./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/zero_sum_const1.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_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/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_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/zero_sum_const1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/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_4b26e434-c7b6-4c10-9a7a-398cd177bb20/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 be1a0182ecf6c8aa754e6086345670fff3439e7c706169309311fcaa402caa1e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 06:36:22,775 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 06:36:22,847 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 06:36:22,853 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 06:36:22,853 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 06:36:22,880 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 06:36:22,880 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 06:36:22,881 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 06:36:22,882 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 06:36:22,882 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 06:36:22,883 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 06:36:22,883 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 06:36:22,884 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 06:36:22,885 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 06:36:22,885 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 06:36:22,886 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 06:36:22,886 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 06:36:22,887 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 06:36:22,888 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 06:36:22,888 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 06:36:22,889 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 06:36:22,889 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 06:36:22,890 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 06:36:22,890 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 06:36:22,891 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 06:36:22,891 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 06:36:22,892 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 06:36:22,892 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 06:36:22,893 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 06:36:22,893 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 06:36:22,893 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 06:36:22,894 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:36:22,894 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 06:36:22,894 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 06:36:22,895 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 06:36:22,895 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 06:36:22,895 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 06:36:22,895 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 06:36:22,896 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 06:36:22,896 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 06:36:22,896 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 06:36:22,896 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 06:36:22,897 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_4b26e434-c7b6-4c10-9a7a-398cd177bb20/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be1a0182ecf6c8aa754e6086345670fff3439e7c706169309311fcaa402caa1e [2023-11-29 06:36:23,136 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 06:36:23,159 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 06:36:23,162 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 06:36:23,163 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 06:36:23,164 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 06:36:23,165 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/array-crafted/zero_sum_const1.c [2023-11-29 06:36:25,959 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 06:36:26,130 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 06:36:26,131 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/sv-benchmarks/c/array-crafted/zero_sum_const1.c [2023-11-29 06:36:26,138 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/data/1adf827f4/c11d210d2a84412580d9c7a656b085d2/FLAG3a90b928f [2023-11-29 06:36:26,153 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/data/1adf827f4/c11d210d2a84412580d9c7a656b085d2 [2023-11-29 06:36:26,156 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 06:36:26,157 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 06:36:26,159 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 06:36:26,159 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 06:36:26,164 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 06:36:26,165 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:36:26" (1/1) ... [2023-11-29 06:36:26,166 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e3f5632 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:36:26, skipping insertion in model container [2023-11-29 06:36:26,166 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:36:26" (1/1) ... [2023-11-29 06:36:26,187 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 06:36:26,339 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_4b26e434-c7b6-4c10-9a7a-398cd177bb20/sv-benchmarks/c/array-crafted/zero_sum_const1.c[406,419] [2023-11-29 06:36:26,357 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:36:26,366 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 06:36:26,376 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_4b26e434-c7b6-4c10-9a7a-398cd177bb20/sv-benchmarks/c/array-crafted/zero_sum_const1.c[406,419] [2023-11-29 06:36:26,382 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:36:26,394 INFO L206 MainTranslator]: Completed translation [2023-11-29 06:36:26,394 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:36:26 WrapperNode [2023-11-29 06:36:26,394 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 06:36:26,395 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 06:36:26,395 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 06:36:26,395 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 06:36:26,401 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:36:26" (1/1) ... [2023-11-29 06:36:26,406 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:36:26" (1/1) ... [2023-11-29 06:36:26,422 INFO L138 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 61 [2023-11-29 06:36:26,422 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 06:36:26,423 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 06:36:26,423 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 06:36:26,423 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 06:36:26,431 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:36:26" (1/1) ... [2023-11-29 06:36:26,431 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:36:26" (1/1) ... [2023-11-29 06:36:26,433 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:36:26" (1/1) ... [2023-11-29 06:36:26,447 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2023-11-29 06:36:26,447 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:36:26" (1/1) ... [2023-11-29 06:36:26,448 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:36:26" (1/1) ... [2023-11-29 06:36:26,453 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:36:26" (1/1) ... [2023-11-29 06:36:26,457 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:36:26" (1/1) ... [2023-11-29 06:36:26,458 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:36:26" (1/1) ... [2023-11-29 06:36:26,459 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:36:26" (1/1) ... [2023-11-29 06:36:26,461 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 06:36:26,462 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 06:36:26,462 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 06:36:26,462 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 06:36:26,463 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:36:26" (1/1) ... [2023-11-29 06:36:26,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:36:26,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:36:26,488 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 06:36:26,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 06:36:26,548 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 06:36:26,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 06:36:26,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 06:36:26,549 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 06:36:26,549 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 06:36:26,549 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 06:36:26,549 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 06:36:26,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 06:36:26,549 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 06:36:26,549 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 06:36:26,632 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 06:36:26,633 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 06:36:26,753 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 06:36:26,777 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 06:36:26,777 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-29 06:36:26,777 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:36:26 BoogieIcfgContainer [2023-11-29 06:36:26,777 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 06:36:26,780 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 06:36:26,781 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 06:36:26,784 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 06:36:26,784 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:36:26" (1/3) ... [2023-11-29 06:36:26,785 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@496c6224 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:36:26, skipping insertion in model container [2023-11-29 06:36:26,785 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:36:26" (2/3) ... [2023-11-29 06:36:26,785 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@496c6224 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:36:26, skipping insertion in model container [2023-11-29 06:36:26,786 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:36:26" (3/3) ... [2023-11-29 06:36:26,787 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum_const1.c [2023-11-29 06:36:26,803 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 06:36:26,803 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 06:36:26,840 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 06:36:26,845 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;@97b0a55, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 06:36:26,845 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 06:36:26,849 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 13 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 06:36:26,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-29 06:36:26,853 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:36:26,854 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:36:26,854 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:36:26,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:36:26,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1762294231, now seen corresponding path program 1 times [2023-11-29 06:36:26,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:36:26,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677149122] [2023-11-29 06:36:26,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:36:26,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:36:26,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:36:26,997 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 06:36:26,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:36:26,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677149122] [2023-11-29 06:36:26,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677149122] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:36:26,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:36:26,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:36:27,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237220656] [2023-11-29 06:36:27,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:36:27,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 06:36:27,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:36:27,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 06:36:27,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 06:36:27,036 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 13 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) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:27,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:36:27,061 INFO L93 Difference]: Finished difference Result 25 states and 36 transitions. [2023-11-29 06:36:27,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 06:36:27,063 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-29 06:36:27,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:36:27,071 INFO L225 Difference]: With dead ends: 25 [2023-11-29 06:36:27,071 INFO L226 Difference]: Without dead ends: 11 [2023-11-29 06:36:27,074 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 06:36:27,078 INFO L413 NwaCegarLoop]: 12 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, 12 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 06:36:27,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:36:27,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-11-29 06:36:27,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2023-11-29 06:36:27,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:27,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2023-11-29 06:36:27,102 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 10 [2023-11-29 06:36:27,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:36:27,103 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2023-11-29 06:36:27,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:27,103 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2023-11-29 06:36:27,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-29 06:36:27,104 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:36:27,104 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:36:27,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 06:36:27,105 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:36:27,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:36:27,106 INFO L85 PathProgramCache]: Analyzing trace with hash -104633187, now seen corresponding path program 1 times [2023-11-29 06:36:27,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:36:27,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854157321] [2023-11-29 06:36:27,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:36:27,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:36:27,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:36:27,212 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 06:36:27,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:36:27,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854157321] [2023-11-29 06:36:27,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854157321] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:36:27,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:36:27,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:36:27,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62195740] [2023-11-29 06:36:27,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:36:27,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:36:27,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:36:27,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:36:27,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:36:27,216 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:27,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:36:27,239 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2023-11-29 06:36:27,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:36:27,240 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-29 06:36:27,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:36:27,240 INFO L225 Difference]: With dead ends: 20 [2023-11-29 06:36:27,240 INFO L226 Difference]: Without dead ends: 12 [2023-11-29 06:36:27,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:36:27,243 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:36:27,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:36:27,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-11-29 06:36:27,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-11-29 06:36:27,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 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 06:36:27,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2023-11-29 06:36:27,248 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 10 [2023-11-29 06:36:27,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:36:27,248 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2023-11-29 06:36:27,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:27,249 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2023-11-29 06:36:27,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-29 06:36:27,249 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:36:27,249 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:36:27,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 06:36:27,250 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:36:27,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:36:27,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1270710908, now seen corresponding path program 1 times [2023-11-29 06:36:27,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:36:27,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3928222] [2023-11-29 06:36:27,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:36:27,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:36:27,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:36:27,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:36:27,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:36:27,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3928222] [2023-11-29 06:36:27,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3928222] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:36:27,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:36:27,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 06:36:27,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143600101] [2023-11-29 06:36:27,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:36:27,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:36:27,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:36:27,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:36:27,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:36:27,348 INFO L87 Difference]: Start difference. First operand 12 states and 14 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 06:36:27,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:36:27,377 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2023-11-29 06:36:27,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:36:27,377 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 06:36:27,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:36:27,378 INFO L225 Difference]: With dead ends: 20 [2023-11-29 06:36:27,378 INFO L226 Difference]: Without dead ends: 14 [2023-11-29 06:36:27,378 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 06:36:27,380 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 9 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:36:27,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 9 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:36:27,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-11-29 06:36:27,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-11-29 06:36:27,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 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 06:36:27,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2023-11-29 06:36:27,385 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2023-11-29 06:36:27,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:36:27,386 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2023-11-29 06:36:27,386 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 06:36:27,386 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2023-11-29 06:36:27,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-29 06:36:27,387 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:36:27,387 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:36:27,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 06:36:27,387 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:36:27,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:36:27,388 INFO L85 PathProgramCache]: Analyzing trace with hash -461020313, now seen corresponding path program 1 times [2023-11-29 06:36:27,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:36:27,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614933167] [2023-11-29 06:36:27,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:36:27,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:36:27,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:36:27,484 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 06:36:27,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:36:27,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614933167] [2023-11-29 06:36:27,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614933167] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:36:27,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85630122] [2023-11-29 06:36:27,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:36:27,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:36:27,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:36:27,490 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:36:27,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 06:36:27,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:36:27,563 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 06:36:27,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:36:27,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 06:36:27,626 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:36:27,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 06:36:27,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85630122] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:36:27,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:36:27,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-29 06:36:27,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276169083] [2023-11-29 06:36:27,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:36:27,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 06:36:27,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:36:27,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 06:36:27,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:36:27,655 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 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 06:36:27,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:36:27,683 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2023-11-29 06:36:27,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:36:27,683 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 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 06:36:27,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:36:27,684 INFO L225 Difference]: With dead ends: 25 [2023-11-29 06:36:27,684 INFO L226 Difference]: Without dead ends: 15 [2023-11-29 06:36:27,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:36:27,686 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:36:27,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:36:27,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-29 06:36:27,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-11-29 06:36:27,690 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 06:36:27,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2023-11-29 06:36:27,690 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 13 [2023-11-29 06:36:27,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:36:27,691 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2023-11-29 06:36:27,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 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 06:36:27,691 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2023-11-29 06:36:27,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-29 06:36:27,691 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:36:27,692 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:36:27,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 06:36:27,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:36:27,892 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:36:27,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:36:27,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1573090008, now seen corresponding path program 2 times [2023-11-29 06:36:27,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:36:27,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980690148] [2023-11-29 06:36:27,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:36:27,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:36:27,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:36:27,976 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 06:36:27,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:36:27,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980690148] [2023-11-29 06:36:27,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980690148] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:36:27,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570363265] [2023-11-29 06:36:27,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:36:27,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:36:27,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:36:27,979 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:36:27,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 06:36:28,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:36:28,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:36:28,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 06:36:28,065 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:36:28,109 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 06:36:28,109 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:36:28,140 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 06:36:28,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570363265] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:36:28,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:36:28,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-29 06:36:28,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367879740] [2023-11-29 06:36:28,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:36:28,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 06:36:28,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:36:28,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 06:36:28,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-11-29 06:36:28,142 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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 06:36:28,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:36:28,179 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2023-11-29 06:36:28,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:36:28,180 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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 06:36:28,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:36:28,181 INFO L225 Difference]: With dead ends: 24 [2023-11-29 06:36:28,181 INFO L226 Difference]: Without dead ends: 17 [2023-11-29 06:36:28,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-11-29 06:36:28,182 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 9 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:36:28,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 15 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:36:28,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-29 06:36:28,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-29 06:36:28,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 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 06:36:28,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2023-11-29 06:36:28,188 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2023-11-29 06:36:28,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:36:28,188 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2023-11-29 06:36:28,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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 06:36:28,189 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2023-11-29 06:36:28,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-29 06:36:28,189 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:36:28,189 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:36:28,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-29 06:36:28,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:36:28,396 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:36:28,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:36:28,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1725641181, now seen corresponding path program 3 times [2023-11-29 06:36:28,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:36:28,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198404114] [2023-11-29 06:36:28,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:36:28,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:36:28,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:36:29,030 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:36:29,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:36:29,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198404114] [2023-11-29 06:36:29,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198404114] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:36:29,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563202339] [2023-11-29 06:36:29,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:36:29,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:36:29,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:36:29,032 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:36:29,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 06:36:29,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 06:36:29,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:36:29,102 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 06:36:29,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:36:29,166 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 06:36:29,339 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:36:29,339 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:36:29,495 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:36:29,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563202339] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:36:29,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:36:29,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 9] total 20 [2023-11-29 06:36:29,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724800612] [2023-11-29 06:36:29,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:36:29,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 06:36:29,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:36:29,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 06:36:29,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2023-11-29 06:36:29,498 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 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 06:36:29,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:36:29,649 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2023-11-29 06:36:29,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 06:36:29,650 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 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 06:36:29,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:36:29,651 INFO L225 Difference]: With dead ends: 26 [2023-11-29 06:36:29,651 INFO L226 Difference]: Without dead ends: 22 [2023-11-29 06:36:29,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2023-11-29 06:36:29,653 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 2 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:36:29,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 46 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:36:29,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-29 06:36:29,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2023-11-29 06:36:29,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 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 06:36:29,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2023-11-29 06:36:29,660 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 16 [2023-11-29 06:36:29,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:36:29,660 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2023-11-29 06:36:29,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 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 06:36:29,660 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2023-11-29 06:36:29,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-29 06:36:29,661 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:36:29,661 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:36:29,666 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 06:36:29,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:36:29,863 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:36:29,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:36:29,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1439927635, now seen corresponding path program 4 times [2023-11-29 06:36:29,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:36:29,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60144799] [2023-11-29 06:36:29,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:36:29,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:36:29,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:36:29,967 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:36:29,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:36:29,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60144799] [2023-11-29 06:36:29,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60144799] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:36:29,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091276477] [2023-11-29 06:36:29,968 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:36:29,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:36:29,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:36:29,969 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:36:29,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 06:36:30,029 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:36:30,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:36:30,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 06:36:30,032 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:36:30,144 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:36:30,144 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:36:30,228 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:36:30,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091276477] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:36:30,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:36:30,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-11-29 06:36:30,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586759991] [2023-11-29 06:36:30,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:36:30,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 06:36:30,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:36:30,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 06:36:30,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2023-11-29 06:36:30,231 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 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 