, Invalid=2273, Unknown=0, NotChecked=0, Total=2652 [2023-11-29 06:20:09,318 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 71 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:20:09,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 114 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:20:09,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-29 06:20:09,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2023-11-29 06:20:09,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:20:09,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2023-11-29 06:20:09,333 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 20 [2023-11-29 06:20:09,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:20:09,333 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2023-11-29 06:20:09,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 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 06:20:09,333 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2023-11-29 06:20:09,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-29 06:20:09,334 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:20:09,334 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:20:09,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 06:20:09,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:09,535 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:20:09,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:20:09,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1572653166, now seen corresponding path program 5 times [2023-11-29 06:20:09,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:20:09,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561976556] [2023-11-29 06:20:09,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:09,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:20:09,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:20:10,394 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:20:10,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:20:10,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561976556] [2023-11-29 06:20:10,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561976556] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:20:10,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612093055] [2023-11-29 06:20:10,394 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:20:10,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:10,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:20:10,396 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:20:10,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 06:20:10,504 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 06:20:10,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:20:10,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-29 06:20:10,510 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:20:10,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:20:10,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:20:10,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:20:10,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:20:10,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:20:10,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:20:10,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:20:10,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-29 06:20:10,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-29 06:20:10,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-29 06:20:10,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-29 06:20:11,017 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:20:11,017 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:20:11,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 48 [2023-11-29 06:20:11,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8778 treesize of output 8746 [2023-11-29 06:20:11,651 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:20:11,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612093055] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:20:11,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:20:11,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 47 [2023-11-29 06:20:11,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222148172] [2023-11-29 06:20:11,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:20:11,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-29 06:20:11,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:20:11,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-29 06:20:11,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1895, Unknown=0, NotChecked=0, Total=2162 [2023-11-29 06:20:11,655 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand has 47 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:20:13,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:20:13,371 INFO L93 Difference]: Finished difference Result 107 states and 120 transitions. [2023-11-29 06:20:13,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-29 06:20:13,371 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 states have internal predecessors, (54), 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 21 [2023-11-29 06:20:13,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:20:13,372 INFO L225 Difference]: With dead ends: 107 [2023-11-29 06:20:13,372 INFO L226 Difference]: Without dead ends: 93 [2023-11-29 06:20:13,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1537 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1063, Invalid=5743, Unknown=0, NotChecked=0, Total=6806 [2023-11-29 06:20:13,374 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 159 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 06:20:13,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 368 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 897 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 06:20:13,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-11-29 06:20:13,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2023-11-29 06:20:13,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1290322580645162) internal successors, (70), 62 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:20:13,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2023-11-29 06:20:13,393 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 21 [2023-11-29 06:20:13,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:20:13,394 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2023-11-29 06:20:13,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:20:13,394 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2023-11-29 06:20:13,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-29 06:20:13,395 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:20:13,395 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:20:13,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 06:20:13,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:13,595 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:20:13,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:20:13,596 INFO L85 PathProgramCache]: Analyzing trace with hash 800847278, now seen corresponding path program 4 times [2023-11-29 06:20:13,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:20:13,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269490844] [2023-11-29 06:20:13,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:13,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:20:13,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:20:14,044 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 06:20:14,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:20:14,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269490844] [2023-11-29 06:20:14,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269490844] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:20:14,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889126842] [2023-11-29 06:20:14,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:20:14,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:14,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:20:14,046 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:20:14,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 06:20:14,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:20:14,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:20:14,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-29 06:20:14,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:20:14,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-29 06:20:14,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2023-11-29 06:20:14,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2023-11-29 06:20:14,182 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2023-11-29 06:20:14,378 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 06:20:14,378 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:20:14,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2023-11-29 06:20:14,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 55 [2023-11-29 06:20:14,584 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:20:14,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 10668 treesize of output 9900 [2023-11-29 06:20:14,624 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 06:20:14,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889126842] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:20:14,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:20:14,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 30 [2023-11-29 06:20:14,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695662186] [2023-11-29 06:20:14,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:20:14,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-29 06:20:14,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:20:14,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-29 06:20:14,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2023-11-29 06:20:14,626 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 30 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:20:15,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:20:15,401 INFO L93 Difference]: Finished difference Result 101 states and 111 transitions. [2023-11-29 06:20:15,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 06:20:15,401 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 30 states have internal predecessors, (49), 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 23 [2023-11-29 06:20:15,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:20:15,402 INFO L225 Difference]: With dead ends: 101 [2023-11-29 06:20:15,402 INFO L226 Difference]: Without dead ends: 85 [2023-11-29 06:20:15,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=289, Invalid=1873, Unknown=0, NotChecked=0, Total=2162 [2023-11-29 06:20:15,404 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 71 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:20:15,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 113 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:20:15,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-11-29 06:20:15,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2023-11-29 06:20:15,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1475409836065573) internal successors, (70), 61 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:20:15,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2023-11-29 06:20:15,448 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 23 [2023-11-29 06:20:15,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:20:15,449 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2023-11-29 06:20:15,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 30 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:20:15,449 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2023-11-29 06:20:15,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-29 06:20:15,450 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:20:15,450 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:20:15,456 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 06:20:15,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:15,656 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:20:15,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:20:15,656 INFO L85 PathProgramCache]: Analyzing trace with hash -476990601, now seen corresponding path program 5 times [2023-11-29 06:20:15,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:20:15,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729698444] [2023-11-29 06:20:15,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:15,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:20:15,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:20:15,767 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 06:20:15,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:20:15,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729698444] [2023-11-29 06:20:15,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729698444] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:20:15,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672813673] [2023-11-29 06:20:15,768 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:20:15,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:15,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:20:15,769 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:20:15,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 06:20:15,873 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 06:20:15,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:20:15,875 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 06:20:15,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:20:15,945 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 06:20:15,945 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:20:16,013 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 06:20:16,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672813673] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:20:16,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:20:16,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-11-29 06:20:16,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200211886] [2023-11-29 06:20:16,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:20:16,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 