06:36:30,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:36:30,444 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2023-11-29 06:36:30,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 06:36:30,445 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 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 17 [2023-11-29 06:36:30,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:36:30,445 INFO L225 Difference]: With dead ends: 39 [2023-11-29 06:36:30,446 INFO L226 Difference]: Without dead ends: 20 [2023-11-29 06:36:30,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2023-11-29 06:36:30,447 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 41 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:36:30,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 27 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:36:30,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-29 06:36:30,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-11-29 06:36:30,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:30,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2023-11-29 06:36:30,453 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2023-11-29 06:36:30,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:36:30,453 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2023-11-29 06:36:30,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 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 06:36:30,453 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2023-11-29 06:36:30,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-29 06:36:30,454 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:36:30,454 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:36:30,460 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 06:36:30,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:36:30,661 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:36:30,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:36:30,661 INFO L85 PathProgramCache]: Analyzing trace with hash 427712167, now seen corresponding path program 5 times [2023-11-29 06:36:30,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:36:30,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307768539] [2023-11-29 06:36:30,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:36:30,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:36:30,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:36:31,505 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:36:31,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:36:31,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307768539] [2023-11-29 06:36:31,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307768539] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:36:31,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583065242] [2023-11-29 06:36:31,505 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:36:31,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:36:31,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:36:31,509 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:36:31,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 06:36:31,590 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 06:36:31,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:36:31,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-29 06:36:31,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:36:31,621 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 06:36:31,657 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 06:36:32,027 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:36:32,027 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:36:32,303 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 06:36:32,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583065242] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:36:32,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:36:32,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 11] total 33 [2023-11-29 06:36:32,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817606042] [2023-11-29 06:36:32,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:36:32,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-29 06:36:32,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:36:32,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-29 06:36:32,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=948, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 06:36:32,306 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 33 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 33 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 06:36:32,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:36:32,695 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2023-11-29 06:36:32,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 06:36:32,696 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 33 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 19 [2023-11-29 06:36:32,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:36:32,697 INFO L225 Difference]: With dead ends: 30 [2023-11-29 06:36:32,697 INFO L226 Difference]: Without dead ends: 26 [2023-11-29 06:36:32,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=155, Invalid=1327, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 06:36:32,698 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:36:32,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 44 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:36:32,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-29 06:36:32,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2023-11-29 06:36:32,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 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 06:36:32,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-11-29 06:36:32,705 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 19 [2023-11-29 06:36:32,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:36:32,705 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-11-29 06:36:32,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 33 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 06:36:32,706 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-11-29 06:36:32,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-29 06:36:32,706 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:36:32,707 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:36:32,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 06:36:32,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:36:32,908 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:36:32,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:36:32,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1784150425, now seen corresponding path program 6 times [2023-11-29 06:36:32,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:36:32,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360674456] [2023-11-29 06:36:32,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:36:32,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:36:32,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:36:33,024 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 06:36:33,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:36:33,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360674456] [2023-11-29 06:36:33,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360674456] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:36:33,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981915164] [2023-11-29 06:36:33,025 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:36:33,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:36:33,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:36:33,026 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:36:33,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 06:36:33,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 06:36:33,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:36:33,090 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 06:36:33,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:36:33,157 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 06:36:33,158 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:36:33,227 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 06:36:33,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981915164] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:36:33,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:36:33,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-11-29 06:36:33,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705271134] [2023-11-29 06:36:33,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:36:33,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 06:36:33,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:36:33,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 06:36:33,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-11-29 06:36:33,229 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 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 06:36:33,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:36:33,320 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2023-11-29 06:36:33,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 06:36:33,321 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 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 20 [2023-11-29 06:36:33,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:36:33,322 INFO L225 Difference]: With dead ends: 48 [2023-11-29 06:36:33,322 INFO L226 Difference]: Without dead ends: 27 [2023-11-29 06:36:33,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2023-11-29 06:36:33,323 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 27 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:36:33,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 26 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:36:33,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-29 06:36:33,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2023-11-29 06:36:33,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 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 06:36:33,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2023-11-29 06:36:33,328 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 20 [2023-11-29 06:36:33,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:36:33,329 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2023-11-29 06:36:33,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 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 06:36:33,329 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2023-11-29 06:36:33,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-29 06:36:33,329 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:36:33,330 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:36:33,334 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 06:36:33,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-29 06:36:33,530 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:36:33,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:36:33,531 INFO L85 PathProgramCache]: Analyzing trace with hash -2118941512, now seen corresponding path program 7 times [2023-11-29 06:36:33,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:36:33,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499795055] [2023-11-29 06:36:33,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:36:33,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:36:33,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:36:33,668 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 06:36:33,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:36:33,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499795055] [2023-11-29 06:36:33,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499795055] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:36:33,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242384217] [2023-11-29 06:36:33,669 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 06:36:33,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:36:33,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:36:33,670 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:36:33,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 06:36:33,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:36:33,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 06:36:33,745 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:36:33,825 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 06:36:33,825 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:36:33,907 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 06:36:33,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242384217] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:36:33,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:36:33,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-11-29 06:36:33,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682561453] [2023-11-29 06:36:33,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:36:33,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 06:36:33,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:36:33,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 06:36:33,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-11-29 06:36:33,909 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 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 06:36:34,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:36:34,038 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2023-11-29 06:36:34,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 06:36:34,038 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 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 21 [2023-11-29 06:36:34,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:36:34,039 INFO L225 Difference]: With dead ends: 27 [2023-11-29 06:36:34,039 INFO L226 Difference]: Without dead ends: 23 [2023-11-29 06:36:34,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 28 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2023-11-29 06:36:34,040 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 24 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:36:34,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 21 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:36:34,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-29 06:36:34,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-29 06:36:34,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 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 06:36:34,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2023-11-29 06:36:34,047 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 21 [2023-11-29 06:36:34,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:36:34,047 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2023-11-29 06:36:34,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 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 06:36:34,047 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2023-11-29 06:36:34,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-29 06:36:34,048 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:36:34,048 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:36:34,052 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 06:36:34,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 06:36:34,250 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:36:34,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:36:34,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1238907107, now seen corresponding path program 8 times [2023-11-29 06:36:34,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:36:34,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652759899] [2023-11-29 06:36:34,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:36:34,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:36:34,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:36:35,371 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 06:36:35,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:36:35,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652759899] [2023-11-29 06:36:35,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652759899] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:36:35,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970720441] [2023-11-29 06:36:35,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:36:35,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:36:35,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:36:35,373 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:36:35,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 06:36:35,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:36:35,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:36:35,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-29 06:36:35,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:36:35,496 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 06:36:35,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:36:35,988 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:36:35,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 36 [2023-11-29 06:36:36,084 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 06:36:36,084 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:36:36,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2023-11-29 06:36:36,741 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:36:36,742 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 97 treesize of output 69 [2023-11-29 06:36:36,923 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 06:36:36,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970720441] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:36:36,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:36:36,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 49 [2023-11-29 06:36:36,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660966109] [2023-11-29 06:36:36,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:36:36,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-29 06:36:36,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:36:36,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-29 06:36:36,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=2145, Unknown=0, NotChecked=0, Total=2352 [2023-11-29 06:36:36,925 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 49 states have internal predecessors, (57), 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 06:36:38,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:36:38,347 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2023-11-29 06:36:38,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-29 06:36:38,348 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 49 states have internal predecessors, (57), 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 22 [2023-11-29 06:36:38,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:36:38,349 INFO L225 Difference]: With dead ends: 58 [2023-11-29 06:36:38,349 INFO L226 Difference]: Without dead ends: 43 [2023-11-29 06:36:38,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1166 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=488, Invalid=4768, Unknown=0, NotChecked=0, Total=5256 [2023-11-29 06:36:38,352 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 25 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:36:38,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 79 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 06:36:38,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-29 06:36:38,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2023-11-29 06:36:38,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 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 06:36:38,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2023-11-29 06:36:38,360 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 22 [2023-11-29 06:36:38,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:36:38,360 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2023-11-29 06:36:38,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 49 states have internal predecessors, (57), 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 06:36:38,360 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2023-11-29 06:36:38,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-29 06:36:38,361 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:36:38,361 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:36:38,365 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 06:36:38,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 06:36:38,562 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:36:38,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:36:38,562 INFO L85 PathProgramCache]: Analyzing trace with hash 272355672, now seen corresponding path program 9 times [2023-11-29 06:36:38,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:36:38,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739909504] [2023-11-29 06:36:38,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:36:38,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:36:38,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:36:38,700 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 06:36:38,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:36:38,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739909504] [2023-11-29 06:36:38,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739909504] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:36:38,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129033009] [2023-11-29 06:36:38,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:36:38,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:36:38,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:36:38,702 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:36:38,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 06:36:38,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 06:36:38,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:36:38,777 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 06:36:38,778 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:36:38,871 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 06:36:38,871 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:36:38,932 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 06:36:38,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129033009] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:36:38,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:36:38,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2023-11-29 06:36:38,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042399528] [2023-11-29 06:36:38,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:36:38,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 06:36:38,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:36:38,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 06:36:38,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2023-11-29 06:36:38,934 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:39,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:36:39,048 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2023-11-29 06:36:39,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 06:36:39,051 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-11-29 06:36:39,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:36:39,052 INFO L225 Difference]: With dead ends: 48 [2023-11-29 06:36:39,052 INFO L226 Difference]: Without dead ends: 30 [2023-11-29 06:36:39,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 9 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2023-11-29 06:36:39,053 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 34 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:36:39,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 26 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:36:39,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-11-29 06:36:39,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2023-11-29 06:36:39,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.125) internal successors, (27), 24 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 06:36:39,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2023-11-29 06:36:39,062 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 23 [2023-11-29 06:36:39,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:36:39,062 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2023-11-29 06:36:39,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:39,063 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2023-11-29 06:36:39,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-29 06:36:39,063 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:36:39,064 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:36:39,069 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 06:36:39,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:36:39,267 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:36:39,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:36:39,268 INFO L85 PathProgramCache]: Analyzing trace with hash 932741294, now seen corresponding path program 10 times [2023-11-29 06:36:39,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:36:39,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463546993] [2023-11-29 06:36:39,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:36:39,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:36:39,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:36:39,406 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 06:36:39,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:36:39,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463546993] [2023-11-29 06:36:39,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463546993] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:36:39,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286961673] [2023-11-29 06:36:39,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:36:39,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:36:39,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:36:39,407 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:36:39,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 06:36:39,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:36:39,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:36:39,475 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 06:36:39,476 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:36:39,561 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 06:36:39,561 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:36:39,648 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 06:36:39,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286961673] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:36:39,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:36:39,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2023-11-29 06:36:39,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690493260] [2023-11-29 06:36:39,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:36:39,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 06:36:39,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:36:39,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 06:36:39,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2023-11-29 06:36:39,651 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 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 06:36:39,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:36:39,790 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2023-11-29 06:36:39,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 06:36:39,790 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 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 24 [2023-11-29 06:36:39,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:36:39,791 INFO L225 Difference]: With dead ends: 30 [2023-11-29 06:36:39,791 INFO L226 Difference]: Without dead ends: 26 [2023-11-29 06:36:39,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 10 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=172, Invalid=530, Unknown=0, NotChecked=0, Total=702 [2023-11-29 06:36:39,792 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 12 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:36:39,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 24 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:36:39,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-29 06:36:39,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-11-29 06:36:39,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 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 06:36:39,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2023-11-29 06:36:39,801 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 24 [2023-11-29 06:36:39,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:36:39,801 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2023-11-29 06:36:39,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 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 06:36:39,801 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2023-11-29 06:36:39,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-29 06:36:39,802 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:36:39,802 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:36:39,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 06:36:40,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:36:40,007 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:36:40,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:36:40,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1126020633, now seen corresponding path program 11 times [2023-11-29 06:36:40,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:36:40,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587977521] [2023-11-29 06:36:40,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:36:40,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:36:40,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:36:41,300 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:36:41,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:36:41,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587977521] [2023-11-29 06:36:41,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587977521] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:36:41,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166216771] [2023-11-29 06:36:41,301 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:36:41,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:36:41,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:36:41,302 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:36:41,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 06:36:41,377 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 06:36:41,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:36:41,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 60 conjunts are in the unsatisfiable core [2023-11-29 06:36:41,382 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:36:41,872 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:36:41,873 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:36:42,533 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:36:42,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 86 treesize of output 235 [2023-11-29 06:36:43,630 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 06:36:43,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166216771] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:36:43,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:36:43,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 15] total 46 [2023-11-29 06:36:43,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638037910] [2023-11-29 06:36:43,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:36:43,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-11-29 06:36:43,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:36:43,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-11-29 06:36:43,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1924, Unknown=0, NotChecked=0, Total=2070 [2023-11-29 06:36:43,633 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 46 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 46 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 06:36:44,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:36:44,637 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2023-11-29 06:36:44,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 06:36:44,638 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 46 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) Word has length 25 [2023-11-29 06:36:44,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:36:44,638 INFO L225 Difference]: With dead ends: 43 [2023-11-29 06:36:44,638 INFO L226 Difference]: Without dead ends: 39 [2023-11-29 06:36:44,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=255, Invalid=3285, Unknown=0, NotChecked=0, Total=3540 [2023-11-29 06:36:44,641 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 11 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:36:44,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 111 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 06:36:44,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-11-29 06:36:44,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2023-11-29 06:36:44,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 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 06:36:44,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2023-11-29 06:36:44,651 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 25 [2023-11-29 06:36:44,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:36:44,651 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2023-11-29 06:36:44,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 46 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 06:36:44,651 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2023-11-29 06:36:44,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-29 06:36:44,652 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:36:44,652 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:36:44,657 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 06:36:44,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 06:36:44,853 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:36:44,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:36:44,853 INFO L85 PathProgramCache]: Analyzing trace with hash 179830681, now seen corresponding path program 12 times [2023-11-29 06:36:44,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:36:44,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985883955] [2023-11-29 06:36:44,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:36:44,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:36:44,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:36:45,019 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 06:36:45,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:36:45,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985883955] [2023-11-29 06:36:45,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985883955] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:36:45,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963597836] [2023-11-29 06:36:45,020 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:36:45,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:36:45,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:36:45,022 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:36:45,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 06:36:45,100 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-29 06:36:45,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:36:45,102 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 06:36:45,103 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:36:45,296 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 06:36:45,297 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:36:45,474 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 06:36:45,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963597836] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:36:45,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:36:45,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 34 [2023-11-29 06:36:45,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928922882] [2023-11-29 06:36:45,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:36:45,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-29 06:36:45,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:36:45,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-29 06:36:45,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=931, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 06:36:45,477 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 34 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:45,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:36:45,833 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2023-11-29 06:36:45,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 06:36:45,834 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-29 06:36:45,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:36:45,834 INFO L225 Difference]: With dead ends: 57 [2023-11-29 06:36:45,835 INFO L226 Difference]: Without dead ends: 29 [2023-11-29 06:36:45,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=450, Invalid=2306, Unknown=0, NotChecked=0, Total=2756 [2023-11-29 06:36:45,837 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 42 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:36:45,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 45 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:36:45,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-29 06:36:45,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-11-29 06:36:45,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:45,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2023-11-29 06:36:45,848 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 26 [2023-11-29 06:36:45,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:36:45,848 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2023-11-29 06:36:45,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:45,849 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2023-11-29 06:36:45,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-29 06:36:45,849 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:36:45,849 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:36:45,854 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 06:36:46,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 06:36:46,050 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:36:46,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:36:46,050 INFO L85 PathProgramCache]: Analyzing trace with hash 563686493, now seen corresponding path program 13 times [2023-11-29 06:36:46,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:36:46,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296833082] [2023-11-29 06:36:46,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:36:46,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:36:46,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:36:47,674 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 3 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:36:47,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:36:47,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296833082] [2023-11-29 06:36:47,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296833082] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:36:47,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67421546] [2023-11-29 06:36:47,675 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 06:36:47,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:36:47,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:36:47,676 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:36:47,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 06:36:47,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:36:47,737 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 72 conjunts are in the unsatisfiable core [2023-11-29 06:36:47,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:36:47,854 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 06:36:48,510 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:36:48,510 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:36:49,365 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-29 06:36:49,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67421546] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:36:49,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:36:49,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 17] total 56 [2023-11-29 06:36:49,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842760749] [2023-11-29 06:36:49,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:36:49,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-11-29 06:36:49,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:36:49,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-11-29 06:36:49,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=2894, Unknown=0, NotChecked=0, Total=3080 [2023-11-29 06:36:49,368 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 56 states, 56 states have (on average 1.2142857142857142) internal successors, (68), 56 states have internal predecessors, (68), 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 06:36:50,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:36:50,842 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2023-11-29 06:36:50,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 06:36:50,842 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.2142857142857142) internal successors, (68), 56 states have internal predecessors, (68), 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 06:36:50,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:36:50,843 INFO L225 Difference]: With dead ends: 47 [2023-11-29 06:36:50,843 INFO L226 Difference]: Without dead ends: 43 [2023-11-29 06:36:50,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=325, Invalid=4931, Unknown=0, NotChecked=0, Total=5256 [2023-11-29 06:36:50,846 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 21 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 06:36:50,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 121 Invalid, 861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 845 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 06:36:50,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-29 06:36:50,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2023-11-29 06:36:50,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 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 06:36:50,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2023-11-29 06:36:50,862 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 28 [2023-11-29 06:36:50,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:36:50,862 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2023-11-29 06:36:50,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.2142857142857142) internal successors, (68), 56 states have internal predecessors, (68), 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 06:36:50,862 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2023-11-29 06:36:50,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-29 06:36:50,863 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:36:50,863 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:36:50,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-29 06:36:51,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 06:36:51,071 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:36:51,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:36:51,072 INFO L85 PathProgramCache]: Analyzing trace with hash 635155885, now seen corresponding path program 14 times [2023-11-29 06:36:51,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:36:51,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178787079] [2023-11-29 06:36:51,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:36:51,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:36:51,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:36:51,263 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-29 06:36:51,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:36:51,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178787079] [2023-11-29 06:36:51,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178787079] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:36:51,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127583418] [2023-11-29 06:36:51,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:36:51,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:36:51,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:36:51,265 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:36:51,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 06:36:51,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:36:51,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:36:51,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 06:36:51,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:36:51,489 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-29 06:36:51,489 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:36:51,597 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-29 06:36:51,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127583418] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:36:51,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:36:51,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-11-29 06:36:51,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968723153] [2023-11-29 06:36:51,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:36:51,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 06:36:51,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:36:51,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 06:36:51,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2023-11-29 06:36:51,599 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 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 06:36:51,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:36:51,785 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2023-11-29 06:36:51,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 06:36:51,786 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 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 29 [2023-11-29 06:36:51,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:36:51,787 INFO L225 Difference]: With dead ends: 66 [2023-11-29 06:36:51,787 INFO L226 Difference]: Without dead ends: 36 [2023-11-29 06:36:51,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 36 SyntacticMatches, 13 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 06:36:51,788 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 27 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:36:51,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 32 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:36:51,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-29 06:36:51,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2023-11-29 06:36:51,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1) internal successors, (33), 30 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 06:36:51,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2023-11-29 06:36:51,803 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 29 [2023-11-29 06:36:51,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:36:51,803 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2023-11-29 06:36:51,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 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 06:36:51,803 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2023-11-29 06:36:51,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-29 06:36:51,804 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:36:51,804 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:36:51,809 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 06:36:52,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 06:36:52,004 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:36:52,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:36:52,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1708049042, now seen corresponding path program 15 times [2023-11-29 06:36:52,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:36:52,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990958978] [2023-11-29 06:36:52,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:36:52,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:36:52,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:36:52,227 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-29 06:36:52,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:36:52,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990958978] [2023-11-29 06:36:52,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990958978] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:36:52,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139675977] [2023-11-29 06:36:52,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:36:52,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:36:52,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:36:52,229 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:36:52,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 06:36:52,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-29 06:36:52,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:36:52,352 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 06:36:52,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:36:52,526 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-29 06:36:52,526 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:36:52,673 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-29 06:36:52,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139675977] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:36:52,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:36:52,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-11-29 06:36:52,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555096947] [2023-11-29 06:36:52,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:36:52,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 06:36:52,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:36:52,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 06:36:52,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2023-11-29 06:36:52,675 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 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 06:36:52,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:36:52,874 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2023-11-29 06:36:52,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 06:36:52,874 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 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 30 [2023-11-29 06:36:52,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:36:52,875 INFO L225 Difference]: With dead ends: 36 [2023-11-29 06:36:52,875 INFO L226 Difference]: Without dead ends: 32 [2023-11-29 06:36:52,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 37 SyntacticMatches, 14 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=281, Invalid=909, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 06:36:52,876 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 30 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:36:52,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 24 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:36:52,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-29 06:36:52,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-11-29 06:36:52,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:52,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2023-11-29 06:36:52,892 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 30 [2023-11-29 06:36:52,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:36:52,892 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2023-11-29 06:36:52,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 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 06:36:52,893 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2023-11-29 06:36:52,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-29 06:36:52,893 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:36:52,893 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:36:52,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 06:36:53,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 06:36:53,094 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:36:53,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:36:53,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1386142425, now seen corresponding path program 16 times [2023-11-29 06:36:53,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:36:53,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362396426] [2023-11-29 06:36:53,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:36:53,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:36:53,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:36:55,636 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 6 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:36:55,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:36:55,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362396426] [2023-11-29 06:36:55,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362396426] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:36:55,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424532827] [2023-11-29 06:36:55,637 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:36:55,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:36:55,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:36:55,638 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:36:55,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 06:36:55,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:36:55,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:36:55,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 68 conjunts are in the unsatisfiable core [2023-11-29 06:36:55,729 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:36:55,777 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 06:36:58,435 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 7 proven. 56 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-29 06:36:58,435 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:36:59,745 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-29 06:36:59,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424532827] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:36:59,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:36:59,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 21, 19] total 61 [2023-11-29 06:36:59,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098596519] [2023-11-29 06:36:59,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:36:59,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-11-29 06:36:59,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:36:59,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-11-29 06:36:59,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=3446, Unknown=4, NotChecked=0, Total=3660 [2023-11-29 06:36:59,753 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 61 states, 61 states have (on average 1.2131147540983607) internal successors, (74), 61 states have internal predecessors, (74), 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 06:37:02,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:37:02,331 INFO L93 Difference]: Finished difference Result 51 states and 54 transitions. [2023-11-29 06:37:02,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 06:37:02,331 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.2131147540983607) internal successors, (74), 61 states have internal predecessors, (74), 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 31 [2023-11-29 06:37:02,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:37:02,332 INFO L225 Difference]: With dead ends: 51 [2023-11-29 06:37:02,332 INFO L226 Difference]: Without dead ends: 47 [2023-11-29 06:37:02,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=430, Invalid=6706, Unknown=4, NotChecked=0, Total=7140 [2023-11-29 06:37:02,334 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 20 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 1134 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 1149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 06:37:02,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 161 Invalid, 1149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1134 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 06:37:02,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-29 06:37:02,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 35. [2023-11-29 06:37:02,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 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 06:37:02,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2023-11-29 06:37:02,355 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 31 [2023-11-29 06:37:02,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:37:02,355 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2023-11-29 06:37:02,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.2131147540983607) internal successors, (74), 61 states have internal predecessors, (74), 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 06:37:02,355 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2023-11-29 06:37:02,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-29 06:37:02,356 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:37:02,356 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:37:02,361 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 06:37:02,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:37:02,557 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:37:02,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:37:02,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1239270809, now seen corresponding path program 17 times [2023-11-29 06:37:02,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:37:02,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784131924] [2023-11-29 06:37:02,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:37:02,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:37:02,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:37:02,803 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-29 06:37:02,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:37:02,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784131924] [2023-11-29 06:37:02,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784131924] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:37:02,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884456596] [2023-11-29 06:37:02,804 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:37:02,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:37:02,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:37:02,805 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:37:02,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 06:37:02,920 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-29 06:37:02,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:37:02,921 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 06:37:02,922 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:37:03,072 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-29 06:37:03,072 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:37:03,199 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-29 06:37:03,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884456596] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:37:03,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:37:03,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2023-11-29 06:37:03,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926810333] [2023-11-29 06:37:03,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:37:03,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 06:37:03,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:37:03,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 06:37:03,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2023-11-29 06:37:03,201 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 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 06:37:03,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:37:03,389 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2023-11-29 06:37:03,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 06:37:03,390 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 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 32 [2023-11-29 06:37:03,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:37:03,390 INFO L225 Difference]: With dead ends: 72 [2023-11-29 06:37:03,390 INFO L226 Difference]: Without dead ends: 39 [2023-11-29 06:37:03,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 39 SyntacticMatches, 15 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2023-11-29 06:37:03,392 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 26 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:37:03,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 29 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:37:03,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-11-29 06:37:03,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2023-11-29 06:37:03,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 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 06:37:03,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2023-11-29 06:37:03,409 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 32 [2023-11-29 06:37:03,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:37:03,410 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2023-11-29 06:37:03,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 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 06:37:03,410 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2023-11-29 06:37:03,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-29 06:37:03,410 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:37:03,410 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:37:03,415 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 06:37:03,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:37:03,611 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:37:03,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:37:03,611 INFO L85 PathProgramCache]: Analyzing trace with hash 924752440, now seen corresponding path program 18 times [2023-11-29 06:37:03,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:37:03,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069393252] [2023-11-29 06:37:03,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:37:03,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:37:03,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:37:03,870 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-29 06:37:03,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:37:03,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069393252] [2023-11-29 06:37:03,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069393252] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:37:03,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795684879] [2023-11-29 06:37:03,870 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:37:03,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:37:03,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:37:03,871 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:37:03,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 06:37:03,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-29 06:37:03,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:37:03,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 06:37:03,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:37:04,134 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-29 06:37:04,134 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:37:04,299 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-29 06:37:04,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795684879] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:37:04,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:37:04,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2023-11-29 06:37:04,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878902720] [2023-11-29 06:37:04,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:37:04,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 06:37:04,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:37:04,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 06:37:04,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2023-11-29 06:37:04,301 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 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 06:37:04,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:37:04,500 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2023-11-29 06:37:04,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 06:37:04,500 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 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 33 [2023-11-29 06:37:04,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:37:04,501 INFO L225 Difference]: With dead ends: 39 [2023-11-29 06:37:04,501 INFO L226 Difference]: Without dead ends: 35 [2023-11-29 06:37:04,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 40 SyntacticMatches, 16 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=346, Invalid=1136, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 06:37:04,502 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 30 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:37:04,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 15 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:37:04,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-29 06:37:04,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-11-29 06:37:04,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 states have internal predecessors, (37), 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 06:37:04,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2023-11-29 06:37:04,522 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 33 [2023-11-29 06:37:04,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:37:04,522 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2023-11-29 06:37:04,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 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 06:37:04,522 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2023-11-29 06:37:04,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-29 06:37:04,522 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:37:04,522 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:37:04,527 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 06:37:04,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:37:04,723 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:37:04,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:37:04,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1373675107, now seen corresponding path program 19 times [2023-11-29 06:37:04,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:37:04,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825608974] [2023-11-29 06:37:04,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:37:04,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:37:04,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:37:07,545 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 10 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:37:07,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:37:07,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825608974] [2023-11-29 06:37:07,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825608974] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:37:07,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063166493] [2023-11-29 06:37:07,546 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 06:37:07,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:37:07,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:37:07,547 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:37:07,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 06:37:07,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:37:07,623 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 92 conjunts are in the unsatisfiable core [2023-11-29 06:37:07,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:37:07,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:37:08,989 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:37:08,989 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:37:10,616 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-29 06:37:10,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063166493] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:37:10,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:37:10,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 21] total 72 [2023-11-29 06:37:10,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575415247] [2023-11-29 06:37:10,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:37:10,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2023-11-29 06:37:10,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:37:10,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2023-11-29 06:37:10,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=4843, Unknown=0, NotChecked=0, Total=5112 [2023-11-29 06:37:10,619 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 72 states, 72 states have (on average 1.1666666666666667) internal successors, (84), 72 states have internal predecessors, (84), 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 06:37:13,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:37:13,204 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2023-11-29 06:37:13,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-29 06:37:13,206 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.1666666666666667) internal successors, (84), 72 states have internal predecessors, (84), 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 34 [2023-11-29 06:37:13,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:37:13,207 INFO L225 Difference]: With dead ends: 55 [2023-11-29 06:37:13,207 INFO L226 Difference]: Without dead ends: 51 [2023-11-29 06:37:13,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2124 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=482, Invalid=8448, Unknown=0, NotChecked=0, Total=8930 [2023-11-29 06:37:13,210 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 12 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 1320 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 1330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:37:13,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 153 Invalid, 1330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1320 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 06:37:13,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-29 06:37:13,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2023-11-29 06:37:13,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 37 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 06:37:13,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2023-11-29 06:37:13,225 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 34 [2023-11-29 06:37:13,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:37:13,225 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2023-11-29 06:37:13,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.1666666666666667) internal successors, (84), 72 states have internal predecessors, (84), 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 06:37:13,226 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2023-11-29 06:37:13,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-29 06:37:13,226 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:37:13,226 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:37:13,231 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 06:37:13,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:37:13,427 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:37:13,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:37:13,427 INFO L85 PathProgramCache]: Analyzing trace with hash 58332973, now seen corresponding path program 20 times [2023-11-29 06:37:13,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:37:13,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252898075] [2023-11-29 06:37:13,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:37:13,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:37:13,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:37:13,656 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 37 proven. 