06:20:16,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:20:16,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 06:20:16,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-11-29 06:20:16,015 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) 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 06:20:16,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:20:16,156 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2023-11-29 06:20:16,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 06:20:16,156 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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) Word has length 27 [2023-11-29 06:20:16,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:20:16,157 INFO L225 Difference]: With dead ends: 92 [2023-11-29 06:20:16,157 INFO L226 Difference]: Without dead ends: 78 [2023-11-29 06:20:16,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 40 SyntacticMatches, 8 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2023-11-29 06:20:16,158 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 68 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:20:16,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 62 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:20:16,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-11-29 06:20:16,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2023-11-29 06:20:16,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 61 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 06:20:16,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2023-11-29 06:20:16,181 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 27 [2023-11-29 06:20:16,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:20:16,181 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2023-11-29 06:20:16,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 06:20:16,181 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2023-11-29 06:20:16,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-29 06:20:16,182 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:20:16,183 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:20:16,188 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 06:20:16,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 06:20:16,384 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:20:16,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:20:16,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1620060640, now seen corresponding path program 6 times [2023-11-29 06:20:16,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:20:16,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724786583] [2023-11-29 06:20:16,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:16,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:20:16,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:20:16,563 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 06:20:16,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:20:16,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724786583] [2023-11-29 06:20:16,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724786583] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:20:16,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993564621] [2023-11-29 06:20:16,564 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:20:16,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:16,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:20:16,565 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:20:16,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 06:20:16,670 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-29 06:20:16,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:20:16,672 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 06:20:16,673 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:20:16,781 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 21 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 06:20:16,782 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:20:16,870 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 21 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 06:20:16,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993564621] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:20:16,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:20:16,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 25 [2023-11-29 06:20:16,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537010899] [2023-11-29 06:20:16,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:20:16,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 06:20:16,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:20:16,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 06:20:16,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2023-11-29 06:20:16,873 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:20:17,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:20:17,109 INFO L93 Difference]: Finished difference Result 133 states and 142 transitions. [2023-11-29 06:20:17,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 06:20:17,110 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 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 27 [2023-11-29 06:20:17,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:20:17,111 INFO L225 Difference]: With dead ends: 133 [2023-11-29 06:20:17,111 INFO L226 Difference]: Without dead ends: 112 [2023-11-29 06:20:17,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 36 SyntacticMatches, 7 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=304, Invalid=956, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 06:20:17,112 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 182 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:20:17,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 92 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:20:17,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-11-29 06:20:17,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 67. [2023-11-29 06:20:17,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.106060606060606) internal successors, (73), 66 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:20:17,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2023-11-29 06:20:17,141 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 27 [2023-11-29 06:20:17,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:20:17,141 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2023-11-29 06:20:17,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:20:17,141 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2023-11-29 06:20:17,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-29 06:20:17,142 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:20:17,142 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:20:17,147 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 06:20:17,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 06:20:17,343 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:20:17,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:20:17,343 INFO L85 PathProgramCache]: Analyzing trace with hash -570976538, now seen corresponding path program 7 times [2023-11-29 06:20:17,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:20:17,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490033544] [2023-11-29 06:20:17,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:17,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:20:17,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:20:18,138 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:20:18,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:20:18,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490033544] [2023-11-29 06:20:18,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490033544] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:20:18,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012989097] [2023-11-29 06:20:18,138 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 06:20:18,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:18,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:20:18,140 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:20:18,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 06:20:18,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:20:18,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-29 06:20:18,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:20:18,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-29 06:20:18,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-29 06:20:18,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-29 06:20:18,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2023-11-29 06:20:18,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2023-11-29 06:20:18,614 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 06:20:18,615 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:20:18,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 75 [2023-11-29 06:20:18,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 71 [2023-11-29 06:20:18,981 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:20:18,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108710 treesize of output 105638 [2023-11-29 06:20:19,071 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 06:20:19,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012989097] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:20:19,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:20:19,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 14] total 42 [2023-11-29 06:20:19,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984045979] [2023-11-29 06:20:19,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:20:19,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-29 06:20:19,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:20:19,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-29 06:20:19,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1551, Unknown=0, NotChecked=0, Total=1722 [2023-11-29 06:20:19,073 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand has 42 states, 42 states have (on average 1.6428571428571428) internal successors, (69), 42 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 06:20:20,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:20:20,566 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2023-11-29 06:20:20,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-11-29 06:20:20,567 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.6428571428571428) internal successors, (69), 42 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 28 [2023-11-29 06:20:20,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:20:20,568 INFO L225 Difference]: With dead ends: 110 [2023-11-29 06:20:20,568 INFO L226 Difference]: Without dead ends: 90 [2023-11-29 06:20:20,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1251 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=609, Invalid=4647, Unknown=0, NotChecked=0, Total=5256 [2023-11-29 06:20:20,571 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 131 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:20:20,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 165 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 06:20:20,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-11-29 06:20:20,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 63. [2023-11-29 06:20:20,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1290322580645162) internal successors, (70), 62 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:20:20,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2023-11-29 06:20:20,594 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 28 [2023-11-29 06:20:20,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:20:20,594 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2023-11-29 06:20:20,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.6428571428571428) internal successors, (69), 42 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 06:20:20,594 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2023-11-29 06:20:20,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-29 06:20:20,595 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:20:20,595 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:20:20,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 06:20:20,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 06:20:20,795 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:20:20,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:20:20,796 INFO L85 PathProgramCache]: Analyzing trace with hash -167148032, now seen corresponding path program 8 times [2023-11-29 06:20:20,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:20:20,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681895422] [2023-11-29 06:20:20,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:20,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:20:20,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:20:21,926 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:20:21,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:20:21,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681895422] [2023-11-29 06:20:21,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681895422] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:20:21,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147371768] [2023-11-29 06:20:21,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:20:21,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:21,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:20:21,928 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:20:21,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 06:20:22,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:20:22,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:20:22,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 64 conjunts are in the unsatisfiable core [2023-11-29 06:20:22,073 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:20:22,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:20:22,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:20:22,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:20:22,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:20:22,186 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:20:22,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:20:22,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:20:22,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:20:22,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:20:22,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-11-29 06:20:22,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:20:22,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-11-29 06:20:22,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:20:22,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-11-29 06:20:22,503 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 3 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:20:22,503 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:20:26,783 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_220| Int) (v_ArrVal_562 Int) (v_ArrVal_559 Int) (v_ArrVal_557 Int) (|v_ULTIMATE.start_main_~i~0#1_219| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_219| (+ |v_ULTIMATE.start_main_~i~0#1_220| 1)) (= c_~N~0 (select (store (store (store (select |c_#memory_int#2| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_557) (+ (* |v_ULTIMATE.start_main_~i~0#1_220| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_559) (+ (* |v_ULTIMATE.start_main_~i~0#1_219| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_562) (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (< |v_ULTIMATE.start_main_~i~0#1_220| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) is different from false [2023-11-29 06:20:26,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2023-11-29 06:20:26,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 422 treesize of output 414 [2023-11-29 06:20:27,121 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 15 trivial. 