44 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-29 06:37:13,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:37:13,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252898075] [2023-11-29 06:37:13,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252898075] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:37:13,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011372589] [2023-11-29 06:37:13,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:37:13,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:37:13,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:37:13,657 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:37:13,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 06:37:13,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:37:13,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:37:13,733 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 06:37:13,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:37:13,897 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-29 06:37:13,897 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:37:14,028 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-29 06:37:14,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011372589] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:37:14,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:37:14,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2023-11-29 06:37:14,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052627853] [2023-11-29 06:37:14,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:37:14,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-29 06:37:14,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:37:14,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-29 06:37:14,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2023-11-29 06:37:14,030 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 32 states, 32 states have (on average 1.3125) internal successors, (42), 32 states have internal predecessors, (42), 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 06:37:14,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:37:14,210 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2023-11-29 06:37:14,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 06:37:14,211 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.3125) internal successors, (42), 32 states have internal predecessors, (42), 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 06:37:14,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:37:14,211 INFO L225 Difference]: With dead ends: 78 [2023-11-29 06:37:14,211 INFO L226 Difference]: Without dead ends: 42 [2023-11-29 06:37:14,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 42 SyntacticMatches, 17 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=407, Invalid=1233, Unknown=0, NotChecked=0, Total=1640 [2023-11-29 06:37:14,212 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 45 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:37:14,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 32 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:37:14,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-11-29 06:37:14,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2023-11-29 06:37:14,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 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 06:37:14,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2023-11-29 06:37:14,227 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 35 [2023-11-29 06:37:14,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:37:14,227 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2023-11-29 06:37:14,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.3125) internal successors, (42), 32 states have internal predecessors, (42), 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 06:37:14,227 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2023-11-29 06:37:14,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-29 06:37:14,228 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:37:14,228 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:37:14,232 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 06:37:14,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-29 06:37:14,428 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:37:14,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:37:14,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1860241966, now seen corresponding path program 21 times [2023-11-29 06:37:14,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:37:14,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121437621] [2023-11-29 06:37:14,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:37:14,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:37:14,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:37:14,651 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 28 proven. 53 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 06:37:14,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:37:14,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121437621] [2023-11-29 06:37:14,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121437621] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:37:14,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080406458] [2023-11-29 06:37:14,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:37:14,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:37:14,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:37:14,652 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:37:14,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 06:37:14,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-29 06:37:14,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:37:14,761 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 06:37:14,762 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:37:14,905 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 06:37:14,906 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:37:15,053 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 06:37:15,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080406458] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:37:15,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:37:15,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2023-11-29 06:37:15,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9421853] [2023-11-29 06:37:15,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:37:15,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-29 06:37:15,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:37:15,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-29 06:37:15,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2023-11-29 06:37:15,055 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 32 states, 32 states have (on average 1.65625) internal successors, (53), 32 states have internal predecessors, (53), 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 06:37:15,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:37:15,253 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2023-11-29 06:37:15,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 06:37:15,254 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.65625) internal successors, (53), 32 states have internal predecessors, (53), 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 06:37:15,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:37:15,254 INFO L225 Difference]: With dead ends: 42 [2023-11-29 06:37:15,254 INFO L226 Difference]: Without dead ends: 38 [2023-11-29 06:37:15,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 44 SyntacticMatches, 18 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=418, Invalid=1388, Unknown=0, NotChecked=0, Total=1806 [2023-11-29 06:37:15,255 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 24 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:37:15,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 18 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:37:15,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-29 06:37:15,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-11-29 06:37:15,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 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 06:37:15,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2023-11-29 06:37:15,278 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 36 [2023-11-29 06:37:15,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:37:15,278 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2023-11-29 06:37:15,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.65625) internal successors, (53), 32 states have internal predecessors, (53), 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 06:37:15,279 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2023-11-29 06:37:15,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-29 06:37:15,279 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:37:15,279 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:37:15,284 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 06:37:15,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 06:37:15,480 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:37:15,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:37:15,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1856696423, now seen corresponding path program 22 times [2023-11-29 06:37:15,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:37:15,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328922768] [2023-11-29 06:37:15,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:37:15,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:37:15,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:37:18,769 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:37:18,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:37:18,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328922768] [2023-11-29 06:37:18,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328922768] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:37:18,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564146814] [2023-11-29 06:37:18,770 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:37:18,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:37:18,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:37:18,771 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:37:18,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 06:37:18,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:37:18,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:37:18,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 84 conjunts are in the unsatisfiable core [2023-11-29 06:37:18,872 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:37:18,932 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 06:37:43,686 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 9 proven. 90 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-29 06:37:43,686 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:37:46,236 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 06:37:46,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564146814] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:37:46,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:37:46,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 25, 23] total 75 [2023-11-29 06:37:46,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421558844] [2023-11-29 06:37:46,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:37:46,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2023-11-29 06:37:46,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:37:46,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2023-11-29 06:37:46,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=5285, Unknown=10, NotChecked=0, Total=5550 [2023-11-29 06:37:46,239 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 75 states, 75 states have (on average 1.1733333333333333) internal successors, (88), 75 states have internal predecessors, (88), 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 06:37:50,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:37:50,044 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2023-11-29 06:37:50,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-29 06:37:50,044 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.1733333333333333) internal successors, (88), 75 states have internal predecessors, (88), 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 06:37:50,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:37:50,045 INFO L225 Difference]: With dead ends: 54 [2023-11-29 06:37:50,045 INFO L226 Difference]: Without dead ends: 50 [2023-11-29 06:37:50,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1707 ImplicationChecksByTransitivity, 30.6s TimeCoverageRelationStatistics Valid=479, Invalid=10431, Unknown=10, NotChecked=0, Total=10920 [2023-11-29 06:37:50,047 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 1673 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:37:50,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 114 Invalid, 1677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1673 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 06:37:50,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-29 06:37:50,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2023-11-29 06:37:50,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.1) internal successors, (44), 40 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 06:37:50,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2023-11-29 06:37:50,069 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 37 [2023-11-29 06:37:50,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:37:50,069 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2023-11-29 06:37:50,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.1733333333333333) internal successors, (88), 75 states have internal predecessors, (88), 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 06:37:50,069 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2023-11-29 06:37:50,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-29 06:37:50,070 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:37:50,070 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:37:50,074 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 06:37:50,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 06:37:50,270 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:37:50,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:37:50,271 INFO L85 PathProgramCache]: Analyzing trace with hash 70077337, now seen corresponding path program 23 times [2023-11-29 06:37:50,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:37:50,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614592920] [2023-11-29 06:37:50,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:37:50,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:37:50,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:37:50,508 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 46 proven. 54 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 06:37:50,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:37:50,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614592920] [2023-11-29 06:37:50,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614592920] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:37:50,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189816979] [2023-11-29 06:37:50,509 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:37:50,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:37:50,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:37:50,510 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:37:50,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 06:37:50,658 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-11-29 06:37:50,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:37:50,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 06:37:50,662 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:37:50,996 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 06:37:50,996 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:37:51,309 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 06:37:51,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189816979] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:37:51,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:37:51,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 54 [2023-11-29 06:37:51,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468735202] [2023-11-29 06:37:51,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:37:51,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-11-29 06:37:51,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:37:51,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-11-29 06:37:51,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=2409, Unknown=0, NotChecked=0, Total=2862 [2023-11-29 06:37:51,311 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 54 states, 54 states have (on average 1.2407407407407407) internal successors, (67), 54 states have internal predecessors, (67), 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 06:37:51,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:37:51,845 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2023-11-29 06:37:51,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-29 06:37:51,845 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.2407407407407407) internal successors, (67), 54 states have internal predecessors, (67), 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 06:37:51,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:37:51,846 INFO L225 Difference]: With dead ends: 81 [2023-11-29 06:37:51,846 INFO L226 Difference]: Without dead ends: 41 [2023-11-29 06:37:51,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 37 SyntacticMatches, 11 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2793 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1062, Invalid=6078, Unknown=0, NotChecked=0, Total=7140 [2023-11-29 06:37:51,847 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 77 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:37:51,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 30 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 06:37:51,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-29 06:37:51,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-11-29 06:37:51,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.075) internal successors, (43), 40 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 06:37:51,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2023-11-29 06:37:51,867 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 38 [2023-11-29 06:37:51,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:37:51,867 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2023-11-29 06:37:51,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.2407407407407407) internal successors, (67), 54 states have internal predecessors, (67), 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 06:37:51,867 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2023-11-29 06:37:51,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-29 06:37:51,867 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:37:51,867 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:37:51,872 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 06:37:52,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 06:37:52,068 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:37:52,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:37:52,068 INFO L85 PathProgramCache]: Analyzing trace with hash 732587741, now seen corresponding path program 24 times [2023-11-29 06:37:52,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:37:52,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603984476] [2023-11-29 06:37:52,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:37:52,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:37:52,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:37:55,553 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 21 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:37:55,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:37:55,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603984476] [2023-11-29 06:37:55,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603984476] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:37:55,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810929464] [2023-11-29 06:37:55,553 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:37:55,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:37:55,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:37:55,554 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:37:55,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 06:37:55,680 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-11-29 06:37:55,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:37:55,683 WARN L260 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 117 conjunts are in the unsatisfiable core [2023-11-29 06:37:55,686 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:37:55,883 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 06:37:57,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:37:57,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:37:57,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:37:57,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:37:57,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:37:57,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:37:57,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:37:57,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:37:57,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:37:57,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:37:57,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:37:57,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:37:57,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:37:57,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:37:57,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:37:57,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:37:57,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:37:57,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:37:57,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:37:57,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:37:57,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:37:58,117 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:37:58,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 63 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 104 treesize of output 246 [2023-11-29 06:37:58,575 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 3 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:37:58,575 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:38:01,991 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 129 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-29 06:38:01,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810929464] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:38:01,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:38:01,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 30] total 94 [2023-11-29 06:38:01,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218431262] [2023-11-29 06:38:01,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:38:01,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2023-11-29 06:38:01,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:38:01,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2023-11-29 06:38:01,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=636, Invalid=8106, Unknown=0, NotChecked=0, Total=8742 [2023-11-29 06:38:01,993 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 94 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 06:38:09,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:38:09,550 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2023-11-29 06:38:09,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-11-29 06:38:09,551 INFO L78 Accepts]: Start accepts. Automaton has has 94 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) Word has length 40 [2023-11-29 06:38:09,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:38:09,552 INFO L225 Difference]: With dead ends: 58 [2023-11-29 06:38:09,552 INFO L226 Difference]: Without dead ends: 54 [2023-11-29 06:38:09,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4066 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=1591, Invalid=16231, Unknown=0, NotChecked=0, Total=17822 [2023-11-29 06:38:09,554 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 92 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1964 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 2118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-29 06:38:09,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 87 Invalid, 2118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1964 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-29 06:38:09,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-29 06:38:09,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 44. [2023-11-29 06:38:09,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:38:09,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2023-11-29 06:38:09,595 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 40 [2023-11-29 06:38:09,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:38:09,595 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2023-11-29 06:38:09,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 94 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 06:38:09,596 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2023-11-29 06:38:09,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-29 06:38:09,596 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:38:09,596 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:38:09,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-29 06:38:09,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 06:38:09,796 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:38:09,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:38:09,797 INFO L85 PathProgramCache]: Analyzing trace with hash 820836525, now seen corresponding path program 25 times [2023-11-29 06:38:09,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:38:09,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961783997] [2023-11-29 06:38:09,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:38:09,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:38:09,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:38:10,100 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 56 proven. 65 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 06:38:10,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:38:10,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961783997] [2023-11-29 06:38:10,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961783997] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:38:10,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160490948] [2023-11-29 06:38:10,101 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 06:38:10,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:38:10,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:38:10,102 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:38:10,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 06:38:10,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:38:10,198 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 06:38:10,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:38:10,430 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 06:38:10,430 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:38:10,611 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 06:38:10,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160490948] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:38:10,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:38:10,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 38 [2023-11-29 06:38:10,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457207060] [2023-11-29 06:38:10,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:38:10,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-29 06:38:10,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:38:10,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-29 06:38:10,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=1065, Unknown=0, NotChecked=0, Total=1406 [2023-11-29 06:38:10,612 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 38 states, 38 states have (on average 1.263157894736842) internal successors, (48), 38 states have internal predecessors, (48), 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 06:38:10,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:38:10,869 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2023-11-29 06:38:10,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 06:38:10,870 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.263157894736842) internal successors, (48), 38 states have internal predecessors, (48), 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 41 [2023-11-29 06:38:10,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:38:10,870 INFO L225 Difference]: With dead ends: 90 [2023-11-29 06:38:10,870 INFO L226 Difference]: Without dead ends: 48 [2023-11-29 06:38:10,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 48 SyntacticMatches, 21 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=572, Invalid=1780, Unknown=0, NotChecked=0, Total=2352 [2023-11-29 06:38:10,871 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 49 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:38:10,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 32 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:38:10,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-29 06:38:10,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2023-11-29 06:38:10,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 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 06:38:10,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2023-11-29 06:38:10,897 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 41 [2023-11-29 06:38:10,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:38:10,897 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2023-11-29 06:38:10,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.263157894736842) internal successors, (48), 38 states have internal predecessors, (48), 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 06:38:10,897 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2023-11-29 06:38:10,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-29 06:38:10,897 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:38:10,897 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:38:10,902 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 06:38:11,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 06:38:11,098 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:38:11,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:38:11,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1225267474, now seen corresponding path program 26 times [2023-11-29 06:38:11,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:38:11,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854751323] [2023-11-29 06:38:11,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:38:11,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:38:11,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:38:11,429 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 45 proven. 76 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-29 06:38:11,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:38:11,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854751323] [2023-11-29 06:38:11,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854751323] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:38:11,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227764426] [2023-11-29 06:38:11,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:38:11,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:38:11,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:38:11,430 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:38:11,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 06:38:11,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:38:11,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:38:11,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 06:38:11,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:38:11,767 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-29 06:38:11,768 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:38:11,992 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-29 06:38:11,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227764426] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:38:11,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:38:11,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 38 [2023-11-29 06:38:11,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276486964] [2023-11-29 06:38:11,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:38:11,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-29 06:38:11,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:38:11,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-29 06:38:11,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=1065, Unknown=0, NotChecked=0, Total=1406 [2023-11-29 06:38:11,994 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 38 states, 38 states have (on average 1.263157894736842) internal successors, (48), 38 states have internal predecessors, (48), 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 06:38:12,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:38:12,229 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2023-11-29 06:38:12,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 06:38:12,229 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.263157894736842) internal successors, (48), 38 states have internal predecessors, (48), 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 42 [2023-11-29 06:38:12,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:38:12,230 INFO L225 Difference]: With dead ends: 48 [2023-11-29 06:38:12,230 INFO L226 Difference]: Without dead ends: 44 [2023-11-29 06:38:12,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 49 SyntacticMatches, 22 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=583, Invalid=1967, Unknown=0, NotChecked=0, Total=2550 [2023-11-29 06:38:12,231 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 24 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:38:12,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 21 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:38:12,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-29 06:38:12,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-11-29 06:38:12,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 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 06:38:12,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2023-11-29 06:38:12,257 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 42 [2023-11-29 06:38:12,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:38:12,257 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2023-11-29 06:38:12,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.263157894736842) internal successors, (48), 38 states have internal predecessors, (48), 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 06:38:12,257 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2023-11-29 06:38:12,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-29 06:38:12,257 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:38:12,257 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:38:12,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-29 06:38:12,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 06:38:12,458 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:38:12,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:38:12,458 INFO L85 PathProgramCache]: Analyzing trace with hash 695184295, now seen corresponding path program 27 times [2023-11-29 06:38:12,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:38:12,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69852428] [2023-11-29 06:38:12,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:38:12,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:38:12,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:38:16,978 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 15 proven. 183 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:38:16,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:38:16,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69852428] [2023-11-29 06:38:16,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69852428] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:38:16,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208177731] [2023-11-29 06:38:16,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:38:16,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:38:16,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:38:16,980 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:38:16,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 06:38:17,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-29 06:38:17,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:38:17,180 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 113 conjunts are in the unsatisfiable core [2023-11-29 06:38:17,183 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:38:17,258 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 06:38:19,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:38:19,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:38:19,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:38:19,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:38:19,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:38:19,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:38:19,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:38:19,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:38:19,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:38:19,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:38:19,865 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:38:19,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 96 treesize of output 168 [2023-11-29 06:38:20,142 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 11 proven. 132 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 06:38:20,142 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:38:23,797 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 143 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 06:38:23,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208177731] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:38:23,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:38:23,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 32, 29] total 94 [2023-11-29 06:38:23,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250036976] [2023-11-29 06:38:23,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:38:23,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2023-11-29 06:38:23,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:38:23,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2023-11-29 06:38:23,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=436, Invalid=8306, Unknown=0, NotChecked=0, Total=8742 [2023-11-29 06:38:23,800 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 94 states, 94 states have (on average 1.1170212765957446) internal successors, (105), 94 states have internal predecessors, (105), 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 06:38:33,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:38:33,573 INFO L93 Difference]: Finished difference Result 67 states and 70 transitions. [2023-11-29 06:38:33,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-29 06:38:33,573 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.1170212765957446) internal successors, (105), 94 states have internal predecessors, (105), 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 06:38:33,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:38:33,574 INFO L225 Difference]: With dead ends: 67 [2023-11-29 06:38:33,574 INFO L226 Difference]: Without dead ends: 63 [2023-11-29 06:38:33,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3261 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=1161, Invalid=17471, Unknown=0, NotChecked=0, Total=18632 [2023-11-29 06:38:33,575 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 71 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 2638 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 2737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 2638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:38:33,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 247 Invalid, 2737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 2638 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-29 06:38:33,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-29 06:38:33,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 47. [2023-11-29 06:38:33,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 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 06:38:33,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2023-11-29 06:38:33,609 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 43 [2023-11-29 06:38:33,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:38:33,609 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2023-11-29 06:38:33,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 1.1170212765957446) internal successors, (105), 94 states have internal predecessors, (105), 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 06:38:33,609 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2023-11-29 06:38:33,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-29 06:38:33,610 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:38:33,610 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:38:33,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-29 06:38:33,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:38:33,810 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:38:33,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:38:33,810 INFO L85 PathProgramCache]: Analyzing trace with hash -603287143, now seen corresponding path program 28 times [2023-11-29 06:38:33,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:38:33,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440571457] [2023-11-29 06:38:33,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:38:33,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:38:33,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:38:34,152 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 67 proven. 77 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-29 06:38:34,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:38:34,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440571457] [2023-11-29 06:38:34,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440571457] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:38:34,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399735450] [2023-11-29 06:38:34,153 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:38:34,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:38:34,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:38:34,154 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:38:34,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 06:38:34,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:38:34,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:38:34,253 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-29 06:38:34,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:38:34,726 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-29 06:38:34,726 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:38:35,166 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-29 06:38:35,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399735450] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:38:35,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:38:35,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 64 [2023-11-29 06:38:35,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651703561] [2023-11-29 06:38:35,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:38:35,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-11-29 06:38:35,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:38:35,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-11-29 06:38:35,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=626, Invalid=3406, Unknown=0, NotChecked=0, Total=4032 [2023-11-29 06:38:35,168 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 64 states, 64 states have (on average 1.203125) internal successors, (77), 64 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:38:35,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:38:35,870 INFO L93 Difference]: Finished difference Result 93 states and 100 transitions. [2023-11-29 06:38:35,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-29 06:38:35,871 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.203125) internal successors, (77), 64 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-11-29 06:38:35,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:38:35,871 INFO L225 Difference]: With dead ends: 93 [2023-11-29 06:38:35,871 INFO L226 Difference]: Without dead ends: 47 [2023-11-29 06:38:35,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 41 SyntacticMatches, 13 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4049 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1464, Invalid=8636, Unknown=0, NotChecked=0, Total=10100 [2023-11-29 06:38:35,872 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 74 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:38:35,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 39 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 06:38:35,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-29 06:38:35,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-11-29 06:38:35,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 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 06:38:35,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2023-11-29 06:38:35,906 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 44 [2023-11-29 06:38:35,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:38:35,907 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2023-11-29 06:38:35,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.203125) internal successors, (77), 64 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:38:35,907 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2023-11-29 06:38:35,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-29 06:38:35,907 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:38:35,907 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:38:35,911 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-29 06:38:36,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-11-29 06:38:36,108 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:38:36,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:38:36,108 INFO L85 PathProgramCache]: Analyzing trace with hash 891960349, now seen corresponding path program 29 times [2023-11-29 06:38:36,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:38:36,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200225840] [2023-11-29 06:38:36,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:38:36,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:38:36,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:38:40,979 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 36 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:38:40,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:38:40,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200225840] [2023-11-29 06:38:40,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200225840] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:38:40,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504199210] [2023-11-29 06:38:40,980 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:38:40,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:38:40,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:38:40,981 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:38:40,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-29 06:38:41,199 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-11-29 06:38:41,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:38:41,203 WARN L260 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 132 conjunts are in the unsatisfiable core [2023-11-29 06:38:41,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:38:41,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:38:44,072 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:38:44,072 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:38:47,909 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-29 06:38:47,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504199210] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:38:47,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:38:47,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 29] total 104 [2023-11-29 06:38:47,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557911735] [2023-11-29 06:38:47,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:38:47,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2023-11-29 06:38:47,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:38:47,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2023-11-29 06:38:47,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=10216, Unknown=0, NotChecked=0, Total=10712 [2023-11-29 06:38:47,912 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 104 states, 104 states have (on average 1.1153846153846154) internal successors, (116), 104 states have internal predecessors, (116), 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 06:38:53,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:38:53,196 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2023-11-29 06:38:53,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-29 06:38:53,197 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 1.1153846153846154) internal successors, (116), 104 states have internal predecessors, (116), 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 46 [2023-11-29 06:38:53,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:38:53,197 INFO L225 Difference]: With dead ends: 71 [2023-11-29 06:38:53,197 INFO L226 Difference]: Without dead ends: 67 [2023-11-29 06:38:53,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4777 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=900, Invalid=18006, Unknown=0, NotChecked=0, Total=18906 [2023-11-29 06:38:53,199 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 20 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 2608 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 2624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 2608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:38:53,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 234 Invalid, 2624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 2608 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-29 06:38:53,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-29 06:38:53,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2023-11-29 06:38:53,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 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 06:38:53,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2023-11-29 06:38:53,239 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 46 [2023-11-29 06:38:53,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:38:53,239 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2023-11-29 06:38:53,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 1.1153846153846154) internal successors, (116), 104 states have internal predecessors, (116), 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 06:38:53,239 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2023-11-29 06:38:53,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-29 06:38:53,240 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:38:53,240 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:38:53,245 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-29 06:38:53,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:38:53,440 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:38:53,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:38:53,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1588615725, now seen corresponding path program 30 times [2023-11-29 06:38:53,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:38:53,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653795417] [2023-11-29 06:38:53,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:38:53,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:38:53,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:38:53,797 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 79 proven. 90 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-29 06:38:53,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:38:53,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653795417] [2023-11-29 06:38:53,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653795417] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:38:53,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691646932] [2023-11-29 06:38:53,798 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:38:53,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:38:53,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:38:53,799 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:38:53,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-29 06:38:54,194 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-11-29 06:38:54,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:38:54,197 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-29 06:38:54,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:38:54,689 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 78 proven. 91 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-29 06:38:54,690 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:38:55,187 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 78 proven. 91 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-29 06:38:55,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691646932] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:38:55,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:38:55,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 69 [2023-11-29 06:38:55,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985176411] [2023-11-29 06:38:55,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:38:55,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2023-11-29 06:38:55,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:38:55,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2023-11-29 06:38:55,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=723, Invalid=3969, Unknown=0, NotChecked=0, Total=4692 [2023-11-29 06:38:55,190 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 69 states, 69 states have (on average 1.1884057971014492) internal successors, (82), 69 states have internal predecessors, (82), 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 06:38:55,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:38:55,952 INFO L93 Difference]: Finished difference Result 99 states and 106 transitions. [2023-11-29 06:38:55,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-11-29 06:38:55,952 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.1884057971014492) internal successors, (82), 69 states have internal predecessors, (82), 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 47 [2023-11-29 06:38:55,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:38:55,953 INFO L225 Difference]: With dead ends: 99 [2023-11-29 06:38:55,953 INFO L226 Difference]: Without dead ends: 50 [2023-11-29 06:38:55,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 43 SyntacticMatches, 14 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4764 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1689, Invalid=10083, Unknown=0, NotChecked=0, Total=11772 [2023-11-29 06:38:55,954 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 81 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 1148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:38:55,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 36 Invalid, 1148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 840 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 06:38:55,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-29 06:38:55,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-11-29 06:38:55,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 49 states have internal predecessors, (52), 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 06:38:55,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2023-11-29 06:38:55,995 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 47 [2023-11-29 06:38:55,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:38:55,995 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2023-11-29 06:38:55,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.1884057971014492) internal successors, (82), 69 states have internal predecessors, (82), 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 06:38:55,995 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2023-11-29 06:38:55,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-29 06:38:55,996 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:38:55,996 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:38:56,001 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-29 06:38:56,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-29 06:38:56,196 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:38:56,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:38:56,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1419815193, now seen corresponding path program 31 times [2023-11-29 06:38:56,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:38:56,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355435564] [2023-11-29 06:38:56,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:38:56,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:38:56,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:39:02,650 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 45 proven. 228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:39:02,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:39:02,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355435564] [2023-11-29 06:39:02,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355435564] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:39:02,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811793509] [2023-11-29 06:39:02,650 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 06:39:02,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:39:02,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:39:02,651 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:39:02,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-29 06:39:02,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:39:02,756 WARN L260 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 142 conjunts are in the unsatisfiable core [2023-11-29 06:39:02,758 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:39:03,311 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:39:06,071 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:39:06,072 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:39:10,278 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-11-29 06:39:10,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811793509] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:39:10,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:39:10,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 31] total 112 [2023-11-29 06:39:10,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642075568] [2023-11-29 06:39:10,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:39:10,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2023-11-29 06:39:10,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:39:10,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2023-11-29 06:39:10,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=11837, Unknown=0, NotChecked=0, Total=12432 [2023-11-29 06:39:10,281 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand has 112 states, 112 states have (on average 1.1071428571428572) internal successors, (124), 112 states have internal predecessors, (124), 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 06:39:17,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:39:17,615 INFO L93 Difference]: Finished difference Result 75 states and 78 transitions. [2023-11-29 06:39:17,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-29 06:39:17,616 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 1.1071428571428572) internal successors, (124), 112 states have internal predecessors, (124), 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 49 [2023-11-29 06:39:17,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:39:17,616 INFO L225 Difference]: With dead ends: 75 [2023-11-29 06:39:17,617 INFO L226 Difference]: Without dead ends: 71 [2023-11-29 06:39:17,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6381 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=1087, Invalid=22475, Unknown=0, NotChecked=0, Total=23562 [2023-11-29 06:39:17,618 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 29 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 2952 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 2975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 2952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-29 06:39:17,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 258 Invalid, 2975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 2952 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-11-29 06:39:17,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-29 06:39:17,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 53. [2023-11-29 06:39:17,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 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 06:39:17,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2023-11-29 06:39:17,672 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 49 [2023-11-29 06:39:17,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:39:17,673 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2023-11-29 06:39:17,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 1.1071428571428572) internal successors, (124), 112 states have internal predecessors, (124), 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 06:39:17,673 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2023-11-29 06:39:17,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-29 06:39:17,673 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:39:17,673 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:39:17,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-29 06:39:17,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:39:17,874 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:39:17,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:39:17,874 INFO L85 PathProgramCache]: Analyzing trace with hash 2044303257, now seen corresponding path program 32 times [2023-11-29 06:39:17,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:39:17,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951435137] [2023-11-29 06:39:17,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:39:17,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:39:17,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:39:18,297 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 92 proven. 104 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-11-29 06:39:18,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:39:18,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951435137] [2023-11-29 06:39:18,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951435137] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:39:18,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761117521] [2023-11-29 06:39:18,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:39:18,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:39:18,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:39:18,298 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:39:18,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-29 06:39:18,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:39:18,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:39:18,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 06:39:18,409 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:39:18,748 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-11-29 06:39:18,748 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:39:19,029 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-11-29 06:39:19,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761117521] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:39:19,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:39:19,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 47 [2023-11-29 06:39:19,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943362728] [2023-11-29 06:39:19,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:39:19,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-29 06:39:19,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:39:19,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-29 06:39:19,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=1647, Unknown=0, NotChecked=0, Total=2162 [2023-11-29 06:39:19,031 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand has 47 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 47 states have internal predecessors, (57), 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 06:39:19,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:39:19,443 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2023-11-29 06:39:19,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-29 06:39:19,444 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 47 states have internal predecessors, (57), 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 50 [2023-11-29 06:39:19,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:39:19,444 INFO L225 Difference]: With dead ends: 108 [2023-11-29 06:39:19,444 INFO L226 Difference]: Without dead ends: 57 [2023-11-29 06:39:19,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 57 SyntacticMatches, 27 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1668 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=872, Invalid=2788, Unknown=0, NotChecked=0, Total=3660 [2023-11-29 06:39:19,445 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 30 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:39:19,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 38 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:39:19,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-29 06:39:19,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2023-11-29 06:39:19,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 51 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 06:39:19,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2023-11-29 06:39:19,490 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 50 [2023-11-29 06:39:19,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:39:19,490 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2023-11-29 06:39:19,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 47 states have internal predecessors, (57), 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 06:39:19,491 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2023-11-29 06:39:19,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-29 06:39:19,491 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:39:19,491 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:39:19,496 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-11-29 06:39:19,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:39:19,691 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:39:19,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:39:19,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1826628216, now seen corresponding path program 33 times [2023-11-29 06:39:19,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:39:19,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744239918] [2023-11-29 06:39:19,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:39:19,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:39:19,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:39:20,086 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 78 proven. 118 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-11-29 06:39:20,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:39:20,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744239918] [2023-11-29 06:39:20,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744239918] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:39:20,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555384785] [2023-11-29 06:39:20,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:39:20,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:39:20,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:39:20,088 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:39:20,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-29 06:39:20,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-11-29 06:39:20,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:39:20,343 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 06:39:20,345 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:39:20,618 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 91 proven. 105 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-11-29 06:39:20,618 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:39:20,896 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 91 proven. 