6 not checked. [2023-11-29 06:20:27,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147371768] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:20:27,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:20:27,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 16] total 44 [2023-11-29 06:20:27,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640083130] [2023-11-29 06:20:27,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:20:27,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-29 06:20:27,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:20:27,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-29 06:20:27,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1631, Unknown=1, NotChecked=82, Total=1892 [2023-11-29 06:20:27,124 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 44 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 44 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:20:37,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:20:37,106 INFO L93 Difference]: Finished difference Result 149 states and 164 transitions. [2023-11-29 06:20:37,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-29 06:20:37,106 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 44 states have internal predecessors, (63), 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 29 [2023-11-29 06:20:37,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:20:37,107 INFO L225 Difference]: With dead ends: 149 [2023-11-29 06:20:37,108 INFO L226 Difference]: Without dead ends: 127 [2023-11-29 06:20:37,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1641 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=656, Invalid=5509, Unknown=1, NotChecked=154, Total=6320 [2023-11-29 06:20:37,111 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 122 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 1093 mSolverCounterSat, 32 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 1212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1093 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2023-11-29 06:20:37,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 354 Invalid, 1212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1093 Invalid, 11 Unknown, 76 Unchecked, 8.9s Time] [2023-11-29 06:20:37,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-11-29 06:20:37,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 70. [2023-11-29 06:20:37,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.1304347826086956) internal successors, (78), 69 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:20:37,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2023-11-29 06:20:37,148 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 29 [2023-11-29 06:20:37,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:20:37,149 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2023-11-29 06:20:37,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 44 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:20:37,149 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2023-11-29 06:20:37,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-29 06:20:37,149 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:20:37,150 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:20:37,154 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 06:20:37,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 06:20:37,350 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:20:37,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:20:37,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1786871826, now seen corresponding path program 9 times [2023-11-29 06:20:37,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:20:37,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760191716] [2023-11-29 06:20:37,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:37,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:20:37,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:20:38,191 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:20:38,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:20:38,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760191716] [2023-11-29 06:20:38,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760191716] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:20:38,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841507859] [2023-11-29 06:20:38,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:20:38,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:38,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:20:38,194 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:20:38,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 06:20:38,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-29 06:20:38,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:20:38,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 78 conjunts are in the unsatisfiable core [2023-11-29 06:20:38,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:20:38,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:20:38,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:20:38,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:20:38,452 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:20:38,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:20:38,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:20:38,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 06:20:38,618 INFO L349 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-11-29 06:20:38,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2023-11-29 06:20:38,682 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-29 06:20:38,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 39 [2023-11-29 06:20:39,267 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:20:39,267 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:20:40,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 89 [2023-11-29 06:20:40,147 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-29 06:20:40,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 280 [2023-11-29 06:20:40,769 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:20:40,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841507859] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:20:40,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:20:40,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24, 25] total 60 [2023-11-29 06:20:40,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592800956] [2023-11-29 06:20:40,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:20:40,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-11-29 06:20:40,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:20:40,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-11-29 06:20:40,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=514, Invalid=3026, Unknown=0, NotChecked=0, Total=3540 [2023-11-29 06:20:40,773 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand has 60 states, 60 states have (on average 1.4333333333333333) internal successors, (86), 60 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:20:49,374 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:20:49,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:20:49,740 INFO L93 Difference]: Finished difference Result 121 states and 129 transitions. [2023-11-29 06:20:49,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-11-29 06:20:49,741 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.4333333333333333) internal successors, (86), 60 states have internal predecessors, (86), 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 33 [2023-11-29 06:20:49,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:20:49,741 INFO L225 Difference]: With dead ends: 121 [2023-11-29 06:20:49,741 INFO L226 Difference]: Without dead ends: 58 [2023-11-29 06:20:49,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2439 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1614, Invalid=7698, Unknown=0, NotChecked=0, Total=9312 [2023-11-29 06:20:49,745 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 157 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 106 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2023-11-29 06:20:49,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 160 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 783 Invalid, 1 Unknown, 0 Unchecked, 5.6s Time] [2023-11-29 06:20:49,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-29 06:20:49,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2023-11-29 06:20:49,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1111111111111112) internal successors, (60), 54 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:20:49,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2023-11-29 06:20:49,768 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 33 [2023-11-29 06:20:49,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:20:49,769 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2023-11-29 06:20:49,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.4333333333333333) internal successors, (86), 60 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:20:49,769 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2023-11-29 06:20:49,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-29 06:20:49,769 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:20:49,769 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:20:49,774 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 06:20:49,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 06:20:49,970 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:20:49,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:20:49,970 INFO L85 PathProgramCache]: Analyzing trace with hash -968211442, now seen corresponding path program 10 times [2023-11-29 06:20:49,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:20:49,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946071545] [2023-11-29 06:20:49,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:49,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:20:49,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:20:50,158 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 15 proven. 28 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-29 06:20:50,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:20:50,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946071545] [2023-11-29 06:20:50,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946071545] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:20:50,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919067877] [2023-11-29 06:20:50,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:20:50,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:50,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:20:50,160 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:20:50,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 06:20:50,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:20:50,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:20:50,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-29 06:20:50,264 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:20:50,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-29 06:20:50,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2023-11-29 06:20:50,311 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2023-11-29 06:20:50,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2023-11-29 06:20:50,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2023-11-29 06:20:50,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2023-11-29 06:20:50,608 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-29 06:20:50,608 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:20:51,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 91 [2023-11-29 06:20:51,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 87 [2023-11-29 06:20:51,155 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:20:51,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1727250422 treesize of output 1702084598 [2023-11-29 06:20:51,856 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-29 06:20:51,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919067877] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:20:51,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:20:51,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 41 [2023-11-29 06:20:51,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843468366] [2023-11-29 