105 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-11-29 06:39:20,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555384785] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:39:20,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:39:20,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 47 [2023-11-29 06:39:20,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635381214] [2023-11-29 06:39:20,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:39:20,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-29 06:39:20,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:39:20,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-29 06:39:20,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=1647, Unknown=0, NotChecked=0, Total=2162 [2023-11-29 06:39:20,898 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 47 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 47 states have internal predecessors, (57), 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 06:39:21,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:39:21,284 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2023-11-29 06:39:21,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-29 06:39:21,284 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 47 states have internal predecessors, (57), 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 51 [2023-11-29 06:39:21,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:39:21,285 INFO L225 Difference]: With dead ends: 57 [2023-11-29 06:39:21,285 INFO L226 Difference]: Without dead ends: 53 [2023-11-29 06:39:21,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 58 SyntacticMatches, 28 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1942 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=883, Invalid=3023, Unknown=0, NotChecked=0, Total=3906 [2023-11-29 06:39:21,285 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 24 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:39:21,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 21 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:39:21,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-29 06:39:21,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-11-29 06:39:21,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 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 06:39:21,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2023-11-29 06:39:21,332 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 51 [2023-11-29 06:39:21,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:39:21,332 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2023-11-29 06:39:21,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 47 states have internal predecessors, (57), 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 06:39:21,333 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2023-11-29 06:39:21,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-29 06:39:21,333 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:39:21,333 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:39:21,338 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-11-29 06:39:21,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-11-29 06:39:21,534 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:39:21,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:39:21,534 INFO L85 PathProgramCache]: Analyzing trace with hash 814670173, now seen corresponding path program 34 times [2023-11-29 06:39:21,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:39:21,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247458055] [2023-11-29 06:39:21,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:39:21,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:39:21,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:39:25,683 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:39:25,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:39:25,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247458055] [2023-11-29 06:39:25,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247458055] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:39:25,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929946662] [2023-11-29 06:39:25,683 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:39:25,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:39:25,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:39:25,684 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:39:25,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-29 06:39:25,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:39:25,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:39:25,824 INFO L262 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 147 conjunts are in the unsatisfiable core [2023-11-29 06:39:25,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:39:26,514 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 06:39:26,583 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 25 treesize of output 24 [2023-11-29 06:39:30,207 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 91 proven. 224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:39:30,207 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:39:36,677 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 66 proven. 249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:39:36,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929946662] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:39:36,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:39:36,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 50, 50] total 142 [2023-11-29 06:39:36,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212031175] [2023-11-29 06:39:36,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:39:36,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 142 states [2023-11-29 06:39:36,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:39:36,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2023-11-29 06:39:36,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2020, Invalid=18002, Unknown=0, NotChecked=0, Total=20022 [2023-11-29 06:39:36,680 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 142 states, 142 states have (on average 1.0422535211267605) internal successors, (148), 142 states have internal predecessors, (148), 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 06:39:44,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:39:44,621 INFO L93 Difference]: Finished difference Result 79 states and 82 transitions. [2023-11-29 06:39:44,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-11-29 06:39:44,622 INFO L78 Accepts]: Start accepts. Automaton has has 142 states, 142 states have (on average 1.0422535211267605) internal successors, (148), 142 states have internal predecessors, (148), 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 52 [2023-11-29 06:39:44,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:39:44,622 INFO L225 Difference]: With dead ends: 79 [2023-11-29 06:39:44,622 INFO L226 Difference]: Without dead ends: 75 [2023-11-29 06:39:44,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8695 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=3009, Invalid=25383, Unknown=0, NotChecked=0, Total=28392 [2023-11-29 06:39:44,624 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 105 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 2561 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 2706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 2561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-29 06:39:44,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 140 Invalid, 2706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 2561 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-29 06:39:44,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-11-29 06:39:44,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2023-11-29 06:39:44,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 55 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 06:39:44,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2023-11-29 06:39:44,698 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 52 [2023-11-29 06:39:44,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:39:44,698 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2023-11-29 06:39:44,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 142 states, 142 states have (on average 1.0422535211267605) internal successors, (148), 142 states have internal predecessors, (148), 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 06:39:44,698 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2023-11-29 06:39:44,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-29 06:39:44,699 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:39:44,699 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:39:44,704 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-11-29 06:39:44,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-29 06:39:44,899 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:39:44,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:39:44,900 INFO L85 PathProgramCache]: Analyzing trace with hash 658521005, now seen corresponding path program 35 times [2023-11-29 06:39:44,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:39:44,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263746132] [2023-11-29 06:39:44,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:39:44,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:39:44,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:39:45,330 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 106 proven. 119 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-11-29 06:39:45,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:39:45,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263746132] [2023-11-29 06:39:45,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263746132] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:39:45,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600814398] [2023-11-29 06:39:45,330 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:39:45,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:39:45,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:39:45,331 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:39:45,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-29 06:39:45,828 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2023-11-29 06:39:45,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:39:45,832 INFO L262 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 06:39:45,833 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:39:46,200 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-11-29 06:39:46,200 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:39:46,514 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-11-29 06:39:46,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600814398] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:39:46,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:39:46,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 50 [2023-11-29 06:39:46,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780067401] [2023-11-29 06:39:46,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:39:46,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-11-29 06:39:46,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:39:46,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-11-29 06:39:46,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=1869, Unknown=0, NotChecked=0, Total=2450 [2023-11-29 06:39:46,516 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand has 50 states, 50 states have (on average 1.2) internal successors, (60), 50 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 06:39:46,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:39:46,971 INFO L93 Difference]: Finished difference Result 114 states and 120 transitions. [2023-11-29 06:39:46,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-29 06:39:46,971 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.2) internal successors, (60), 50 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) Word has length 53 [2023-11-29 06:39:46,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:39:46,972 INFO L225 Difference]: With dead ends: 114 [2023-11-29 06:39:46,972 INFO L226 Difference]: Without dead ends: 60 [2023-11-29 06:39:46,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 60 SyntacticMatches, 29 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1901 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=986, Invalid=3174, Unknown=0, NotChecked=0, Total=4160 [2023-11-29 06:39:46,972 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 36 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:39:46,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 29 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:39:46,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-11-29 06:39:47,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2023-11-29 06:39:47,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 54 states have internal predecessors, (57), 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 06:39:47,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2023-11-29 06:39:47,025 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 53 [2023-11-29 06:39:47,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:39:47,025 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2023-11-29 06:39:47,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.2) internal successors, (60), 50 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 06:39:47,026 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2023-11-29 06:39:47,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-29 06:39:47,026 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:39:47,026 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:39:47,031 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-11-29 06:39:47,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:39:47,226 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:39:47,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:39:47,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1301991534, now seen corresponding path program 36 times [2023-11-29 06:39:47,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:39:47,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947644685] [2023-11-29 06:39:47,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:39:47,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:39:47,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:39:47,701 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 91 proven. 134 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-11-29 06:39:47,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:39:47,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947644685] [2023-11-29 06:39:47,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947644685] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:39:47,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200151511] [2023-11-29 06:39:47,701 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:39:47,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:39:47,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:39:47,702 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:39:47,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-29 06:39:48,218 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-11-29 06:39:48,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:39:48,222 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 06:39:48,223 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:39:48,519 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 105 proven. 120 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-11-29 06:39:48,519 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:39:48,848 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 105 proven. 120 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-11-29 06:39:48,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200151511] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:39:48,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:39:48,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 50 [2023-11-29 06:39:48,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193005743] [2023-11-29 06:39:48,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:39:48,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-11-29 06:39:48,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:39:48,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-11-29 06:39:48,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=1869, Unknown=0, NotChecked=0, Total=2450 [2023-11-29 06:39:48,851 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand has 50 states, 50 states have (on average 1.2) internal successors, (60), 50 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 06:39:49,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:39:49,221 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2023-11-29 06:39:49,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-29 06:39:49,222 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.2) internal successors, (60), 50 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) Word has length 54 [2023-11-29 06:39:49,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:39:49,222 INFO L225 Difference]: With dead ends: 60 [2023-11-29 06:39:49,222 INFO L226 Difference]: Without dead ends: 56 [2023-11-29 06:39:49,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 61 SyntacticMatches, 30 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2217 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=997, Invalid=3425, Unknown=0, NotChecked=0, Total=4422 [2023-11-29 06:39:49,223 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 36 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:39:49,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 15 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:39:49,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-29 06:39:49,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2023-11-29 06:39:49,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 55 states have internal predecessors, (58), 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 06:39:49,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2023-11-29 06:39:49,277 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 54 [2023-11-29 06:39:49,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:39:49,278 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2023-11-29 06:39:49,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.2) internal successors, (60), 50 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 06:39:49,278 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2023-11-29 06:39:49,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-29 06:39:49,278 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:39:49,278 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:39:49,283 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-11-29 06:39:49,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-29 06:39:49,478 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:39:49,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:39:49,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1730802215, now seen corresponding path program 37 times [2023-11-29 06:39:49,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:39:49,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946562722] [2023-11-29 06:39:49,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:39:49,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:39:49,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:39:53,999 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:39:53,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:39:53,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946562722] [2023-11-29 06:39:53,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946562722] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:39:53,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324843724] [2023-11-29 06:39:53,999 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 06:39:54,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:39:54,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:39:54,000 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:39:54,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-29 06:39:54,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:39:54,133 WARN L260 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 162 conjunts are in the unsatisfiable core [2023-11-29 06:39:54,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:39:54,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:39:56,240 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:39:56,240 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:40:02,279 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-11-29 06:40:02,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324843724] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:40:02,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:40:02,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 35] total 103 [2023-11-29 06:40:02,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132525644] [2023-11-29 06:40:02,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:40:02,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2023-11-29 06:40:02,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:40:02,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2023-11-29 06:40:02,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=10114, Unknown=0, NotChecked=0, Total=10506 [2023-11-29 06:40:02,281 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand has 103 states, 103 states have (on average 1.1262135922330097) internal successors, (116), 103 states have internal predecessors, (116), 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 06:40:07,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:40:07,143 INFO L93 Difference]: Finished difference Result 78 states and 81 transitions. [2023-11-29 06:40:07,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-11-29 06:40:07,144 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.1262135922330097) internal successors, (116), 103 states have internal predecessors, (116), 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 55 [2023-11-29 06:40:07,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:40:07,144 INFO L225 Difference]: With dead ends: 78 [2023-11-29 06:40:07,144 INFO L226 Difference]: Without dead ends: 74 [2023-11-29 06:40:07,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2317 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=582, Invalid=13460, Unknown=0, NotChecked=0, Total=14042 [2023-11-29 06:40:07,145 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 3438 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 3444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 3438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:40:07,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 138 Invalid, 3444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 3438 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-11-29 06:40:07,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-29 06:40:07,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 59. [2023-11-29 06:40:07,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 58 states have internal predecessors, (62), 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 06:40:07,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2023-11-29 06:40:07,208 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 55 [2023-11-29 06:40:07,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:40:07,209 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2023-11-29 06:40:07,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.1262135922330097) internal successors, (116), 103 states have internal predecessors, (116), 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 06:40:07,209 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2023-11-29 06:40:07,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-29 06:40:07,209 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:40:07,209 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:40:07,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-11-29 06:40:07,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-29 06:40:07,410 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:40:07,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:40:07,410 INFO L85 PathProgramCache]: Analyzing trace with hash -872522343, now seen corresponding path program 38 times [2023-11-29 06:40:07,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:40:07,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81079037] [2023-11-29 06:40:07,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:40:07,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:40:07,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:40:07,914 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 121 proven. 135 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-11-29 06:40:07,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:40:07,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81079037] [2023-11-29 06:40:07,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81079037] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:40:07,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642197240] [2023-11-29 06:40:07,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:40:07,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:40:07,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:40:07,915 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:40:07,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-11-29 06:40:08,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:40:08,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:40:08,035 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-29 06:40:08,036 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:40:08,456 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-11-29 06:40:08,456 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:40:08,778 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-11-29 06:40:08,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642197240] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:40:08,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:40:08,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 53 [2023-11-29 06:40:08,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762472951] [2023-11-29 06:40:08,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:40:08,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-29 06:40:08,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:40:08,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-29 06:40:08,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=651, Invalid=2105, Unknown=0, NotChecked=0, Total=2756 [2023-11-29 06:40:08,780 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 53 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 53 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 06:40:09,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:40:09,256 INFO L93 Difference]: Finished difference Result 120 states and 126 transitions. [2023-11-29 06:40:09,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-29 06:40:09,256 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 53 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 56 [2023-11-29 06:40:09,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:40:09,257 INFO L225 Difference]: With dead ends: 120 [2023-11-29 06:40:09,257 INFO L226 Difference]: Without dead ends: 63 [2023-11-29 06:40:09,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 63 SyntacticMatches, 31 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2149 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1107, Invalid=3585, Unknown=0, NotChecked=0, Total=4692 [2023-11-29 06:40:09,258 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 37 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:40:09,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 38 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:40:09,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-29 06:40:09,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 58. [2023-11-29 06:40:09,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 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 06:40:09,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2023-11-29 06:40:09,318 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 56 [2023-11-29 06:40:09,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:40:09,318 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2023-11-29 06:40:09,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 53 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 06:40:09,318 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2023-11-29 06:40:09,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-29 06:40:09,319 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:40:09,319 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:40:09,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-11-29 06:40:09,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-11-29 06:40:09,519 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:40:09,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:40:09,520 INFO L85 PathProgramCache]: Analyzing trace with hash 318965048, now seen corresponding path program 39 times [2023-11-29 06:40:09,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:40:09,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85254376] [2023-11-29 06:40:09,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:40:09,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:40:09,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:40:10,086 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 105 proven. 151 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-11-29 06:40:10,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:40:10,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85254376] [2023-11-29 06:40:10,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85254376] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:40:10,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184351993] [2023-11-29 06:40:10,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:40:10,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:40:10,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:40:10,087 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:40:10,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-11-29 06:40:10,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-11-29 06:40:10,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:40:10,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-29 06:40:10,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:40:10,719 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 120 proven. 136 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-11-29 06:40:10,719 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:40:11,077 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 120 proven. 136 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-11-29 06:40:11,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184351993] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:40:11,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:40:11,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 53 [2023-11-29 06:40:11,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754091648] [2023-11-29 06:40:11,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:40:11,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-29 06:40:11,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:40:11,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-29 06:40:11,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=651, Invalid=2105, Unknown=0, NotChecked=0, Total=2756 [2023-11-29 06:40:11,079 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand has 53 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 53 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 06:40:11,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:40:11,541 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2023-11-29 06:40:11,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-29 06:40:11,542 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 53 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 57 [2023-11-29 06:40:11,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:40:11,543 INFO L225 Difference]: With dead ends: 63 [2023-11-29 06:40:11,543 INFO L226 Difference]: Without dead ends: 59 [2023-11-29 06:40:11,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 64 SyntacticMatches, 32 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2510 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1118, Invalid=3852, Unknown=0, NotChecked=0, Total=4970 [2023-11-29 06:40:11,543 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 24 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:40:11,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 15 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:40:11,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-11-29 06:40:11,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2023-11-29 06:40:11,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 58 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:40:11,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2023-11-29 06:40:11,605 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 57 [2023-11-29 06:40:11,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:40:11,605 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2023-11-29 06:40:11,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 53 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 06:40:11,605 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2023-11-29 06:40:11,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-29 06:40:11,605 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:40:11,606 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:40:11,612 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-11-29 06:40:11,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:40:11,806 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:40:11,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:40:11,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1321752221, now seen corresponding path program 40 times [2023-11-29 06:40:11,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:40:11,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956273091] [2023-11-29 06:40:11,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:40:11,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:40:11,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:40:17,088 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:40:17,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:40:17,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956273091] [2023-11-29 06:40:17,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956273091] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:40:17,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388513469] [2023-11-29 06:40:17,089 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:40:17,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:40:17,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:40:17,090 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:40:17,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-11-29 06:40:17,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:40:17,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:40:17,256 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 140 conjunts are in the unsatisfiable core [2023-11-29 06:40:17,259 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:40:21,194 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-11-29 06:40:21,194 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:40:37,745 WARN L293 SmtUtils]: Spent 8.68s on a formula simplification that was a NOOP. DAG size: 864 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-11-29 06:40:37,746 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:40:37,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 32 select indices, 32 select index equivalence classes, 0 disjoint index pairs (out of 496 index pairs), introduced 32 new quantified variables, introduced 496 case distinctions, treesize of input 273 treesize of output 2325 [2023-11-29 06:46:38,882 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-11-29 06:46:38,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388513469] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:46:38,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:46:38,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 38, 37] total 122 [2023-11-29 06:46:38,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633991780] [2023-11-29 06:46:38,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:46:38,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2023-11-29 06:46:38,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:46:38,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2023-11-29 06:46:38,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=14275, Unknown=0, NotChecked=0, Total=14762 [2023-11-29 06:46:38,884 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand has 122 states, 122 states have (on average 1.1147540983606556) internal successors, (136), 122 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:46:45,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:46:45,933 INFO L93 Difference]: Finished difference Result 82 states and 85 transitions. [2023-11-29 06:46:45,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-11-29 06:46:45,934 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 1.1147540983606556) internal successors, (136), 122 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2023-11-29 06:46:45,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:46:45,934 INFO L225 Difference]: With dead ends: 82 [2023-11-29 06:46:45,934 INFO L226 Difference]: Without dead ends: 78 [2023-11-29 06:46:45,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3294 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=725, Invalid=19867, Unknown=0, NotChecked=0, Total=20592 [2023-11-29 06:46:45,936 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 3856 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 3861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 3856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-11-29 06:46:45,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 136 Invalid, 3861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 3856 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-11-29 06:46:45,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-11-29 06:46:46,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2023-11-29 06:46:46,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 61 states have internal predecessors, (65), 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 06:46:46,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2023-11-29 06:46:46,007 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 58 [2023-11-29 06:46:46,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:46:46,008 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2023-11-29 06:46:46,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 1.1147540983606556) internal successors, (136), 122 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:46:46,008 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2023-11-29 06:46:46,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-29 06:46:46,008 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:46:46,008 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:46:46,014 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-11-29 06:46:46,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:46:46,209 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:46:46,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:46:46,209 INFO L85 PathProgramCache]: Analyzing trace with hash -820470483, now seen corresponding path program 41 times [2023-11-29 06:46:46,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:46:46,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212555290] [2023-11-29 06:46:46,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:46:46,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:46:46,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:46:46,765 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 137 proven. 152 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-11-29 06:46:46,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:46:46,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212555290] [2023-11-29 06:46:46,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212555290] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:46:46,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462943877] [2023-11-29 06:46:46,766 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:46:46,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:46:46,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:46:46,767 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:46:46,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-11-29 06:46:47,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-11-29 06:46:47,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:46:47,914 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-29 06:46:47,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:46:48,455 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-11-29 06:46:48,455 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:46:48,880 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-11-29 06:46:48,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462943877] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:46:48,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:46:48,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 56 [2023-11-29 06:46:48,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386264090] [2023-11-29 06:46:48,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:46:48,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-11-29 06:46:48,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:46:48,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-11-29 06:46:48,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=725, Invalid=2355, Unknown=0, NotChecked=0, Total=3080 [2023-11-29 06:46:48,882 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand has 56 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 56 states have internal predecessors, (66), 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 06:46:49,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:46:49,458 INFO L93 Difference]: Finished difference Result 126 states and 132 transitions. [2023-11-29 06:46:49,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-29 06:46:49,458 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 56 states have internal predecessors, (66), 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 59 [2023-11-29 06:46:49,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:46:49,458 INFO L225 Difference]: With dead ends: 126 [2023-11-29 06:46:49,459 INFO L226 Difference]: Without dead ends: 66 [2023-11-29 06:46:49,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 66 SyntacticMatches, 33 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2412 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1235, Invalid=4021, Unknown=0, NotChecked=0, Total=5256 [2023-11-29 06:46:49,459 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 31 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:46:49,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 38 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:46:49,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-29 06:46:49,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2023-11-29 06:46:49,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.05) internal successors, (63), 60 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 06:46:49,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2023-11-29 06:46:49,533 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 59 [2023-11-29 06:46:49,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:46:49,533 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2023-11-29 06:46:49,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 56 states have internal predecessors, (66), 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 06:46:49,534 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2023-11-29 06:46:49,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-29 06:46:49,534 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:46:49,534 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:46:49,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-11-29 06:46:49,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-11-29 06:46:49,734 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:46:49,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:46:49,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1170660654, now seen corresponding path program 42 times [2023-11-29 06:46:49,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:46:49,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657746566] [2023-11-29 06:46:49,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:46:49,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:46:49,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:46:50,330 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 120 proven. 169 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-11-29 06:46:50,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:46:50,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657746566] [2023-11-29 06:46:50,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657746566] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:46:50,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996276408] [2023-11-29 06:46:50,331 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:46:50,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:46:50,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:46:50,332 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:46:50,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-11-29 06:46:51,037 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2023-11-29 06:46:51,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:46:51,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-29 06:46:51,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:46:51,410 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 136 proven. 153 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-11-29 06:46:51,410 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:46:51,835 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 136 proven. 153 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-11-29 06:46:51,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996276408] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:46:51,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:46:51,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 56 [2023-11-29 06:46:51,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364095138] [2023-11-29 06:46:51,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:46:51,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-11-29 06:46:51,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:46:51,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-11-29 06:46:51,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=725, Invalid=2355, Unknown=0, NotChecked=0, Total=3080 [2023-11-29 06:46:51,838 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand has 56 states, 56 states have (on average 1.5178571428571428) internal successors, (85), 56 states have internal predecessors, (85), 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 06:46:52,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:46:52,369 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2023-11-29 06:46:52,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-29 06:46:52,369 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.5178571428571428) internal successors, (85), 56 states have internal predecessors, (85), 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 60 [2023-11-29 06:46:52,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:46:52,370 INFO L225 Difference]: With dead ends: 66 [2023-11-29 06:46:52,370 INFO L226 Difference]: Without dead ends: 62 [2023-11-29 06:46:52,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 68 SyntacticMatches, 34 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2821 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1246, Invalid=4304, Unknown=0, NotChecked=0, Total=5550 [2023-11-29 06:46:52,371 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 54 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:46:52,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 21 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:46:52,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-29 06:46:52,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-11-29 06:46:52,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 61 states have internal predecessors, (64), 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 06:46:52,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2023-11-29 06:46:52,464 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 60 [2023-11-29 06:46:52,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:46:52,464 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2023-11-29 06:46:52,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.5178571428571428) internal successors, (85), 56 states have internal predecessors, (85), 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 06:46:52,464 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2023-11-29 06:46:52,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-29 06:46:52,465 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:46:52,465 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:46:52,470 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2023-11-29 06:46:52,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-11-29 06:46:52,665 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:46:52,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:46:52,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1954512231, now seen corresponding path program 43 times [2023-11-29 06:46:52,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:46:52,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747975829] [2023-11-29 06:46:52,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:46:52,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:46:52,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:47:05,898 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 45 proven. 414 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:47:05,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:47:05,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747975829] [2023-11-29 06:47:05,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747975829] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:47:05,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748291881] [2023-11-29 06:47:05,898 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 06:47:05,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:47:05,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:47:05,899 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:47:05,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-11-29 06:47:06,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:47:06,057 WARN L260 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 182 conjunts are in the unsatisfiable core [2023-11-29 06:47:06,060 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:47:07,266 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 06:47:12,529 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:47:12,529 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:47:22,450 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-11-29 06:47:22,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748291881] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:47:22,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:47:22,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57, 39] total 145 [2023-11-29 06:47:22,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400296169] [2023-11-29 06:47:22,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:47:22,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2023-11-29 06:47:22,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:47:22,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2023-11-29 06:47:22,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=738, Invalid=20142, Unknown=0, NotChecked=0, Total=20880 [2023-11-29 06:47:22,453 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand has 145 states, 145 states have (on average 1.0827586206896551) internal successors, (157), 145 states have internal predecessors, (157), 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 06:47:34,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:47:34,899 INFO L93 Difference]: Finished difference Result 91 states and 94 transitions. [2023-11-29 06:47:34,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-11-29 06:47:34,899 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 1.0827586206896551) internal successors, (157), 145 states have internal predecessors, (157), 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 61 [2023-11-29 06:47:34,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:47:34,900 INFO L225 Difference]: With dead ends: 91 [2023-11-29 06:47:34,900 INFO L226 Difference]: Without dead ends: 87 [2023-11-29 06:47:34,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8953 ImplicationChecksByTransitivity, 27.1s TimeCoverageRelationStatistics Valid=1240, Invalid=31340, Unknown=0, NotChecked=0, Total=32580 [2023-11-29 06:47:34,903 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 39 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 4524 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 4552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 4524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:47:34,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 307 Invalid, 4552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 4524 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2023-11-29 06:47:34,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-11-29 06:47:34,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 65. [2023-11-29 06:47:34,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.0625) internal successors, (68), 64 states have internal predecessors, (68), 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 06:47:34,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2023-11-29 06:47:34,999 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 61 [2023-11-29 06:47:34,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:47:34,999 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2023-11-29 06:47:34,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 145 states have (on average 1.0827586206896551) internal successors, (157), 145 states have internal predecessors, (157), 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 06:47:34,999 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2023-11-29 06:47:35,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-29 06:47:35,000 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:47:35,000 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:47:35,005 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2023-11-29 06:47:35,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-11-29 06:47:35,200 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:47:35,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:47:35,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1188881305, now seen corresponding path program 44 times [2023-11-29 06:47:35,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:47:35,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587849039] [2023-11-29 06:47:35,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:47:35,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:47:35,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:47:35,828 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 154 proven. 170 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-11-29 06:47:35,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:47:35,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587849039] [2023-11-29 06:47:35,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587849039] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:47:35,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815220797] [2023-11-29 06:47:35,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:47:35,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:47:35,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:47:35,830 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:47:35,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-11-29 06:47:35,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:47:35,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:47:35,976 INFO L262 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-29 06:47:35,979 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:47:36,553 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-11-29 06:47:36,554 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:47:36,992 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-11-29 06:47:36,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815220797] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:47:36,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:47:36,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 59 [2023-11-29 06:47:36,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951094530] [2023-11-29 06:47:36,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:47:36,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-11-29 06:47:36,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:47:36,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-11-29 06:47:36,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=803, Invalid=2619, Unknown=0, NotChecked=0, Total=3422 [2023-11-29 06:47:36,994 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand has 59 states, 59 states have (on average 1.1694915254237288) internal successors, (69), 59 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 06:47:37,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:47:37,657 INFO L93 Difference]: Finished difference Result 132 states and 138 transitions. [2023-11-29 06:47:37,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-29 06:47:37,657 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.1694915254237288) internal successors, (69), 59 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 62 [2023-11-29 06:47:37,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:47:37,658 INFO L225 Difference]: With dead ends: 132 [2023-11-29 06:47:37,658 INFO L226 Difference]: Without dead ends: 69 [2023-11-29 06:47:37,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 69 SyntacticMatches, 35 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2690 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1370, Invalid=4482, Unknown=0, NotChecked=0, Total=5852 [2023-11-29 06:47:37,659 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 26 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:47:37,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 35 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 06:47:37,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-11-29 06:47:37,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 64. [2023-11-29 06:47:37,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 63 states have internal predecessors, (66), 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 06:47:37,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2023-11-29 06:47:37,747 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 62 [2023-11-29 06:47:37,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:47:37,747 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2023-11-29 06:47:37,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.1694915254237288) internal successors, (69), 59 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 06:47:37,747 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2023-11-29 06:47:37,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-29 06:47:37,747 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:47:37,747 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:47:37,752 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2023-11-29 06:47:37,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-11-29 06:47:37,948 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:47:37,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:47:37,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1183258616, now seen corresponding path program 45 times [2023-11-29 06:47:37,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:47:37,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081928636] [2023-11-29 06:47:37,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:47:37,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:47:37,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:47:38,629 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 136 proven. 188 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2023-11-29 06:47:38,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:47:38,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081928636] [2023-11-29 06:47:38,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081928636] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:47:38,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611554359] [2023-11-29 06:47:38,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:47:38,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:47:38,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:47:38,631 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:47:38,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-11-29 06:47:39,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-11-29 06:47:39,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:47:39,036 INFO L262 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-29 06:47:39,037 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:47:39,501 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 153 proven. 171 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2023-11-29 06:47:39,502 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:47:40,023 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 153 proven. 171 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2023-11-29 06:47:40,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611554359] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:47:40,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:47:40,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 59 [2023-11-29 06:47:40,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248521845] [2023-11-29 06:47:40,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:47:40,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-11-29 06:47:40,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:47:40,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-11-29 06:47:40,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=803, Invalid=2619, Unknown=0, NotChecked=0, Total=3422 [2023-11-29 06:47:40,025 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand has 59 states, 59 states have (on average 1.1694915254237288) internal successors, (69), 59 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 06:47:40,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:47:40,605 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2023-11-29 06:47:40,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-29 06:47:40,605 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.1694915254237288) internal successors, (69), 59 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 63 [2023-11-29 06:47:40,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:47:40,606 INFO L225 Difference]: With dead ends: 69 [2023-11-29 06:47:40,606 INFO L226 Difference]: Without dead ends: 65 [2023-11-29 06:47:40,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 70 SyntacticMatches, 36 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3150 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1381, Invalid=4781, Unknown=0, NotChecked=0, Total=6162 [2023-11-29 06:47:40,607 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 18 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:47:40,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 33 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 06:47:40,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-29 06:47:40,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2023-11-29 06:47:40,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.046875) internal successors, (67), 64 states have internal predecessors, (67), 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 06:47:40,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2023-11-29 06:47:40,688 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 63 [2023-11-29 06:47:40,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:47:40,688 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2023-11-29 06:47:40,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.1694915254237288) internal successors, (69), 59 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 06:47:40,688 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2023-11-29 06:47:40,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-29 06:47:40,688 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:47:40,688 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:47:40,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2023-11-29 06:47:40,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-11-29 06:47:40,889 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:47:40,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:47:40,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1949918243, now seen corresponding path program 46 times [2023-11-29 06:47:40,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:47:40,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354737993] [2023-11-29 06:47:40,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:47:40,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:47:40,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:47:53,498 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 120 proven. 393 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:47:53,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:47:53,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354737993] [2023-11-29 06:47:53,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354737993] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:47:53,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524855504] [2023-11-29 06:47:53,499 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:47:53,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:47:53,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:47:53,500 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:47:53,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-11-29 06:47:53,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:47:53,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:47:53,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 156 conjunts are in the unsatisfiable core [2023-11-29 06:47:53,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:47:53,984 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 06:48:04,469 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 18 proven. 342 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-11-29 06:48:04,469 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:48:14,069 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2023-11-29 06:48:14,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524855504] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:48:14,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:48:14,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 43, 41] total 138 [2023-11-29 06:48:14,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689329525] [2023-11-29 06:48:14,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:48:14,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2023-11-29 06:48:14,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:48:14,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2023-11-29 06:48:14,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=937, Invalid=17968, Unknown=1, NotChecked=0, Total=18906 [2023-11-29 06:48:14,073 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand has 138 states, 138 states have (on average 1.0942028985507246) internal successors, (151), 138 states have internal predecessors, (151), 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 06:48:29,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:48:29,561 INFO L93 Difference]: Finished difference Result 95 states and 98 transitions. [2023-11-29 06:48:29,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-11-29 06:48:29,562 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 1.0942028985507246) internal successors, (151), 138 states have internal predecessors, (151), 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 64 [2023-11-29 06:48:29,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:48:29,562 INFO L225 Difference]: With dead ends: 95 [2023-11-29 06:48:29,562 INFO L226 Difference]: Without dead ends: 91 [2023-11-29 06:48:29,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9431 ImplicationChecksByTransitivity, 33.0s TimeCoverageRelationStatistics Valid=1913, Invalid=32126, Unknown=1, NotChecked=0, Total=34040 [2023-11-29 06:48:29,564 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 29 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 4551 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 4572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 4551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2023-11-29 06:48:29,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 302 Invalid, 4572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 4551 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2023-11-29 06:48:29,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-11-29 06:48:29,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2023-11-29 06:48:29,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 67 states have internal predecessors, (71), 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 06:48:29,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2023-11-29 06:48:29,659 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 64 [2023-11-29 06:48:29,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:48:29,660 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2023-11-29 06:48:29,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 1.0942028985507246) internal successors, (151), 138 states have internal predecessors, (151), 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 06:48:29,660 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2023-11-29 06:48:29,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-29 06:48:29,660 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:48:29,660 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:48:29,666 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2023-11-29 06:48:29,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-11-29 06:48:29,861 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:48:29,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:48:29,861 INFO L85 PathProgramCache]: Analyzing trace with hash 79003309, now seen corresponding path program 47 times [2023-11-29 06:48:29,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:48:29,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623186648] [2023-11-29 06:48:29,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:48:29,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:48:29,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:48:30,676 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 172 proven. 