06:20:51,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:20:51,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-29 06:20:51,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:20:51,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-29 06:20:51,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1474, Unknown=0, NotChecked=0, Total=1640 [2023-11-29 06:20:51,858 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand has 41 states, 41 states have (on average 1.7073170731707317) internal successors, (70), 41 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:20:53,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:20:53,089 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2023-11-29 06:20:53,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-29 06:20:53,090 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7073170731707317) internal successors, (70), 41 states have internal predecessors, (70), 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 35 [2023-11-29 06:20:53,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:20:53,091 INFO L225 Difference]: With dead ends: 79 [2023-11-29 06:20:53,091 INFO L226 Difference]: Without dead ends: 62 [2023-11-29 06:20:53,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 973 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=497, Invalid=3535, Unknown=0, NotChecked=0, Total=4032 [2023-11-29 06:20:53,093 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 143 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 871 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 06:20:53,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 269 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 871 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 06:20:53,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-29 06:20:53,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2023-11-29 06:20:53,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 53 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:20:53,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2023-11-29 06:20:53,117 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 35 [2023-11-29 06:20:53,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:20:53,117 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2023-11-29 06:20:53,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7073170731707317) internal successors, (70), 41 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:20:53,117 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2023-11-29 06:20:53,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-29 06:20:53,117 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:20:53,117 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:20:53,122 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 06:20:53,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 06:20:53,318 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:20:53,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:20:53,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1985988869, now seen corresponding path program 11 times [2023-11-29 06:20:53,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:20:53,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559218333] [2023-11-29 06:20:53,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:53,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:20:53,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:20:53,561 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 06:20:53,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:20:53,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559218333] [2023-11-29 06:20:53,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559218333] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:20:53,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755847058] [2023-11-29 06:20:53,561 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:20:53,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:53,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:20:53,562 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:20:53,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 06:20:53,726 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-29 06:20:53,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:20:53,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 06:20:53,730 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:20:53,886 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 06:20:53,886 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:20:54,001 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 06:20:54,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755847058] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:20:54,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:20:54,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2023-11-29 06:20:54,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723037937] [2023-11-29 06:20:54,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:20:54,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 06:20:54,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:20:54,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 06:20:54,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2023-11-29 06:20:54,002 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:20:54,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:20:54,335 INFO L93 Difference]: Finished difference Result 142 states and 151 transitions. [2023-11-29 06:20:54,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 06:20:54,336 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 states have internal predecessors, (41), 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 35 [2023-11-29 06:20:54,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:20:54,337 INFO L225 Difference]: With dead ends: 142 [2023-11-29 06:20:54,337 INFO L226 Difference]: Without dead ends: 117 [2023-11-29 06:20:54,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 45 SyntacticMatches, 15 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=478, Invalid=1502, Unknown=0, NotChecked=0, Total=1980 [2023-11-29 06:20:54,338 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 166 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:20:54,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 144 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:20:54,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-11-29 06:20:54,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2023-11-29 06:20:54,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.103448275862069) internal successors, (96), 87 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:20:54,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2023-11-29 06:20:54,403 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 35 [2023-11-29 06:20:54,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:20:54,403 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2023-11-29 06:20:54,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:20:54,404 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2023-11-29 06:20:54,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-29 06:20:54,404 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:20:54,404 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:20:54,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 06:20:54,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 06:20:54,605 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:20:54,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:20:54,605 INFO L85 PathProgramCache]: Analyzing trace with hash 264708838, now seen corresponding path program 12 times [2023-11-29 06:20:54,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:20:54,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258715231] [2023-11-29 06:20:54,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:54,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:20:54,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:20:56,088 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 3 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:20:56,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:20:56,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258715231] [2023-11-29 06:20:56,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258715231] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:20:56,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425197014] [2023-11-29 06:20:56,088 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:20:56,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:56,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:20:56,089 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:20:56,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 06:20:56,271 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-29 06:20:56,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:20:56,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 101 conjunts are in the unsatisfiable core [2023-11-29 06:20:56,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:20:56,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:20:56,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:20:56,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:20:56,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:20:56,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:20:56,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:20:56,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:20:56,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:20:56,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:20:56,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:20:56,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:20:56,769 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-11-29 06:20:56,831 INFO L349 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2023-11-29 06:20:56,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2023-11-29 06:20:56,907 INFO L349 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-11-29 06:20:56,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 30 [2023-11-29 06:20:56,976 INFO L349 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2023-11-29 06:20:56,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 33 [2023-11-29 06:20:57,058 INFO L349 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2023-11-29 06:20:57,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 33 [2023-11-29 06:20:57,133 INFO L349 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2023-11-29 06:20:57,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 33 [2023-11-29 06:20:57,215 INFO L349 Elim1Store]: treesize reduction 27, result has 28.9 percent of original size [2023-11-29 06:20:57,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 33 [2023-11-29 06:21:05,957 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:21:05,958 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:21:07,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 152 [2023-11-29 06:21:08,470 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:21:08,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2340421612 treesize of output 2338848748 [2023-11-29 06:21:15,894 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:21:15,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425197014] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:21:15,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:21:15,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28, 30] total 79 [2023-11-29 06:21:15,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264398017] [2023-11-29 06:21:15,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:21:15,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2023-11-29 06:21:15,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:15,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2023-11-29 06:21:15,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=557, Invalid=5602, Unknown=3, NotChecked=0, Total=6162 [2023-11-29 06:21:15,897 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand has 79 states, 79 states have (on average 1.2531645569620253) internal successors, (99), 79 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:27,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:21:27,934 INFO L93 Difference]: Finished difference Result 200 states and 220 transitions. [2023-11-29 06:21:27,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-11-29 06:21:27,935 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.2531645569620253) internal successors, (99), 79 states have internal predecessors, (99), 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 36 [2023-11-29 06:21:27,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:21:27,937 INFO L225 Difference]: With dead ends: 200 [2023-11-29 06:21:27,937 INFO L226 Difference]: Without dead ends: 182 [2023-11-29 06:21:27,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4631 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=2908, Invalid=15995, Unknown=3, NotChecked=0, Total=18906 [2023-11-29 06:21:27,939 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 347 mSDsluCounter, 769 mSDsCounter, 0 mSdLazyCounter, 2725 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 800 SdHoareTripleChecker+Invalid, 2913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 2725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:21:27,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 800 Invalid, 2913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 2725 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-11-29 06:21:27,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2023-11-29 06:21:28,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 123. [2023-11-29 06:21:28,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.1311475409836065) internal successors, (138), 122 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:28,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 138 transitions. [2023-11-29 06:21:28,020 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 138 transitions. Word has length 36 [2023-11-29 06:21:28,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:21:28,021 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 138 transitions. [2023-11-29 06:21:28,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.2531645569620253) internal successors, (99), 79 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:28,021 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 138 transitions. [2023-11-29 06:21:28,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-29 06:21:28,022 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:21:28,022 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:21:28,027 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 06:21:28,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:21:28,222 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:21:28,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:28,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1555364571, now seen corresponding path program 13 times [2023-11-29 06:21:28,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:28,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757128154] [2023-11-29 06:21:28,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:28,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:28,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:28,581 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 28 proven. 53 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 06:21:28,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:28,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757128154] [2023-11-29 06:21:28,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757128154] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:21:28,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670892844] [2023-11-29 06:21:28,582 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 06:21:28,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:21:28,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:21:28,583 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:21:28,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 06:21:28,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:28,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 06:21:28,682 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:21:28,978 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 06:21:28,978 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:21:29,277 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 06:21:29,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670892844] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:21:29,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:21:29,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2023-11-29 06:21:29,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462162065] [2023-11-29 06:21:29,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:21:29,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-29 06:21:29,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:29,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-29 06:21:29,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2023-11-29 06:21:29,279 INFO L87 Difference]: Start difference. First operand 123 states and 138 transitions. Second operand has 32 states, 32 states have (on average 1.375) internal successors, (44), 32 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:30,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:21:30,143 INFO L93 Difference]: Finished difference Result 247 states and 267 transitions. [2023-11-29 06:21:30,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-29 06:21:30,144 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.375) internal successors, (44), 32 states have internal predecessors, (44), 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 37 [2023-11-29 06:21:30,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:21:30,145 INFO L225 Difference]: With dead ends: 247 [2023-11-29 06:21:30,145 INFO L226 Difference]: Without dead ends: 191 [2023-11-29 06:21:30,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 45 SyntacticMatches, 18 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=538, Invalid=1912, Unknown=0, NotChecked=0, Total=2450 [2023-11-29 06:21:30,146 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 145 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 06:21:30,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 249 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 06:21:30,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2023-11-29 06:21:30,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 124. [2023-11-29 06:21:30,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.113821138211382) internal successors, (137), 123 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:30,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 137 transitions. [2023-11-29 06:21:30,230 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 137 transitions. Word has length 37 [2023-11-29 06:21:30,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:21:30,230 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 137 transitions. [2023-11-29 06:21:30,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.375) internal successors, (44), 32 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:30,231 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 137 transitions. [2023-11-29 06:21:30,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-29 06:21:30,231 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:21:30,231 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:21:30,235 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 06:21:30,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:21:30,432 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:21:30,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:30,432 INFO L85 PathProgramCache]: Analyzing trace with hash 359168760, now seen corresponding path program 14 times [2023-11-29 06:21:30,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:30,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136627010] [2023-11-29 06:21:30,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:30,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:30,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:32,083 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 21 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:21:32,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:32,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136627010] [2023-11-29 06:21:32,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136627010] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:21:32,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913192486] [2023-11-29 06:21:32,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:21:32,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:21:32,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:21:32,085 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:21:32,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 06:21:32,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:21:32,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:21:32,204 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 97 conjunts are in the unsatisfiable core [2023-11-29 06:21:32,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:21:32,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:21:32,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:21:32,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:21:32,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:21:32,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:21:32,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:21:32,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:21:32,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:21:32,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:21:32,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:21:32,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:21:33,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-29 06:21:33,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-29 06:21:33,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-29 06:21:33,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:21:33,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:21:33,267 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:21:33,267 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2023-11-29 06:21:33,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:21:33,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:21:33,352 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:21:33,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2023-11-29 06:21:33,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:21:33,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:21:33,437 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:21:33,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2023-11-29 06:21:33,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:21:33,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:21:33,546 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:21:33,546 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2023-11-29 06:21:33,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:21:33,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:21:33,628 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:21:33,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2023-11-29 06:21:34,163 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 10 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:21:34,163 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:21:38,778 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_422| Int) (|v_ULTIMATE.start_main_~i~0#1_421| Int) (v_ArrVal_1057 Int) (v_ArrVal_1058 Int) (v_ArrVal_1060 Int)) (or (= c_~N~0 (select (store (store (store (select |c_#memory_int#2| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1057) (+ (* |v_ULTIMATE.start_main_~i~0#1_422| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1058) (+ (* |v_ULTIMATE.start_main_~i~0#1_421| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1060) (+ 12 |c_ULTIMATE.start_main_~a~0#1.offset|))) (< |v_ULTIMATE.start_main_~i~0#1_421| (+ |v_ULTIMATE.start_main_~i~0#1_422| 1)) (< |v_ULTIMATE.start_main_~i~0#1_422| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) is different from false [2023-11-29 06:21:42,810 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_422| Int) (|v_ULTIMATE.start_main_~i~0#1_421| Int) (|v_ULTIMATE.start_main_~i~0#1_423| Int) (v_ArrVal_1055 Int) (v_ArrVal_1057 Int) (v_ArrVal_1058 Int) (v_ArrVal_1060 Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_421| (+ |v_ULTIMATE.start_main_~i~0#1_422| 1)) (= c_~N~0 (select (store (store (store (store (select |c_#memory_int#2| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1055) (+ (* |v_ULTIMATE.start_main_~i~0#1_423| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1057) (+ (* |v_ULTIMATE.start_main_~i~0#1_422| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1058) (+ (* |v_ULTIMATE.start_main_~i~0#1_421| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1060) (+ 12 |c_ULTIMATE.start_main_~a~0#1.offset|))) (< |v_ULTIMATE.start_main_~i~0#1_422| (+ |v_ULTIMATE.start_main_~i~0#1_423| 1)) (< |v_ULTIMATE.start_main_~i~0#1_423| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) is different from false [2023-11-29 06:21:46,845 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_422| Int) (|v_ULTIMATE.start_main_~i~0#1_421| Int) (|v_ULTIMATE.start_main_~i~0#1_424| Int) (v_ArrVal_1052 Int) (|v_ULTIMATE.start_main_~i~0#1_423| Int) (v_ArrVal_1055 Int) (v_ArrVal_1057 Int) (v_ArrVal_1058 Int) (v_ArrVal_1060 Int)) (or (= c_~N~0 (select (store (store (store (store (store (select |c_#memory_int#2| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1052) (+ (* |v_ULTIMATE.start_main_~i~0#1_424| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1055) (+ (* |v_ULTIMATE.start_main_~i~0#1_423| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1057) (+ (* |v_ULTIMATE.start_main_~i~0#1_422| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1058) (+ (* |v_ULTIMATE.start_main_~i~0#1_421| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1060) (+ 12 |c_ULTIMATE.start_main_~a~0#1.offset|))) (< |v_ULTIMATE.start_main_~i~0#1_421| (+ |v_ULTIMATE.start_main_~i~0#1_422| 1)) (< |v_ULTIMATE.start_main_~i~0#1_423| (+ |v_ULTIMATE.start_main_~i~0#1_424| 1)) (< |v_ULTIMATE.start_main_~i~0#1_422| (+ |v_ULTIMATE.start_main_~i~0#1_423| 1)) (< |v_ULTIMATE.start_main_~i~0#1_424| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) is different from false [2023-11-29 06:24:32,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 81 [2023-11-29 06:24:32,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3428342 treesize of output 3426294 [2023-11-29 06:24:34,151 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 36 trivial. 24 not checked. [2023-11-29 06:24:34,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913192486] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:24:34,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:24:34,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 20] total 71 [2023-11-29 06:24:34,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171966538] [2023-11-29 06:24:34,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:24:34,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-11-29 06:24:34,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:24:34,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-11-29 06:24:34,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=512, Invalid=4024, Unknown=32, NotChecked=402, Total=4970 [2023-11-29 06:24:34,154 INFO L87 Difference]: Start difference. First operand 124 states and 137 transitions. Second operand has 71 states, 71 states have (on average 1.3661971830985915) internal successors, (97), 71 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:25:00,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.86s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:25:02,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.31s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:25:04,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:25:07,100 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.91s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:25:09,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.55s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:25:12,334 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.68s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:25:14,612 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.28s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:25:16,653 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:25:19,007 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.35s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:25:21,316 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.28s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:25:25,318 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:25:30,004 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:25:32,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:25:36,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:25:38,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:25:59,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:26:01,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.28s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:26:03,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.44s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:26:06,643 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.79s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:26:09,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.44s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:26:11,036 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:26:13,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:26:15,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.30s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:26:45,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:26:49,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:26:53,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:26:55,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:26:59,091 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:27:03,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:27:07,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:27:11,125 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:27:15,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:27:17,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.44s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:27:21,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:27:23,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.24s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:27:26,903 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.98s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:27:29,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.66s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:28:25,173 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:28:29,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:28:33,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:28:37,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:28:41,188 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:28:45,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:28:49,195 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:28:52,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.28s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:28:55,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:28:58,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.95s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:29:01,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:29:04,964 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.35s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:29:09,056 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:29:13,061 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:29:17,064 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:29:21,071 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:29:25,074 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:29:29,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:29:33,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:29:37,135 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:29:41,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:29:45,143 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:29:49,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:29:52,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.89s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:29:55,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.38s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:29:59,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:30:03,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:30:07,423 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:30:11,432 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int#2| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse1 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse4 (select (select |c_#memory_int#3| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse2 (+ 12 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse3 (+ |c_ULTIMATE.start_main_~i~0#1| 1))) (and (or (< |c_ULTIMATE.start_main_~i~0#1| c_~N~0) (= c_~N~0 (select .cse0 12))) (forall ((|v_ULTIMATE.start_main_~i~0#1_422| Int) (|v_ULTIMATE.start_main_~i~0#1_421| Int) (|v_ULTIMATE.start_main_~i~0#1_424| Int) (v_ArrVal_1052 Int) (|v_ULTIMATE.start_main_~i~0#1_423| Int) (v_ArrVal_1055 Int) (v_ArrVal_1057 Int) (v_ArrVal_1058 Int) (v_ArrVal_1060 Int)) (or (= c_~N~0 (select (store (store (store (store (store .cse0 .cse1 v_ArrVal_1052) (+ (* |v_ULTIMATE.start_main_~i~0#1_424| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1055) (+ (* |v_ULTIMATE.start_main_~i~0#1_423| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1057) (+ (* |v_ULTIMATE.start_main_~i~0#1_422| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1058) (+ (* |v_ULTIMATE.start_main_~i~0#1_421| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1060) .cse2)) (< |v_ULTIMATE.start_main_~i~0#1_421| (+ |v_ULTIMATE.start_main_~i~0#1_422| 1)) (< |v_ULTIMATE.start_main_~i~0#1_423| (+ |v_ULTIMATE.start_main_~i~0#1_424| 1)) (< |v_ULTIMATE.start_main_~i~0#1_422| (+ |v_ULTIMATE.start_main_~i~0#1_423| 1)) (< |v_ULTIMATE.start_main_~i~0#1_424| .cse3))) (= .cse4 c_~N~0) (forall ((|v_ULTIMATE.start_main_~i~0#1_422| Int) (|v_ULTIMATE.start_main_~i~0#1_421| Int) (|v_ULTIMATE.start_main_~i~0#1_423| Int) (v_ArrVal_1055 Int) (v_ArrVal_1057 Int) (v_ArrVal_1058 Int) (v_ArrVal_1060 Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_421| (+ |v_ULTIMATE.start_main_~i~0#1_422| 1)) (= c_~N~0 (select (store (store (store (store .cse0 .cse1 v_ArrVal_1055) (+ (* |v_ULTIMATE.start_main_~i~0#1_423| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1057) (+ (* |v_ULTIMATE.start_main_~i~0#1_422| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1058) (+ (* |v_ULTIMATE.start_main_~i~0#1_421| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1060) .cse2)) (< |v_ULTIMATE.start_main_~i~0#1_422| (+ |v_ULTIMATE.start_main_~i~0#1_423| 1)) (< |v_ULTIMATE.start_main_~i~0#1_423| .cse3))) (forall ((|v_ULTIMATE.start_main_~i~0#1_422| Int) (|v_ULTIMATE.start_main_~i~0#1_421| Int) (|v_ULTIMATE.start_main_~i~0#1_424| Int) (v_ArrVal_1052 Int) (|v_ULTIMATE.start_main_~i~0#1_423| Int) (v_ArrVal_1055 Int) (v_ArrVal_1057 Int) (v_ArrVal_1058 Int) (|v_ULTIMATE.start_main_~i~0#1_425| Int) (v_ArrVal_1060 Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_424| (+ |v_ULTIMATE.start_main_~i~0#1_425| 1)) (= c_~N~0 (select (store (store (store (store (store (store .cse0 .cse1 .cse4) (+ (* |v_ULTIMATE.start_main_~i~0#1_425| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1052) (+ (* |v_ULTIMATE.start_main_~i~0#1_424| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1055) (+ (* |v_ULTIMATE.start_main_~i~0#1_423| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1057) (+ (* |v_ULTIMATE.start_main_~i~0#1_422| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1058) (+ (* |v_ULTIMATE.start_main_~i~0#1_421| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1060) .cse2)) (< |v_ULTIMATE.start_main_~i~0#1_421| (+ |v_ULTIMATE.start_main_~i~0#1_422| 1)) (< |v_ULTIMATE.start_main_~i~0#1_425| .cse3) (< |v_ULTIMATE.start_main_~i~0#1_423| (+ |v_ULTIMATE.start_main_~i~0#1_424| 1)) (< |v_ULTIMATE.start_main_~i~0#1_422| (+ |v_ULTIMATE.start_main_~i~0#1_423| 1)))) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0))) is different from false [2023-11-29 06:30:15,478 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int#2| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse1 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse2 (+ 12 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse3 (+ |c_ULTIMATE.start_main_~i~0#1| 1))) (and (forall ((|v_ULTIMATE.start_main_~i~0#1_422| Int) (|v_ULTIMATE.start_main_~i~0#1_421| Int) (v_ArrVal_1057 Int) (v_ArrVal_1058 Int) (v_ArrVal_1060 Int)) (or (= c_~N~0 (select (store (store (store .cse0 .cse1 v_ArrVal_1057) (+ (* |v_ULTIMATE.start_main_~i~0#1_422| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1058) (+ (* |v_ULTIMATE.start_main_~i~0#1_421| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1060) .cse2)) (< |v_ULTIMATE.start_main_~i~0#1_421| (+ |v_ULTIMATE.start_main_~i~0#1_422| 1)) (< |v_ULTIMATE.start_main_~i~0#1_422| .cse3))) (forall ((|v_ULTIMATE.start_main_~i~0#1_422| Int) (|v_ULTIMATE.start_main_~i~0#1_421| Int) (|v_ULTIMATE.start_main_~i~0#1_424| Int) (v_ArrVal_1052 Int) (|v_ULTIMATE.start_main_~i~0#1_423| Int) (v_ArrVal_1055 Int) (v_ArrVal_1057 Int) (v_ArrVal_1058 Int) (v_ArrVal_1060 Int)) (or (= c_~N~0 (select (store (store (store (store (store .cse0 .cse1 v_ArrVal_1052) (+ (* |v_ULTIMATE.start_main_~i~0#1_424| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1055) (+ (* |v_ULTIMATE.start_main_~i~0#1_423| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1057) (+ (* |v_ULTIMATE.start_main_~i~0#1_422| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1058) (+ (* |v_ULTIMATE.start_main_~i~0#1_421| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1060) .cse2)) (< |v_ULTIMATE.start_main_~i~0#1_421| (+ |v_ULTIMATE.start_main_~i~0#1_422| 1)) (< |v_ULTIMATE.start_main_~i~0#1_423| (+ |v_ULTIMATE.start_main_~i~0#1_424| 1)) (< |v_ULTIMATE.start_main_~i~0#1_422| (+ |v_ULTIMATE.start_main_~i~0#1_423| 1)) (< |v_ULTIMATE.start_main_~i~0#1_424| .cse3))) (forall ((|v_ULTIMATE.start_main_~i~0#1_422| Int) (|v_ULTIMATE.start_main_~i~0#1_421| Int) (|v_ULTIMATE.start_main_~i~0#1_423| Int) (v_ArrVal_1055 Int) (v_ArrVal_1057 Int) (v_ArrVal_1058 Int) (v_ArrVal_1060 Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_421| (+ |v_ULTIMATE.start_main_~i~0#1_422| 1)) (= c_~N~0 (select (store (store (store (store .cse0 .cse1 v_ArrVal_1055) (+ (* |v_ULTIMATE.start_main_~i~0#1_423| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1057) (+ (* |v_ULTIMATE.start_main_~i~0#1_422| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1058) (+ (* |v_ULTIMATE.start_main_~i~0#1_421| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1060) .cse2)) (< |v_ULTIMATE.start_main_~i~0#1_422| (+ |v_ULTIMATE.start_main_~i~0#1_423| 1)) (< |v_ULTIMATE.start_main_~i~0#1_423| .cse3))))) is different from false [2023-11-29 06:30:23,318 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.45s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:30:54,764 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:30:56,371 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:30:57,651 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:30:58,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:31:43,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:31:45,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:31:45,062 INFO L93 Difference]: Finished difference Result 201 states and 217 transitions. [2023-11-29 06:31:45,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2023-11-29 06:31:45,063 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.3661971830985915) internal successors, (97), 71 states have internal predecessors, (97), 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 38 [2023-11-29 06:31:45,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:31:45,064 INFO L225 Difference]: With dead ends: 201 [2023-11-29 06:31:45,064 INFO L226 Difference]: Without dead ends: 178 [2023-11-29 06:31:45,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 135 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 5810 ImplicationChecksByTransitivity, 385.6s TimeCoverageRelationStatistics Valid=1852, Invalid=15388, Unknown=72, NotChecked=1320, Total=18632 [2023-11-29 06:31:45,067 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 239 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 1631 mSolverCounterSat, 79 mSolverCounterUnsat, 71 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 225.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 2331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1631 IncrementalHoareTripleChecker+Invalid, 71 IncrementalHoareTripleChecker+Unknown, 550 IncrementalHoareTripleChecker+Unchecked, 225.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:31:45,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 546 Invalid, 2331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1631 Invalid, 71 Unknown, 550 Unchecked, 225.3s Time] [2023-11-29 06:31:45,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2023-11-29 06:31:45,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 151. [2023-11-29 06:31:45,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.0933333333333333) internal successors, (164), 150 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:45,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 164 transitions. [2023-11-29 06:31:45,172 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 164 transitions. Word has length 38 [2023-11-29 06:31:45,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:31:45,172 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 164 transitions. [2023-11-29 06:31:45,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.3661971830985915) internal successors, (97), 71 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:45,172 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 164 transitions. [2023-11-29 06:31:45,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-29 06:31:45,173 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:31:45,173 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:31:45,178 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 06:31:45,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-29 06:31:45,374 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:31:45,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:31:45,374 INFO L85 PathProgramCache]: Analyzing trace with hash 585198885, now seen corresponding path program 15 times [2023-11-29 06:31:45,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:31:45,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556972307] [2023-11-29 06:31:45,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:31:45,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:31:45,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:31:45,673 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 06:31:45,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:31:45,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556972307] [2023-11-29 06:31:45,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556972307] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:31:45,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229550593] [2023-11-29 06:31:45,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:31:45,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:31:45,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:31:45,674 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:31:45,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 06:31:45,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-29 06:31:45,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:31:45,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 06:31:45,917 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:31:46,142 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 06:31:46,142 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:31:46,366 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 06:31:46,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229550593] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:31:46,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:31:46,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-11-29 06:31:46,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197371334] [2023-11-29 06:31:46,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:31:46,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 06:31:46,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:31:46,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 06:31:46,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2023-11-29 06:31:46,368 INFO L87 Difference]: Start difference. First operand 151 states and 164 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:46,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:31:46,862 INFO L93 Difference]: Finished difference Result 180 states and 195 transitions. [2023-11-29 06:31:46,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 06:31:46,863 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 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 39 [2023-11-29 06:31:46,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:31:46,864 INFO L225 Difference]: With dead ends: 180 [2023-11-29 06:31:46,864 INFO L226 Difference]: Without dead ends: 160 [2023-11-29 06:31:46,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 55 SyntacticMatches, 14 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=276, Invalid=846, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 06:31:46,865 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 114 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:31:46,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 79 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 06:31:46,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-11-29 06:31:46,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 136. [2023-11-29 06:31:46,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.0888888888888888) internal successors, (147), 135 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:46,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 147 transitions. [2023-11-29 06:31:46,958 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 147 transitions. Word has length 39 [2023-11-29 06:31:46,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:31:46,958 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 147 transitions. [2023-11-29 06:31:46,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:46,958 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 147 transitions. [2023-11-29 06:31:46,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-29 06:31:46,959 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:31:46,959 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:31:46,965 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 06:31:47,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-29 06:31:47,159 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:31:47,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:31:47,160 INFO L85 PathProgramCache]: Analyzing trace with hash 37000632, now seen corresponding path program 16 times [2023-11-29 06:31:47,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:31:47,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848704430] [2023-11-29 06:31:47,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:31:47,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:31:47,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:31:48,648 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:31:48,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:31:48,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848704430] [2023-11-29 06:31:48,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848704430] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:31:48,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798137229] [2023-11-29 06:31:48,649 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:31:48,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:31:48,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:31:48,650 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:31:48,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 06:31:48,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:31:48,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:31:48,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-29 06:31:48,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:31:48,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-29 06:31:48,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2023-11-29 06:31:48,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2023-11-29 06:31:48,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2023-11-29 06:31:49,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2023-11-29 06:31:49,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2023-11-29 06:31:49,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2023-11-29 06:31:49,199 INFO L349 Elim1Store]: treesize reduction 50, result has 25.4 percent of original size [2023-11-29 06:31:49,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 20 [2023-11-29 06:31:50,160 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-29 06:31:50,160 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:31:58,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 121 [2023-11-29 06:31:58,182 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 117 [2023-11-29 06:31:58,617 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:31:58,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1848270389238 treesize of output 1841827938294 [2023-11-29 06:32:02,778 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 67 refuted. 1 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-29 06:32:02,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798137229] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:32:02,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:32:02,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 19, 19] total 57 [2023-11-29 06:32:02,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135920280] [2023-11-29 06:32:02,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:32:02,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-11-29 06:32:02,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:32:02,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-11-29 06:32:02,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=3009, Unknown=2, NotChecked=0, Total=3192 [2023-11-29 06:32:02,780 INFO L87 Difference]: Start difference. First operand 136 states and 147 transitions. Second operand has 57 states, 57 states have (on average 1.6491228070175439) internal successors, (94), 57 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:05,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:32:05,981 INFO L93 Difference]: Finished difference Result 173 states and 186 transitions. [2023-11-29 06:32:05,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-11-29 06:32:05,982 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.6491228070175439) internal successors, (94), 57 states have internal predecessors, (94), 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 06:32:05,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:32:05,983 INFO L225 Difference]: With dead ends: 173 [2023-11-29 06:32:05,983 INFO L226 Difference]: Without dead ends: 171 [2023-11-29 06:32:05,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1165 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=518, Invalid=6452, Unknown=2, NotChecked=0, Total=6972 [2023-11-29 06:32:05,984 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 158 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 1211 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 1278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:32:05,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 265 Invalid, 1278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1211 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-29 06:32:05,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2023-11-29 06:32:06,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 145. [2023-11-29 06:32:06,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0763888888888888) internal successors, (155), 144 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:06,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 155 transitions. [2023-11-29 06:32:06,097 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 155 transitions. Word has length 40 [2023-11-29 06:32:06,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:32:06,098 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 155 transitions. [2023-11-29 06:32:06,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.6491228070175439) internal successors, (94), 57 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:06,098 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 155 transitions. [2023-11-29 06:32:06,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-29 06:32:06,098 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:32:06,098 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:32:06,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-29 06:32:06,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-29 06:32:06,299 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:32:06,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:32:06,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1515533778, now seen corresponding path program 17 times [2023-11-29 06:32:06,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:32:06,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127914514] [2023-11-29 06:32:06,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:32:06,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:32:06,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:32:07,731 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:32:07,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:32:07,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127914514] [2023-11-29 06:32:07,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127914514] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:32:07,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866386878] [2023-11-29 06:32:07,731 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:32:07,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:32:07,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:32:07,732 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:32:07,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 06:32:07,968 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-11-29 06:32:07,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:32:07,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 66 conjunts are in the unsatisfiable core [2023-11-29 06:32:07,974 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:32:08,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2023-11-29 06:32:08,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2023-11-29 06:32:08,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2023-11-29 06:32:08,253 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:32:08,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 33 [2023-11-29 06:32:08,330 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:32:08,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 33 [2023-11-29 06:32:08,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2023-11-29 06:32:08,405 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:32:08,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 31 [2023-11-29 06:32:09,778 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-29 06:32:09,779 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:32:11,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 109 [2023-11-29 06:32:11,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 105 [2023-11-29 06:32:11,825 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:32:11,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51936526326 treesize of output 51399655414 [2023-11-29 06:32:12,491 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-29 06:32:12,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866386878] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:32:12,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:32:12,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 21, 21] total 62 [2023-11-29 06:32:12,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42926588] [2023-11-29 06:32:12,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:32:12,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-11-29 06:32:12,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:32:12,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-11-29 06:32:12,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=3561, Unknown=0, NotChecked=0, Total=3782 [2023-11-29 06:32:12,493 INFO L87 Difference]: Start difference. First operand 145 states and 155 transitions. Second operand has 62 states, 62 states have (on average 1.6612903225806452) internal successors, (103), 62 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:23,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:32:23,436 INFO L93 Difference]: Finished difference Result 333 states and 361 transitions. [2023-11-29 06:32:23,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-11-29 06:32:23,436 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.6612903225806452) internal successors, (103), 62 states have internal predecessors, (103), 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 43 [2023-11-29 06:32:23,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:32:23,438 INFO L225 Difference]: With dead ends: 333 [2023-11-29 06:32:23,438 INFO L226 Difference]: Without dead ends: 280 [2023-11-29 06:32:23,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3933 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=1290, Invalid=15222, Unknown=0, NotChecked=0, Total=16512 [2023-11-29 06:32:23,439 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 272 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 1647 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 1741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-29 06:32:23,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 328 Invalid, 1741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1647 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-29 06:32:23,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2023-11-29 06:32:23,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 155. [2023-11-29 06:32:23,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.1168831168831168) internal successors, (172), 154 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:23,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 172 transitions. [2023-11-29 06:32:23,563 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 172 transitions. Word has length 43 [2023-11-29 06:32:23,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:32:23,563 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 172 transitions. [2023-11-29 06:32:23,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.6612903225806452) internal successors, (103), 62 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:23,563 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 172 transitions. [2023-11-29 06:32:23,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-29 06:32:23,563 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:32:23,564 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:32:23,568 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 06:32:23,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:32:23,764 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:32:23,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:32:23,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1715267174, now seen corresponding path program 18 times [2023-11-29 06:32:23,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:32:23,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528937219] [2023-11-29 06:32:23,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:32:23,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:32:23,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:32:25,240 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:32:25,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:32:25,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528937219] [2023-11-29 06:32:25,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528937219] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:32:25,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386194814] [2023-11-29 06:32:25,241 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:32:25,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:32:25,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:32:25,242 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:32:25,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 06:32:25,619 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-11-29 06:32:25,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:32:25,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 102 conjunts are in the unsatisfiable core [2023-11-29 06:32:25,627 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:32:25,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:32:25,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:32:25,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:32:25,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:32:25,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:32:25,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:32:26,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:32:26,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:32:26,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:32:26,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:32:26,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-29 06:32:26,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-29 06:32:26,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-29 06:32:26,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:32:26,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:32:26,778 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:32:26,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2023-11-29 06:32:26,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:32:26,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:32:26,889 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:32:26,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 21 [2023-11-29 06:32:27,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:32:27,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:32:27,011 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:32:27,011 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2023-11-29 06:32:27,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:32:27,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:32:27,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:32:27,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:32:27,147 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:32:27,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2023-11-29 06:32:29,188 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 11 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:32:29,188 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:32:45,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 263 treesize of output 257 [2023-11-29 06:32:45,877 INFO L349 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2023-11-29 06:32:45,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 307652373 treesize of output 307373845 [2023-11-29 06:32:51,601 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 49 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:32:51,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386194814] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:32:51,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:32:51,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 33, 34] total 93 [2023-11-29 06:32:51,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076639559] [2023-11-29 06:32:51,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:32:51,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2023-11-29 06:32:51,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:32:51,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2023-11-29 06:32:51,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1002, Invalid=7550, Unknown=4, NotChecked=0, Total=8556 [2023-11-29 06:32:51,604 INFO L87 Difference]: Start difference. First operand 155 states and 172 transitions. Second operand has 93 states, 93 states have (on average 1.4516129032258065) internal successors, (135), 93 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:12,898 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:33:21,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:33:21,385 INFO L93 Difference]: Finished difference Result 171 states and 187 transitions. [2023-11-29 06:33:21,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-11-29 06:33:21,385 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.4516129032258065) internal successors, (135), 93 states have internal predecessors, (135), 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 48 [2023-11-29 06:33:21,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:33:21,386 INFO L225 Difference]: With dead ends: 171 [2023-11-29 06:33:21,386 INFO L226 Difference]: Without dead ends: 103 [2023-11-29 06:33:21,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5928 ImplicationChecksByTransitivity, 44.3s TimeCoverageRelationStatistics Valid=3447, Invalid=20416, Unknown=7, NotChecked=0, Total=23870 [2023-11-29 06:33:21,387 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 204 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 1935 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 2115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2023-11-29 06:33:21,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 343 Invalid, 2115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1935 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2023-11-29 06:33:21,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-11-29 06:33:21,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 95. [2023-11-29 06:33:21,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.0957446808510638) internal successors, (103), 94 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:21,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 103 transitions. [2023-11-29 06:33:21,463 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 103 transitions. Word has length 48 [2023-11-29 06:33:21,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:33:21,463 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 103 transitions. [2023-11-29 06:33:21,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.4516129032258065) internal successors, (135), 93 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:21,464 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 103 transitions. [2023-11-29 06:33:21,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-29 06:33:21,464 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:33:21,464 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:33:21,469 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 06:33:21,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 06:33:21,665 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:33:21,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:33:21,665 INFO L85 PathProgramCache]: Analyzing trace with hash -774851720, now seen corresponding path program 19 times [2023-11-29 06:33:21,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:33:21,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980250981] [2023-11-29 06:33:21,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:33:21,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:33:21,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:33:23,293 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 21 proven. 146 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:33:23,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:33:23,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980250981] [2023-11-29 06:33:23,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980250981] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:33:23,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947566589] [2023-11-29 06:33:23,294 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 06:33:23,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:33:23,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:33:23,295 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:33:23,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c3c245-e14e-46b4-9b37-b5dade97d40e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 06:33:23,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:33:23,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 72 conjunts are in the unsatisfiable core [2023-11-29 06:33:23,436 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:33:23,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-29 06:33:23,653 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-29 06:33:23,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-29 06:33:23,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-29 06:33:23,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-29 06:33:23,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-29 06:33:24,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-29 06:33:24,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2023-11-29 06:33:24,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2023-11-29 06:33:24,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:33:24,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:33:24,233 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:33:24,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 18 [2023-11-29 06:33:25,303 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 06:33:25,304 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:33:45,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 153 [2023-11-29 06:33:45,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 149