189 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2023-11-29 06:48:30,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:48:30,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623186648] [2023-11-29 06:48:30,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623186648] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:48:30,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036439548] [2023-11-29 06:48:30,676 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:48:30,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:48:30,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:48:30,677 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:48:30,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-11-29 06:48:31,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2023-11-29 06:48:31,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:48:31,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-29 06:48:31,367 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:48:32,001 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2023-11-29 06:48:32,001 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:48:32,487 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2023-11-29 06:48:32,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036439548] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:48:32,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:48:32,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 62 [2023-11-29 06:48:32,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106712755] [2023-11-29 06:48:32,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:48:32,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-11-29 06:48:32,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:48:32,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-11-29 06:48:32,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=885, Invalid=2897, Unknown=0, NotChecked=0, Total=3782 [2023-11-29 06:48:32,489 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand has 62 states, 62 states have (on average 1.1612903225806452) internal successors, (72), 62 states have internal predecessors, (72), 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 06:48:33,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:48:33,134 INFO L93 Difference]: Finished difference Result 138 states and 144 transitions. [2023-11-29 06:48:33,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-29 06:48:33,134 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.1612903225806452) internal successors, (72), 62 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2023-11-29 06:48:33,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:48:33,135 INFO L225 Difference]: With dead ends: 138 [2023-11-29 06:48:33,135 INFO L226 Difference]: Without dead ends: 72 [2023-11-29 06:48:33,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 72 SyntacticMatches, 37 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2983 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1512, Invalid=4968, Unknown=0, NotChecked=0, Total=6480 [2023-11-29 06:48:33,136 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 28 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:48:33,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 35 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 06:48:33,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-11-29 06:48:33,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 67. [2023-11-29 06:48:33,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 66 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 06:48:33,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2023-11-29 06:48:33,228 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 65 [2023-11-29 06:48:33,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:48:33,228 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2023-11-29 06:48:33,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.1612903225806452) internal successors, (72), 62 states have internal predecessors, (72), 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 06:48:33,228 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2023-11-29 06:48:33,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-29 06:48:33,229 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:48:33,229 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:48:33,235 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2023-11-29 06:48:33,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-11-29 06:48:33,429 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:48:33,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:48:33,429 INFO L85 PathProgramCache]: Analyzing trace with hash 77199854, now seen corresponding path program 48 times [2023-11-29 06:48:33,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:48:33,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564223470] [2023-11-29 06:48:33,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:48:33,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:48:33,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:48:34,178 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 153 proven. 208 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-11-29 06:48:34,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:48:34,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564223470] [2023-11-29 06:48:34,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564223470] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:48:34,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099022267] [2023-11-29 06:48:34,178 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:48:34,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:48:34,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:48:34,179 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:48:34,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-11-29 06:48:35,041 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2023-11-29 06:48:35,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:48:35,046 INFO L262 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-29 06:48:35,048 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:48:35,518 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 171 proven. 190 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-11-29 06:48:35,518 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:48:36,061 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 171 proven. 190 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-11-29 06:48:36,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099022267] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:48:36,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:48:36,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 62 [2023-11-29 06:48:36,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403694052] [2023-11-29 06:48:36,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:48:36,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-11-29 06:48:36,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:48:36,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-11-29 06:48:36,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=885, Invalid=2897, Unknown=0, NotChecked=0, Total=3782 [2023-11-29 06:48:36,063 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand has 62 states, 62 states have (on average 1.1612903225806452) internal successors, (72), 62 states have internal predecessors, (72), 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 06:48:36,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:48:36,719 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2023-11-29 06:48:36,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-29 06:48:36,719 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.1612903225806452) internal successors, (72), 62 states have internal predecessors, (72), 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 66 [2023-11-29 06:48:36,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:48:36,720 INFO L225 Difference]: With dead ends: 72 [2023-11-29 06:48:36,720 INFO L226 Difference]: Without dead ends: 68 [2023-11-29 06:48:36,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 73 SyntacticMatches, 38 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3497 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1523, Invalid=5283, Unknown=0, NotChecked=0, Total=6806 [2023-11-29 06:48:36,720 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 30 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:48:36,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 39 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 06:48:36,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-11-29 06:48:36,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2023-11-29 06:48:36,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.044776119402985) internal successors, (70), 67 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 06:48:36,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2023-11-29 06:48:36,846 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 66 [2023-11-29 06:48:36,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:48:36,846 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2023-11-29 06:48:36,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.1612903225806452) internal successors, (72), 62 states have internal predecessors, (72), 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 06:48:36,846 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2023-11-29 06:48:36,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-29 06:48:36,846 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:48:36,847 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:48:36,852 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2023-11-29 06:48:37,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:48:37,047 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:48:37,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:48:37,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1878001497, now seen corresponding path program 49 times [2023-11-29 06:48:37,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:48:37,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194999402] [2023-11-29 06:48:37,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:48:37,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:48:37,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:48:52,298 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 120 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:48:52,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:48:52,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194999402] [2023-11-29 06:48:52,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194999402] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:48:52,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461805858] [2023-11-29 06:48:52,299 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 06:48:52,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:48:52,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:48:52,299 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:48:52,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-11-29 06:48:52,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:48:52,469 WARN L260 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 202 conjunts are in the unsatisfiable core [2023-11-29 06:48:52,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:48:53,853 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 06:49:00,522 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:49:00,523 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:49:11,531 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-11-29 06:49:11,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461805858] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:49:11,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:49:11,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 63, 43] total 161 [2023-11-29 06:49:11,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212063187] [2023-11-29 06:49:11,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:49:11,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 161 states [2023-11-29 06:49:11,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:49:11,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2023-11-29 06:49:11,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1187, Invalid=24573, Unknown=0, NotChecked=0, Total=25760 [2023-11-29 06:49:11,533 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand has 161 states, 161 states have (on average 1.0745341614906831) internal successors, (173), 161 states have internal predecessors, (173), 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 06:49:28,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:49:28,388 INFO L93 Difference]: Finished difference Result 99 states and 102 transitions. [2023-11-29 06:49:28,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-11-29 06:49:28,389 INFO L78 Accepts]: Start accepts. Automaton has has 161 states, 161 states have (on average 1.0745341614906831) internal successors, (173), 161 states have internal predecessors, (173), 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 67 [2023-11-29 06:49:28,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:49:28,389 INFO L225 Difference]: With dead ends: 99 [2023-11-29 06:49:28,389 INFO L226 Difference]: Without dead ends: 95 [2023-11-29 06:49:28,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12648 ImplicationChecksByTransitivity, 33.7s TimeCoverageRelationStatistics Valid=2085, Invalid=41805, Unknown=0, NotChecked=0, Total=43890 [2023-11-29 06:49:28,391 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 75 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 5294 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 5346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 5294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:49:28,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 311 Invalid, 5346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 5294 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2023-11-29 06:49:28,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-11-29 06:49:28,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 71. [2023-11-29 06:49:28,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 70 states have internal predecessors, (74), 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 06:49:28,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2023-11-29 06:49:28,497 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 67 [2023-11-29 06:49:28,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:49:28,497 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2023-11-29 06:49:28,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 161 states, 161 states have (on average 1.0745341614906831) internal successors, (173), 161 states have internal predecessors, (173), 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 06:49:28,498 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2023-11-29 06:49:28,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-29 06:49:28,498 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:49:28,498 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:49:28,503 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2023-11-29 06:49:28,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:49:28,698 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:49:28,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:49:28,699 INFO L85 PathProgramCache]: Analyzing trace with hash 618211737, now seen corresponding path program 50 times [2023-11-29 06:49:28,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:49:28,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268196691] [2023-11-29 06:49:28,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:49:28,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:49:28,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:49:29,508 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 191 proven. 209 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-11-29 06:49:29,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:49:29,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268196691] [2023-11-29 06:49:29,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268196691] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:49:29,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034358363] [2023-11-29 06:49:29,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:49:29,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:49:29,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:49:29,510 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:49:29,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-11-29 06:49:29,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:49:29,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:49:29,679 INFO L262 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-29 06:49:29,681 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:49:30,382 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-11-29 06:49:30,382 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:49:30,930 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-11-29 06:49:30,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034358363] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:49:30,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:49:30,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 65 [2023-11-29 06:49:30,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404640114] [2023-11-29 06:49:30,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:49:30,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-11-29 06:49:30,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:49:30,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-11-29 06:49:30,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=971, Invalid=3189, Unknown=0, NotChecked=0, Total=4160 [2023-11-29 06:49:30,932 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand has 65 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 65 states have internal predecessors, (75), 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 06:49:31,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:49:31,797 INFO L93 Difference]: Finished difference Result 144 states and 150 transitions. [2023-11-29 06:49:31,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-29 06:49:31,798 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 65 states have internal predecessors, (75), 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 68 [2023-11-29 06:49:31,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:49:31,798 INFO L225 Difference]: With dead ends: 144 [2023-11-29 06:49:31,798 INFO L226 Difference]: Without dead ends: 75 [2023-11-29 06:49:31,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 75 SyntacticMatches, 39 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3291 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1661, Invalid=5479, Unknown=0, NotChecked=0, Total=7140 [2023-11-29 06:49:31,799 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 46 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 562 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 562 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:49:31,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 35 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [562 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 06:49:31,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-11-29 06:49:31,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2023-11-29 06:49:31,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 69 states have internal predecessors, (72), 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 06:49:31,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2023-11-29 06:49:31,926 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 68 [2023-11-29 06:49:31,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:49:31,926 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2023-11-29 06:49:31,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 65 states have internal predecessors, (75), 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 06:49:31,926 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2023-11-29 06:49:31,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-29 06:49:31,927 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:49:31,927 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:49:31,931 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2023-11-29 06:49:32,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:49:32,127 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:49:32,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:49:32,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1568908616, now seen corresponding path program 51 times [2023-11-29 06:49:32,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:49:32,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247769788] [2023-11-29 06:49:32,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:49:32,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:49:32,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:49:33,034 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 171 proven. 229 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2023-11-29 06:49:33,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:49:33,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247769788] [2023-11-29 06:49:33,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247769788] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:49:33,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880315642] [2023-11-29 06:49:33,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:49:33,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:49:33,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:49:33,035 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:49:33,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-11-29 06:49:33,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-11-29 06:49:33,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:49:33,668 INFO L262 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-29 06:49:33,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:49:34,181 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 190 proven. 210 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2023-11-29 06:49:34,182 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:49:34,777 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 190 proven. 210 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2023-11-29 06:49:34,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880315642] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:49:34,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:49:34,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 65 [2023-11-29 06:49:34,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084127278] [2023-11-29 06:49:34,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:49:34,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-11-29 06:49:34,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:49:34,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-11-29 06:49:34,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=971, Invalid=3189, Unknown=0, NotChecked=0, Total=4160 [2023-11-29 06:49:34,779 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand has 65 states, 65 states have (on average 1.4923076923076923) internal successors, (97), 65 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 06:49:35,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:49:35,409 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2023-11-29 06:49:35,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-11-29 06:49:35,409 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.4923076923076923) internal successors, (97), 65 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 69 [2023-11-29 06:49:35,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:49:35,410 INFO L225 Difference]: With dead ends: 75 [2023-11-29 06:49:35,410 INFO L226 Difference]: Without dead ends: 71 [2023-11-29 06:49:35,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 77 SyntacticMatches, 40 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3862 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1672, Invalid=5810, Unknown=0, NotChecked=0, Total=7482 [2023-11-29 06:49:35,411 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 18 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:49:35,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 21 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 06:49:35,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-29 06:49:35,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2023-11-29 06:49:35,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.042857142857143) internal successors, (73), 70 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 06:49:35,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2023-11-29 06:49:35,524 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 69 [2023-11-29 06:49:35,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:49:35,525 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2023-11-29 06:49:35,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.4923076923076923) internal successors, (97), 65 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 06:49:35,525 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2023-11-29 06:49:35,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-29 06:49:35,525 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:49:35,525 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:49:35,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2023-11-29 06:49:35,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:49:35,726 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:49:35,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:49:35,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1367756515, now seen corresponding path program 52 times [2023-11-29 06:49:35,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:49:35,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378313723] [2023-11-29 06:49:35,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:49:35,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:49:35,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:49:53,716 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 55 proven. 575 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:49:53,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:49:53,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378313723] [2023-11-29 06:49:53,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378313723] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:49:53,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132811296] [2023-11-29 06:49:53,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:49:53,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:49:53,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:49:53,717 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:49:53,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-11-29 06:49:54,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:49:54,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:49:54,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 174 conjunts are in the unsatisfiable core [2023-11-29 06:49:54,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:49:54,444 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 06:50:02,980 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 20 proven. 420 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-11-29 06:50:02,980 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:50:17,525 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2023-11-29 06:50:17,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132811296] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:50:17,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:50:17,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 47, 45] total 152 [2023-11-29 06:50:17,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477196486] [2023-11-29 06:50:17,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:50:17,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 152 states [2023-11-29 06:50:17,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:50:17,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2023-11-29 06:50:17,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=795, Invalid=22157, Unknown=0, NotChecked=0, Total=22952 [2023-11-29 06:50:17,528 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 152 states, 152 states have (on average 1.0855263157894737) internal successors, (165), 152 states have internal predecessors, (165), 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 06:50:37,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:50:37,169 INFO L93 Difference]: Finished difference Result 103 states and 106 transitions. [2023-11-29 06:50:37,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-11-29 06:50:37,169 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 152 states have (on average 1.0855263157894737) internal successors, (165), 152 states have internal predecessors, (165), 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 70 [2023-11-29 06:50:37,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:50:37,170 INFO L225 Difference]: With dead ends: 103 [2023-11-29 06:50:37,170 INFO L226 Difference]: Without dead ends: 99 [2023-11-29 06:50:37,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8922 ImplicationChecksByTransitivity, 40.7s TimeCoverageRelationStatistics Valid=1539, Invalid=37073, Unknown=0, NotChecked=0, Total=38612 [2023-11-29 06:50:37,172 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 22 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 5712 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 5728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 5712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:50:37,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 329 Invalid, 5728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 5712 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2023-11-29 06:50:37,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-11-29 06:50:37,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 74. [2023-11-29 06:50:37,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 73 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:50:37,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2023-11-29 06:50:37,300 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 70 [2023-11-29 06:50:37,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:50:37,300 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2023-11-29 06:50:37,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 152 states, 152 states have (on average 1.0855263157894737) internal successors, (165), 152 states have internal predecessors, (165), 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 06:50:37,301 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2023-11-29 06:50:37,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-29 06:50:37,301 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:50:37,301 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:50:37,307 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2023-11-29 06:50:37,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:50:37,502 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:50:37,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:50:37,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1600987091, now seen corresponding path program 53 times [2023-11-29 06:50:37,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:50:37,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642232613] [2023-11-29 06:50:37,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:50:37,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:50:37,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:50:38,331 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 211 proven. 230 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2023-11-29 06:50:38,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:50:38,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642232613] [2023-11-29 06:50:38,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642232613] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:50:38,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739200806] [2023-11-29 06:50:38,331 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:50:38,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:50:38,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:50:38,332 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:50:38,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-11-29 06:50:40,873 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2023-11-29 06:50:40,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:50:40,879 INFO L262 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-29 06:50:40,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:50:42,080 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 210 proven. 231 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2023-11-29 06:50:42,080 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:50:43,372 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 210 proven. 231 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2023-11-29 06:50:43,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739200806] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:50:43,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:50:43,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 109 [2023-11-29 06:50:43,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298952978] [2023-11-29 06:50:43,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:50:43,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2023-11-29 06:50:43,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:50:43,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2023-11-29 06:50:43,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1751, Invalid=10021, Unknown=0, NotChecked=0, Total=11772 [2023-11-29 06:50:43,375 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand has 109 states, 109 states have (on average 1.1192660550458715) internal successors, (122), 109 states have internal predecessors, (122), 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 06:50:45,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:50:45,256 INFO L93 Difference]: Finished difference Result 147 states and 154 transitions. [2023-11-29 06:50:45,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-11-29 06:50:45,257 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 1.1192660550458715) internal successors, (122), 109 states have internal predecessors, (122), 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 71 [2023-11-29 06:50:45,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:50:45,257 INFO L225 Difference]: With dead ends: 147 [2023-11-29 06:50:45,257 INFO L226 Difference]: Without dead ends: 74 [2023-11-29 06:50:45,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 59 SyntacticMatches, 22 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12572 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4065, Invalid=25691, Unknown=0, NotChecked=0, Total=29756 [2023-11-29 06:50:45,260 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 104 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 2244 mSolverCounterSat, 452 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 2696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 452 IncrementalHoareTripleChecker+Valid, 2244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 06:50:45,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 54 Invalid, 2696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [452 Valid, 2244 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 06:50:45,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-29 06:50:45,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2023-11-29 06:50:45,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 73 states have internal predecessors, (76), 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 06:50:45,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2023-11-29 06:50:45,378 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 71 [2023-11-29 06:50:45,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:50:45,378 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2023-11-29 06:50:45,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 1.1192660550458715) internal successors, (122), 109 states have internal predecessors, (122), 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 06:50:45,378 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2023-11-29 06:50:45,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-29 06:50:45,378 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:50:45,378 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:50:45,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-11-29 06:50:45,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b26e434-c7b6-4c10-9a7a-398cd177bb20/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:50:45,579 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:50:45,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:50:45,579 INFO L85 PathProgramCache]: Analyzing trace with hash 462119911, now seen corresponding path program 54 times [2023-11-29 06:50:45,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:50:45,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271072845] [2023-11-29 06:50:45,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:50:45,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:50:45,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat