./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/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_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/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_655f9457-8ba0-455b-b9a6-8c9dda8525f6/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 2e1c46549da470f14361a9b2a5fb79d079bbffb4006138f4fef05b9b152f9be7 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 06:51:58,666 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 06:51:58,731 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 06:51:58,735 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 06:51:58,736 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 06:51:58,762 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 06:51:58,763 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 06:51:58,764 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 06:51:58,765 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 06:51:58,765 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 06:51:58,766 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 06:51:58,766 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 06:51:58,767 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 06:51:58,767 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 06:51:58,768 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 06:51:58,769 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 06:51:58,769 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 06:51:58,770 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 06:51:58,770 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 06:51:58,771 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 06:51:58,771 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 06:51:58,772 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 06:51:58,772 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 06:51:58,773 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 06:51:58,773 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 06:51:58,773 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 06:51:58,774 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 06:51:58,774 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 06:51:58,775 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 06:51:58,775 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 06:51:58,775 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 06:51:58,776 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:51:58,776 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 06:51:58,776 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 06:51:58,777 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 06:51:58,777 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 06:51:58,777 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 06:51:58,777 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 06:51:58,777 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 06:51:58,778 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 06:51:58,778 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 06:51:58,778 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 06:51:58,778 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_655f9457-8ba0-455b-b9a6-8c9dda8525f6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e1c46549da470f14361a9b2a5fb79d079bbffb4006138f4fef05b9b152f9be7 [2023-11-29 06:51:59,007 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 06:51:59,028 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 06:51:59,031 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 06:51:59,032 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 06:51:59,032 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 06:51:59,034 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i [2023-11-29 06:52:01,807 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 06:52:01,982 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 06:52:01,983 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i [2023-11-29 06:52:01,990 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/data/f4c0e5276/f24777b944e8450689595f97fce0ae16/FLAG17de0f02a [2023-11-29 06:52:02,005 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/data/f4c0e5276/f24777b944e8450689595f97fce0ae16 [2023-11-29 06:52:02,007 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 06:52:02,009 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 06:52:02,010 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 06:52:02,010 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 06:52:02,015 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 06:52:02,016 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:52:02" (1/1) ... [2023-11-29 06:52:02,017 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6660ca42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:52:02, skipping insertion in model container [2023-11-29 06:52:02,017 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:52:02" (1/1) ... [2023-11-29 06:52:02,041 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 06:52:02,169 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_655f9457-8ba0-455b-b9a6-8c9dda8525f6/sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i[812,825] [2023-11-29 06:52:02,187 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:52:02,195 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 06:52:02,206 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_655f9457-8ba0-455b-b9a6-8c9dda8525f6/sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i[812,825] [2023-11-29 06:52:02,212 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:52:02,225 INFO L206 MainTranslator]: Completed translation [2023-11-29 06:52:02,225 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:52:02 WrapperNode [2023-11-29 06:52:02,225 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 06:52:02,226 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 06:52:02,226 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 06:52:02,226 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 06:52:02,232 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:52:02" (1/1) ... [2023-11-29 06:52:02,238 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:52:02" (1/1) ... [2023-11-29 06:52:02,255 INFO L138 Inliner]: procedures = 17, calls = 14, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 64 [2023-11-29 06:52:02,256 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 06:52:02,256 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 06:52:02,256 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 06:52:02,257 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 06:52:02,265 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:52:02" (1/1) ... [2023-11-29 06:52:02,265 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:52:02" (1/1) ... [2023-11-29 06:52:02,267 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:52:02" (1/1) ... [2023-11-29 06:52:02,280 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 06:52:02,281 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:52:02" (1/1) ... [2023-11-29 06:52:02,281 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:52:02" (1/1) ... [2023-11-29 06:52:02,286 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:52:02" (1/1) ... [2023-11-29 06:52:02,290 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:52:02" (1/1) ... [2023-11-29 06:52:02,291 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:52:02" (1/1) ... [2023-11-29 06:52:02,292 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:52:02" (1/1) ... [2023-11-29 06:52:02,294 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 06:52:02,295 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 06:52:02,296 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 06:52:02,296 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 06:52:02,297 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:52:02" (1/1) ... [2023-11-29 06:52:02,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:52:02,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:52:02,323 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 06:52:02,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 06:52:02,363 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 06:52:02,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 06:52:02,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 06:52:02,363 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 06:52:02,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 06:52:02,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 06:52:02,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 06:52:02,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 06:52:02,364 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 06:52:02,365 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 06:52:02,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 06:52:02,445 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 06:52:02,448 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 06:52:02,563 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 06:52:02,591 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 06:52:02,591 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-29 06:52:02,591 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:52:02 BoogieIcfgContainer [2023-11-29 06:52:02,592 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 06:52:02,594 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 06:52:02,594 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 06:52:02,597 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 06:52:02,597 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:52:02" (1/3) ... [2023-11-29 06:52:02,598 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c9dec16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:52:02, skipping insertion in model container [2023-11-29 06:52:02,598 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:52:02" (2/3) ... [2023-11-29 06:52:02,598 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c9dec16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:52:02, skipping insertion in model container [2023-11-29 06:52:02,599 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:52:02" (3/3) ... [2023-11-29 06:52:02,600 INFO L112 eAbstractionObserver]: Analyzing ICFG flag_loopdep_simple.i [2023-11-29 06:52:02,620 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 06:52:02,620 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 06:52:02,661 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 06:52:02,666 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;@7a84fc10, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 06:52:02,667 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 06:52:02,670 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:02,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-29 06:52:02,675 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:52:02,675 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:52:02,676 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:52:02,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:02,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1300637357, now seen corresponding path program 1 times [2023-11-29 06:52:02,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:52:02,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421561960] [2023-11-29 06:52:02,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:02,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:52:02,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:02,945 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 06:52:02,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:52:02,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421561960] [2023-11-29 06:52:02,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421561960] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:52:02,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:52:02,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:52:02,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104739450] [2023-11-29 06:52:02,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:52:02,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:52:02,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:52:02,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:52:02,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:52:02,993 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:03,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:52:03,025 INFO L93 Difference]: Finished difference Result 31 states and 47 transitions. [2023-11-29 06:52:03,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:52:03,027 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-29 06:52:03,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:52:03,035 INFO L225 Difference]: With dead ends: 31 [2023-11-29 06:52:03,035 INFO L226 Difference]: Without dead ends: 15 [2023-11-29 06:52:03,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:52:03,041 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:52:03,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:52:03,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-29 06:52:03,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-11-29 06:52:03,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 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 06:52:03,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2023-11-29 06:52:03,075 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 9 [2023-11-29 06:52:03,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:52:03,075 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2023-11-29 06:52:03,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:03,076 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2023-11-29 06:52:03,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-29 06:52:03,076 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:52:03,076 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:52:03,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 06:52:03,077 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:52:03,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:03,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1084499837, now seen corresponding path program 1 times [2023-11-29 06:52:03,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:52:03,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996620104] [2023-11-29 06:52:03,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:03,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:52:03,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:03,141 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 06:52:03,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:52:03,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996620104] [2023-11-29 06:52:03,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996620104] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:52:03,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:52:03,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:52:03,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111245571] [2023-11-29 06:52:03,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:52:03,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:52:03,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:52:03,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:52:03,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:52:03,145 INFO L87 Difference]: Start difference. First operand 15 states and 19 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 06:52:03,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:52:03,178 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2023-11-29 06:52:03,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:52:03,179 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 06:52:03,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:52:03,180 INFO L225 Difference]: With dead ends: 33 [2023-11-29 06:52:03,180 INFO L226 Difference]: Without dead ends: 25 [2023-11-29 06:52:03,180 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 06:52:03,182 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 10 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:52:03,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 19 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:52:03,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-29 06:52:03,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 16. [2023-11-29 06:52:03,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:03,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2023-11-29 06:52:03,188 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 10 [2023-11-29 06:52:03,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:52:03,189 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2023-11-29 06:52:03,189 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 06:52:03,189 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2023-11-29 06:52:03,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-29 06:52:03,190 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:52:03,190 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:52:03,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 06:52:03,191 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:52:03,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:03,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1547209917, now seen corresponding path program 1 times [2023-11-29 06:52:03,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:52:03,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746987342] [2023-11-29 06:52:03,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:03,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:52:03,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:03,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:52:03,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:52:03,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746987342] [2023-11-29 06:52:03,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746987342] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:52:03,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898096570] [2023-11-29 06:52:03,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:03,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:52:03,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:52:03,279 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:52:03,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 06:52:03,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:03,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 06:52:03,358 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:52:03,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:52:03,380 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:52:03,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898096570] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:52:03,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:52:03,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-29 06:52:03,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101884026] [2023-11-29 06:52:03,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:52:03,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:52:03,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:52:03,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:52:03,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:52:03,383 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:03,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:52:03,400 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2023-11-29 06:52:03,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:52:03,400 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-29 06:52:03,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:52:03,401 INFO L225 Difference]: With dead ends: 30 [2023-11-29 06:52:03,401 INFO L226 Difference]: Without dead ends: 16 [2023-11-29 06:52:03,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:52:03,403 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 4 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:52:03,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 31 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:52:03,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-29 06:52:03,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-11-29 06:52:03,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 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 06:52:03,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2023-11-29 06:52:03,409 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 13 [2023-11-29 06:52:03,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:52:03,409 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2023-11-29 06:52:03,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:03,409 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2023-11-29 06:52:03,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-29 06:52:03,410 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:52:03,410 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:52:03,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 06:52:03,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:52:03,616 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:52:03,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:03,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1938410753, now seen corresponding path program 1 times [2023-11-29 06:52:03,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:52:03,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091422876] [2023-11-29 06:52:03,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:03,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:52:03,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:03,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:52:03,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:52:03,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091422876] [2023-11-29 06:52:03,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091422876] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:52:03,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888619279] [2023-11-29 06:52:03,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:03,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:52:03,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:52:03,677 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:52:03,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 06:52:03,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:03,736 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 06:52:03,737 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:52:03,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:52:03,788 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:52:03,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:52:03,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888619279] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:52:03,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:52:03,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2023-11-29 06:52:03,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306846915] [2023-11-29 06:52:03,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:52:03,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 06:52:03,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:52:03,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 06:52:03,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-29 06:52:03,817 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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 06:52:03,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:52:03,871 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2023-11-29 06:52:03,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 06:52:03,872 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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) Word has length 13 [2023-11-29 06:52:03,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:52:03,873 INFO L225 Difference]: With dead ends: 51 [2023-11-29 06:52:03,873 INFO L226 Difference]: Without dead ends: 38 [2023-11-29 06:52:03,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-29 06:52:03,875 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 16 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:52:03,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 40 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:52:03,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-29 06:52:03,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 22. [2023-11-29 06:52:03,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 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 06:52:03,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2023-11-29 06:52:03,882 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 13 [2023-11-29 06:52:03,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:52:03,883 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2023-11-29 06:52:03,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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 06:52:03,883 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2023-11-29 06:52:03,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-29 06:52:03,884 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:52:03,884 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:52:03,889 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 06:52:04,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:52:04,087 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:52:04,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:04,088 INFO L85 PathProgramCache]: Analyzing trace with hash 308043518, now seen corresponding path program 2 times [2023-11-29 06:52:04,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:52:04,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229995375] [2023-11-29 06:52:04,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:04,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:52:04,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:04,258 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 06:52:04,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:52:04,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229995375] [2023-11-29 06:52:04,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229995375] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:52:04,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019919475] [2023-11-29 06:52:04,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:52:04,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:52:04,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:52:04,260 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:52:04,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 06:52:04,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:52:04,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:52:04,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 06:52:04,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:52:04,422 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 06:52:04,422 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:52:04,520 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 06:52:04,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019919475] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:52:04,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:52:04,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-11-29 06:52:04,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934860443] [2023-11-29 06:52:04,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:52:04,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 06:52:04,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:52:04,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 06:52:04,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=146, Unknown=0, NotChecked=0, Total=272 [2023-11-29 06:52:04,524 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 06:52:04,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:52:04,553 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2023-11-29 06:52:04,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 06:52:04,553 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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) Word has length 19 [2023-11-29 06:52:04,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:52:04,554 INFO L225 Difference]: With dead ends: 44 [2023-11-29 06:52:04,554 INFO L226 Difference]: Without dead ends: 28 [2023-11-29 06:52:04,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=126, Invalid=146, Unknown=0, NotChecked=0, Total=272 [2023-11-29 06:52:04,556 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:52:04,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 67 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:52:04,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-29 06:52:04,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-11-29 06:52:04,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 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 06:52:04,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2023-11-29 06:52:04,562 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 19 [2023-11-29 06:52:04,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:52:04,562 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2023-11-29 06:52:04,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 06:52:04,562 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2023-11-29 06:52:04,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-29 06:52:04,563 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:52:04,563 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:52:04,568 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 06:52:04,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:52:04,764 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:52:04,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:04,764 INFO L85 PathProgramCache]: Analyzing trace with hash -326971746, now seen corresponding path program 3 times [2023-11-29 06:52:04,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:52:04,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111155371] [2023-11-29 06:52:04,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:04,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:52:04,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:05,077 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 06:52:05,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:52:05,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111155371] [2023-11-29 06:52:05,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111155371] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:52:05,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24781675] [2023-11-29 06:52:05,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:52:05,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:52:05,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:52:05,079 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:52:05,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 06:52:05,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 06:52:05,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:52:05,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 06:52:05,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:52:05,200 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 06:52:05,200 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:52:05,254 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 06:52:05,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24781675] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:52:05,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:52:05,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5] total 19 [2023-11-29 06:52:05,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646896286] [2023-11-29 06:52:05,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:52:05,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 06:52:05,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:52:05,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 06:52:05,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-11-29 06:52:05,257 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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 06:52:05,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:52:05,389 INFO L93 Difference]: Finished difference Result 93 states and 108 transitions. [2023-11-29 06:52:05,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 06:52:05,389 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-11-29 06:52:05,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:52:05,391 INFO L225 Difference]: With dead ends: 93 [2023-11-29 06:52:05,391 INFO L226 Difference]: Without dead ends: 77 [2023-11-29 06:52:05,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-11-29 06:52:05,393 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 67 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:52:05,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 75 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:52:05,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-29 06:52:05,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 41. [2023-11-29 06:52:05,401 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 06:52:05,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2023-11-29 06:52:05,401 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 25 [2023-11-29 06:52:05,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:52:05,402 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2023-11-29 06:52:05,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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 06:52:05,402 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2023-11-29 06:52:05,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-29 06:52:05,403 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:52:05,403 INFO L195 NwaCegarLoop]: trace histogram [11, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:52:05,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 06:52:05,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:52:05,607 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:52:05,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:05,608 INFO L85 PathProgramCache]: Analyzing trace with hash 529727645, now seen corresponding path program 4 times [2023-11-29 06:52:05,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:52:05,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144934079] [2023-11-29 06:52:05,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:05,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:52:05,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:05,898 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-29 06:52:05,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:52:05,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144934079] [2023-11-29 06:52:05,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144934079] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:52:05,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144725451] [2023-11-29 06:52:05,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:52:05,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:52:05,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:52:05,901 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:52:05,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 06:52:05,991 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:52:05,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:52:05,993 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 06:52:05,994 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:52:06,115 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-29 06:52:06,115 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:52:06,271 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-29 06:52:06,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144725451] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:52:06,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:52:06,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 28 [2023-11-29 06:52:06,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044293491] [2023-11-29 06:52:06,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:52:06,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 06:52:06,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:52:06,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 06:52:06,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2023-11-29 06:52:06,274 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 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 06:52:06,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:52:06,487 INFO L93 Difference]: Finished difference Result 186 states and 213 transitions. [2023-11-29 06:52:06,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 06:52:06,488 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 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 38 [2023-11-29 06:52:06,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:52:06,490 INFO L225 Difference]: With dead ends: 186 [2023-11-29 06:52:06,490 INFO L226 Difference]: Without dead ends: 158 [2023-11-29 06:52:06,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2023-11-29 06:52:06,492 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 270 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:52:06,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 123 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:52:06,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-11-29 06:52:06,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 66. [2023-11-29 06:52:06,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 65 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 06:52:06,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2023-11-29 06:52:06,503 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 38 [2023-11-29 06:52:06,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:52:06,504 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2023-11-29 06:52:06,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 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 06:52:06,504 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2023-11-29 06:52:06,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-29 06:52:06,506 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:52:06,507 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:52:06,512 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 06:52:06,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 06:52:06,712 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:52:06,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:06,712 INFO L85 PathProgramCache]: Analyzing trace with hash -329553154, now seen corresponding path program 5 times [2023-11-29 06:52:06,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:52:06,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179867366] [2023-11-29 06:52:06,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:06,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:52:06,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:07,106 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2023-11-29 06:52:07,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:52:07,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179867366] [2023-11-29 06:52:07,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179867366] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:52:07,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751270397] [2023-11-29 06:52:07,107 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:52:07,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:52:07,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:52:07,109 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:52:07,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 06:52:07,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2023-11-29 06:52:07,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:52:07,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 06:52:07,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:52:07,691 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-29 06:52:07,691 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:52:08,135 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-29 06:52:08,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751270397] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:52:08,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:52:08,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 45 [2023-11-29 06:52:08,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318133825] [2023-11-29 06:52:08,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:52:08,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-29 06:52:08,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:52:08,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-29 06:52:08,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=1380, Unknown=0, NotChecked=0, Total=1980 [2023-11-29 06:52:08,139 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand has 45 states, 45 states have (on average 2.5555555555555554) internal successors, (115), 45 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:08,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:52:08,479 INFO L93 Difference]: Finished difference Result 371 states and 422 transitions. [2023-11-29 06:52:08,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-29 06:52:08,480 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.5555555555555554) internal successors, (115), 45 states have internal predecessors, (115), 0 states have call successors, (0), 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 06:52:08,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:52:08,483 INFO L225 Difference]: With dead ends: 371 [2023-11-29 06:52:08,483 INFO L226 Difference]: Without dead ends: 319 [2023-11-29 06:52:08,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=600, Invalid=1380, Unknown=0, NotChecked=0, Total=1980 [2023-11-29 06:52:08,485 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 571 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:52:08,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [571 Valid, 212 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:52:08,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2023-11-29 06:52:08,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 115. [2023-11-29 06:52:08,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.0350877192982457) internal successors, (118), 114 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:08,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 118 transitions. [2023-11-29 06:52:08,500 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 118 transitions. Word has length 63 [2023-11-29 06:52:08,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:52:08,501 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 118 transitions. [2023-11-29 06:52:08,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.5555555555555554) internal successors, (115), 45 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:08,501 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 118 transitions. [2023-11-29 06:52:08,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-11-29 06:52:08,503 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:52:08,503 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:52:08,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-29 06:52:08,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:52:08,704 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:52:08,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:08,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1259011773, now seen corresponding path program 6 times [2023-11-29 06:52:08,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:52:08,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347115736] [2023-11-29 06:52:08,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:08,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:52:08,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:09,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2023-11-29 06:52:09,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:52:09,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347115736] [2023-11-29 06:52:09,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347115736] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:52:09,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003134641] [2023-11-29 06:52:09,278 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:52:09,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:52:09,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:52:09,279 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:52:09,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 06:52:09,395 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-29 06:52:09,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:52:09,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 06:52:09,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:52:09,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 1367 trivial. 0 not checked. [2023-11-29 06:52:09,856 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:52:10,108 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 06:52:10,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 11 [2023-11-29 06:52:10,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 29 proven. 30 refuted. 0 times theorem prover too weak. 1367 trivial. 0 not checked. [2023-11-29 06:52:10,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003134641] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:52:10,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:52:10,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7, 7] total 27 [2023-11-29 06:52:10,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078630585] [2023-11-29 06:52:10,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:52:10,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 06:52:10,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:52:10,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 06:52:10,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=544, Unknown=0, NotChecked=0, Total=702 [2023-11-29 06:52:10,132 INFO L87 Difference]: Start difference. First operand 115 states and 118 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 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 06:52:10,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:52:10,507 INFO L93 Difference]: Finished difference Result 221 states and 229 transitions. [2023-11-29 06:52:10,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 06:52:10,508 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 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 112 [2023-11-29 06:52:10,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:52:10,509 INFO L225 Difference]: With dead ends: 221 [2023-11-29 06:52:10,509 INFO L226 Difference]: Without dead ends: 121 [2023-11-29 06:52:10,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=423, Invalid=1469, Unknown=0, NotChecked=0, Total=1892 [2023-11-29 06:52:10,511 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 39 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:52:10,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 76 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:52:10,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-11-29 06:52:10,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2023-11-29 06:52:10,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.0423728813559323) internal successors, (123), 118 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:10,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 123 transitions. [2023-11-29 06:52:10,523 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 123 transitions. Word has length 112 [2023-11-29 06:52:10,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:52:10,524 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 123 transitions. [2023-11-29 06:52:10,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 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 06:52:10,524 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 123 transitions. [2023-11-29 06:52:10,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-11-29 06:52:10,526 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:52:10,526 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:52:10,532 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 06:52:10,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:52:10,729 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:52:10,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:10,730 INFO L85 PathProgramCache]: Analyzing trace with hash 119331897, now seen corresponding path program 1 times [2023-11-29 06:52:10,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:52:10,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060537320] [2023-11-29 06:52:10,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:10,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:52:10,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:10,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1442 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1440 trivial. 0 not checked. [2023-11-29 06:52:10,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:52:10,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060537320] [2023-11-29 06:52:10,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060537320] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:52:10,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:52:10,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:52:10,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042437061] [2023-11-29 06:52:10,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:52:10,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:52:10,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:52:10,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:52:10,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:52:10,824 INFO L87 Difference]: Start difference. First operand 119 states and 123 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 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 06:52:10,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:52:10,836 INFO L93 Difference]: Finished difference Result 126 states and 131 transitions. [2023-11-29 06:52:10,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:52:10,837 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 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) Word has length 116 [2023-11-29 06:52:10,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:52:10,838 INFO L225 Difference]: With dead ends: 126 [2023-11-29 06:52:10,838 INFO L226 Difference]: Without dead ends: 119 [2023-11-29 06:52:10,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:52:10,840 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:52:10,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 13 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:52:10,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-11-29 06:52:10,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2023-11-29 06:52:10,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.0254237288135593) internal successors, (121), 118 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:10,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2023-11-29 06:52:10,852 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 116 [2023-11-29 06:52:10,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:52:10,853 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2023-11-29 06:52:10,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 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 06:52:10,853 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2023-11-29 06:52:10,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-11-29 06:52:10,854 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:52:10,855 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:52:10,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-29 06:52:10,855 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:52:10,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:10,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1370180029, now seen corresponding path program 1 times [2023-11-29 06:52:10,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:52:10,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476458679] [2023-11-29 06:52:10,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:10,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:52:10,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:11,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1443 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 1338 trivial. 0 not checked. [2023-11-29 06:52:11,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:52:11,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476458679] [2023-11-29 06:52:11,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476458679] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:52:11,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795591400] [2023-11-29 06:52:11,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:11,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:52:11,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:52:11,292 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:52:11,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 06:52:11,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:11,429 INFO L262 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 06:52:11,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:52:11,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1443 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 1338 trivial. 0 not checked. [2023-11-29 06:52:11,822 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:52:12,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1443 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 1338 trivial. 0 not checked. [2023-11-29 06:52:12,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795591400] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:52:12,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:52:12,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 46 [2023-11-29 06:52:12,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679747259] [2023-11-29 06:52:12,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:52:12,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-29 06:52:12,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:52:12,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-29 06:52:12,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=976, Invalid=1186, Unknown=0, NotChecked=0, Total=2162 [2023-11-29 06:52:12,363 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand has 47 states, 47 states have (on average 1.297872340425532) internal successors, (61), 46 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 06:52:12,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:52:12,414 INFO L93 Difference]: Finished difference Result 238 states and 257 transitions. [2023-11-29 06:52:12,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-29 06:52:12,414 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.297872340425532) internal successors, (61), 46 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2023-11-29 06:52:12,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:52:12,415 INFO L225 Difference]: With dead ends: 238 [2023-11-29 06:52:12,415 INFO L226 Difference]: Without dead ends: 135 [2023-11-29 06:52:12,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=976, Invalid=1186, Unknown=0, NotChecked=0, Total=2162 [2023-11-29 06:52:12,417 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:52:12,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 74 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:52:12,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-11-29 06:52:12,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2023-11-29 06:52:12,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.0223880597014925) internal successors, (137), 134 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:12,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2023-11-29 06:52:12,429 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 118 [2023-11-29 06:52:12,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:52:12,429 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2023-11-29 06:52:12,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.297872340425532) internal successors, (61), 46 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 06:52:12,429 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2023-11-29 06:52:12,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-11-29 06:52:12,430 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:52:12,431 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:52:12,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-29 06:52:12,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:52:12,632 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:52:12,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:12,632 INFO L85 PathProgramCache]: Analyzing trace with hash -875874493, now seen corresponding path program 2 times [2023-11-29 06:52:12,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:52:12,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858303297] [2023-11-29 06:52:12,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:12,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:52:12,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:13,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1803 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 1338 trivial. 0 not checked. [2023-11-29 06:52:13,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:52:13,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858303297] [2023-11-29 06:52:13,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858303297] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:52:13,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366531577] [2023-11-29 06:52:13,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:52:13,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:52:13,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:52:13,937 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:52:13,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 06:52:14,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:52:14,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:52:14,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-29 06:52:14,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:52:15,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1803 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 1338 trivial. 0 not checked. [2023-11-29 06:52:15,239 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:52:17,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1803 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 1338 trivial. 0 not checked. [2023-11-29 06:52:17,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366531577] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:52:17,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:52:17,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 94 [2023-11-29 06:52:17,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247301688] [2023-11-29 06:52:17,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:52:17,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2023-11-29 06:52:17,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:52:17,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2023-11-29 06:52:17,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4000, Invalid=4930, Unknown=0, NotChecked=0, Total=8930 [2023-11-29 06:52:17,153 INFO L87 Difference]: Start difference. First operand 135 states and 137 transitions. Second operand has 95 states, 95 states have (on average 1.1473684210526316) internal successors, (109), 94 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:17,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:52:17,247 INFO L93 Difference]: Finished difference Result 270 states and 305 transitions. [2023-11-29 06:52:17,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-11-29 06:52:17,247 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 1.1473684210526316) internal successors, (109), 94 states have internal predecessors, (109), 0 states have call successors, (0), 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 134 [2023-11-29 06:52:17,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:52:17,248 INFO L225 Difference]: With dead ends: 270 [2023-11-29 06:52:17,248 INFO L226 Difference]: Without dead ends: 167 [2023-11-29 06:52:17,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4000, Invalid=4930, Unknown=0, NotChecked=0, Total=8930 [2023-11-29 06:52:17,251 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:52:17,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 74 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:52:17,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-11-29 06:52:17,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2023-11-29 06:52:17,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.0180722891566265) internal successors, (169), 166 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:17,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 169 transitions. [2023-11-29 06:52:17,261 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 169 transitions. Word has length 134 [2023-11-29 06:52:17,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:52:17,261 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 169 transitions. [2023-11-29 06:52:17,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 1.1473684210526316) internal successors, (109), 94 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:17,261 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 169 transitions. [2023-11-29 06:52:17,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-11-29 06:52:17,262 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:52:17,262 INFO L195 NwaCegarLoop]: trace histogram [62, 30, 30, 30, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:52:17,267 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 06:52:17,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:52:17,463 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:52:17,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:17,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1364343107, now seen corresponding path program 3 times [2023-11-29 06:52:17,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:52:17,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166097590] [2023-11-29 06:52:17,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:17,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:52:17,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:20,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3291 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 1338 trivial. 0 not checked. [2023-11-29 06:52:20,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:52:20,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166097590] [2023-11-29 06:52:20,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166097590] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:52:20,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793394616] [2023-11-29 06:52:20,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:52:20,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:52:20,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:52:20,640 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:52:20,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 06:52:20,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-29 06:52:20,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:52:20,799 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 06:52:20,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:52:21,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3291 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 3143 trivial. 0 not checked. [2023-11-29 06:52:21,375 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:52:21,655 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 06:52:21,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 11 [2023-11-29 06:52:21,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3291 backedges. 28 proven. 120 refuted. 0 times theorem prover too weak. 3143 trivial. 0 not checked. [2023-11-29 06:52:21,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793394616] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:52:21,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:52:21,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 9, 9] total 80 [2023-11-29 06:52:21,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947569554] [2023-11-29 06:52:21,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:52:21,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2023-11-29 06:52:21,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:52:21,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2023-11-29 06:52:21,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2135, Invalid=4185, Unknown=0, NotChecked=0, Total=6320 [2023-11-29 06:52:21,726 INFO L87 Difference]: Start difference. First operand 167 states and 169 transitions. Second operand has 80 states, 80 states have (on average 1.5125) internal successors, (121), 80 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:24,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:52:24,124 INFO L93 Difference]: Finished difference Result 278 states and 283 transitions. [2023-11-29 06:52:24,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-11-29 06:52:24,125 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.5125) internal successors, (121), 80 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 166 [2023-11-29 06:52:24,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:52:24,126 INFO L225 Difference]: With dead ends: 278 [2023-11-29 06:52:24,126 INFO L226 Difference]: Without dead ends: 175 [2023-11-29 06:52:24,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3342 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=6332, Invalid=15130, Unknown=0, NotChecked=0, Total=21462 [2023-11-29 06:52:24,133 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 39 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:52:24,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 107 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:52:24,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-11-29 06:52:24,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 173. [2023-11-29 06:52:24,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.0174418604651163) internal successors, (175), 172 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:24,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 175 transitions. [2023-11-29 06:52:24,148 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 175 transitions. Word has length 166 [2023-11-29 06:52:24,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:52:24,149 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 175 transitions. [2023-11-29 06:52:24,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.5125) internal successors, (121), 80 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:24,149 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 175 transitions. [2023-11-29 06:52:24,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-11-29 06:52:24,151 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:52:24,151 INFO L195 NwaCegarLoop]: trace histogram [63, 30, 30, 30, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:52:24,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-29 06:52:24,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:52:24,352 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:52:24,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:24,352 INFO L85 PathProgramCache]: Analyzing trace with hash -570168771, now seen corresponding path program 4 times [2023-11-29 06:52:24,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:52:24,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108611601] [2023-11-29 06:52:24,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:24,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:52:24,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:27,498 INFO L134 CoverageAnalysis]: Checked inductivity of 3362 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 1346 trivial. 0 not checked. [2023-11-29 06:52:27,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:52:27,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108611601] [2023-11-29 06:52:27,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108611601] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:52:27,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427152535] [2023-11-29 06:52:27,499 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:52:27,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:52:27,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:52:27,500 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:52:27,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 06:52:27,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:52:27,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:52:27,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 866 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 06:52:27,735 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:52:28,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3362 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2023-11-29 06:52:28,914 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:52:30,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3362 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2023-11-29 06:52:30,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427152535] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:52:30,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:52:30,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 33, 33] total 128 [2023-11-29 06:52:30,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276616906] [2023-11-29 06:52:30,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:52:30,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2023-11-29 06:52:30,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:52:30,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2023-11-29 06:52:30,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4160, Invalid=12096, Unknown=0, NotChecked=0, Total=16256 [2023-11-29 06:52:30,602 INFO L87 Difference]: Start difference. First operand 173 states and 175 transitions. Second operand has 128 states, 128 states have (on average 2.0703125) internal successors, (265), 128 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:31,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:52:31,639 INFO L93 Difference]: Finished difference Result 794 states and 830 transitions. [2023-11-29 06:52:31,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2023-11-29 06:52:31,640 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.0703125) internal successors, (265), 128 states have internal predecessors, (265), 0 states have call successors, (0), 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 172 [2023-11-29 06:52:31,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:52:31,643 INFO L225 Difference]: With dead ends: 794 [2023-11-29 06:52:31,643 INFO L226 Difference]: Without dead ends: 686 [2023-11-29 06:52:31,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3906 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=4160, Invalid=12096, Unknown=0, NotChecked=0, Total=16256 [2023-11-29 06:52:31,645 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 1526 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1526 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:52:31,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1526 Valid, 379 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 06:52:31,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2023-11-29 06:52:31,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 270. [2023-11-29 06:52:31,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 1.0111524163568772) internal successors, (272), 269 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:31,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 272 transitions. [2023-11-29 06:52:31,664 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 272 transitions. Word has length 172 [2023-11-29 06:52:31,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:52:31,664 INFO L495 AbstractCegarLoop]: Abstraction has 270 states and 272 transitions. [2023-11-29 06:52:31,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 2.0703125) internal successors, (265), 128 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:31,665 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 272 transitions. [2023-11-29 06:52:31,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2023-11-29 06:52:31,667 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:52:31,667 INFO L195 NwaCegarLoop]: trace histogram [64, 62, 62, 62, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:52:31,672 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 06:52:31,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:52:31,868 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:52:31,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:31,868 INFO L85 PathProgramCache]: Analyzing trace with hash -281988898, now seen corresponding path program 5 times [2023-11-29 06:52:31,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:52:31,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591311813] [2023-11-29 06:52:31,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:31,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:52:31,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:35,216 INFO L134 CoverageAnalysis]: Checked inductivity of 7826 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 5746 trivial. 0 not checked. [2023-11-29 06:52:35,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:52:35,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591311813] [2023-11-29 06:52:35,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591311813] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:52:35,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363900290] [2023-11-29 06:52:35,217 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:52:35,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:52:35,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:52:35,218 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:52:35,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 06:53:59,955 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 63 check-sat command(s) [2023-11-29 06:53:59,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:53:59,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 1099 conjuncts, 64 conjunts are in the unsatisfiable core [2023-11-29 06:53:59,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:54:02,855 INFO L134 CoverageAnalysis]: Checked inductivity of 7826 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 2091 trivial. 0 not checked. [2023-11-29 06:54:02,855 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:54:08,096 INFO L134 CoverageAnalysis]: Checked inductivity of 7826 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 2091 trivial. 0 not checked. [2023-11-29 06:54:08,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363900290] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:54:08,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:54:08,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 65, 65] total 193 [2023-11-29 06:54:08,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127903682] [2023-11-29 06:54:08,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:54:08,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2023-11-29 06:54:08,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:54:08,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2023-11-29 06:54:08,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10338, Invalid=26718, Unknown=0, NotChecked=0, Total=37056 [2023-11-29 06:54:08,108 INFO L87 Difference]: Start difference. First operand 270 states and 272 transitions. Second operand has 193 states, 193 states have (on average 2.373056994818653) internal successors, (458), 193 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:54:14,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:54:14,765 INFO L93 Difference]: Finished difference Result 1531 states and 1599 transitions. [2023-11-29 06:54:14,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2023-11-29 06:54:14,766 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 2.373056994818653) internal successors, (458), 193 states have internal predecessors, (458), 0 states have call successors, (0), 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 269 [2023-11-29 06:54:14,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:54:14,770 INFO L225 Difference]: With dead ends: 1531 [2023-11-29 06:54:14,771 INFO L226 Difference]: Without dead ends: 1327 [2023-11-29 06:54:14,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8064 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=10338, Invalid=26718, Unknown=0, NotChecked=0, Total=37056 [2023-11-29 06:54:14,773 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 2788 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 471 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2788 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 1221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 471 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 06:54:14,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2788 Valid, 665 Invalid, 1221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [471 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 06:54:14,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2023-11-29 06:54:14,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 463. [2023-11-29 06:54:14,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 1.0064935064935066) internal successors, (465), 462 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:54:14,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 465 transitions. [2023-11-29 06:54:14,817 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 465 transitions. Word has length 269 [2023-11-29 06:54:14,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:54:14,817 INFO L495 AbstractCegarLoop]: Abstraction has 463 states and 465 transitions. [2023-11-29 06:54:14,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 2.373056994818653) internal successors, (458), 193 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:54:14,818 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 465 transitions. [2023-11-29 06:54:14,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2023-11-29 06:54:14,828 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:54:14,828 INFO L195 NwaCegarLoop]: trace histogram [126, 126, 126, 65, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:54:14,853 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 06:54:15,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 06:54:15,029 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:54:15,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:54:15,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1832614307, now seen corresponding path program 6 times [2023-11-29 06:54:15,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:54:15,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298655767] [2023-11-29 06:54:15,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:54:15,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:54:15,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:54:19,037 INFO L134 CoverageAnalysis]: Checked inductivity of 25907 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 23762 trivial. 0 not checked. [2023-11-29 06:54:19,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:54:19,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298655767] [2023-11-29 06:54:19,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298655767] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:54:19,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358368166] [2023-11-29 06:54:19,038 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:54:19,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:54:19,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:54:19,039 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:54:19,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 06:54:19,572 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2023-11-29 06:54:19,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:54:19,576 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-29 06:54:19,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:54:20,961 INFO L134 CoverageAnalysis]: Checked inductivity of 25907 backedges. 0 proven. 1007 refuted. 0 times theorem prover too weak. 24900 trivial. 0 not checked. [2023-11-29 06:54:20,961 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:54:21,666 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 06:54:21,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 11 [2023-11-29 06:54:21,765 INFO L134 CoverageAnalysis]: Checked inductivity of 25907 backedges. 123 proven. 884 refuted. 0 times theorem prover too weak. 24900 trivial. 0 not checked. [2023-11-29 06:54:21,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358368166] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:54:21,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:54:21,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 11, 11] total 87 [2023-11-29 06:54:21,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347665534] [2023-11-29 06:54:21,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:54:21,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2023-11-29 06:54:21,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:54:21,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2023-11-29 06:54:21,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2350, Invalid=5132, Unknown=0, NotChecked=0, Total=7482 [2023-11-29 06:54:21,769 INFO L87 Difference]: Start difference. First operand 463 states and 465 transitions. Second operand has 87 states, 87 states have (on average 1.6091954022988506) internal successors, (140), 87 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:54:24,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:54:24,600 INFO L93 Difference]: Finished difference Result 867 states and 872 transitions. [2023-11-29 06:54:24,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2023-11-29 06:54:24,601 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.6091954022988506) internal successors, (140), 87 states have internal predecessors, (140), 0 states have call successors, (0), 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 462 [2023-11-29 06:54:24,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:54:24,603 INFO L225 Difference]: With dead ends: 867 [2023-11-29 06:54:24,603 INFO L226 Difference]: Without dead ends: 471 [2023-11-29 06:54:24,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1060 GetRequests, 904 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4048 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=6955, Invalid=17851, Unknown=0, NotChecked=0, Total=24806 [2023-11-29 06:54:24,606 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 29 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:54:24,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 191 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:54:24,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-11-29 06:54:24,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 469. [2023-11-29 06:54:24,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 1.0064102564102564) internal successors, (471), 468 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:54:24,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 471 transitions. [2023-11-29 06:54:24,632 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 471 transitions. Word has length 462 [2023-11-29 06:54:24,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:54:24,632 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 471 transitions. [2023-11-29 06:54:24,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.6091954022988506) internal successors, (140), 87 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:54:24,633 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 471 transitions. [2023-11-29 06:54:24,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2023-11-29 06:54:24,640 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:54:24,640 INFO L195 NwaCegarLoop]: trace histogram [126, 126, 126, 66, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:54:24,647 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 06:54:24,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 06:54:24,840 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:54:24,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:54:24,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1131711901, now seen corresponding path program 7 times [2023-11-29 06:54:24,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:54:24,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68674882] [2023-11-29 06:54:24,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:54:24,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:54:24,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:54:28,793 INFO L134 CoverageAnalysis]: Checked inductivity of 25986 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 23775 trivial. 0 not checked. [2023-11-29 06:54:28,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:54:28,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68674882] [2023-11-29 06:54:28,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68674882] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:54:28,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329280538] [2023-11-29 06:54:28,794 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 06:54:28,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:54:28,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:54:28,795 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:54:28,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 06:54:29,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:54:29,148 INFO L262 TraceCheckSpWp]: Trace formula consists of 1578 conjuncts, 70 conjunts are in the unsatisfiable core [2023-11-29 06:54:29,155 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:54:33,445 INFO L134 CoverageAnalysis]: Checked inductivity of 25986 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 23775 trivial. 0 not checked. [2023-11-29 06:54:33,445 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:54:41,843 INFO L134 CoverageAnalysis]: Checked inductivity of 25986 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 23775 trivial. 0 not checked. [2023-11-29 06:54:41,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329280538] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:54:41,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:54:41,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68, 68] total 202 [2023-11-29 06:54:41,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552049482] [2023-11-29 06:54:41,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:54:41,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2023-11-29 06:54:41,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:54:41,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2023-11-29 06:54:41,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18292, Invalid=22714, Unknown=0, NotChecked=0, Total=41006 [2023-11-29 06:54:41,856 INFO L87 Difference]: Start difference. First operand 469 states and 471 transitions. Second operand has 203 states, 203 states have (on average 1.0689655172413792) internal successors, (217), 202 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:54:42,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:54:42,180 INFO L93 Difference]: Finished difference Result 938 states and 1009 transitions. [2023-11-29 06:54:42,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2023-11-29 06:54:42,181 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0689655172413792) internal successors, (217), 202 states have internal predecessors, (217), 0 states have call successors, (0), 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 468 [2023-11-29 06:54:42,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:54:42,184 INFO L225 Difference]: With dead ends: 938 [2023-11-29 06:54:42,184 INFO L226 Difference]: Without dead ends: 537 [2023-11-29 06:54:42,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1002 GetRequests, 801 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2145 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=18292, Invalid=22714, Unknown=0, NotChecked=0, Total=41006 [2023-11-29 06:54:42,188 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:54:42,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 86 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:54:42,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2023-11-29 06:54:42,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 537. [2023-11-29 06:54:42,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 536 states have (on average 1.0055970149253732) internal successors, (539), 536 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:54:42,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 539 transitions. [2023-11-29 06:54:42,237 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 539 transitions. Word has length 468 [2023-11-29 06:54:42,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:54:42,238 INFO L495 AbstractCegarLoop]: Abstraction has 537 states and 539 transitions. [2023-11-29 06:54:42,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0689655172413792) internal successors, (217), 202 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:54:42,238 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 539 transitions. [2023-11-29 06:54:42,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 537 [2023-11-29 06:54:42,242 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:54:42,242 INFO L195 NwaCegarLoop]: trace histogram [134, 126, 126, 126, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:54:42,249 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 06:54:42,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 06:54:42,443 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:54:42,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:54:42,443 INFO L85 PathProgramCache]: Analyzing trace with hash -552249693, now seen corresponding path program 8 times [2023-11-29 06:54:42,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:54:42,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760230085] [2023-11-29 06:54:42,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:54:42,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:54:42,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:54:55,450 INFO L134 CoverageAnalysis]: Checked inductivity of 32820 backedges. 0 proven. 9045 refuted. 0 times theorem prover too weak. 23775 trivial. 0 not checked. [2023-11-29 06:54:55,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:54:55,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760230085] [2023-11-29 06:54:55,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760230085] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:54:55,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33192632] [2023-11-29 06:54:55,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:54:55,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:54:55,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:54:55,451 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:54:55,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 06:54:55,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:54:55,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:54:55,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 2190 conjuncts, 138 conjunts are in the unsatisfiable core [2023-11-29 06:54:55,923 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:55:13,151 INFO L134 CoverageAnalysis]: Checked inductivity of 32820 backedges. 0 proven. 9045 refuted. 0 times theorem prover too weak. 23775 trivial. 0 not checked. [2023-11-29 06:55:13,151 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:55:46,434 INFO L134 CoverageAnalysis]: Checked inductivity of 32820 backedges. 0 proven. 9045 refuted. 0 times theorem prover too weak. 23775 trivial. 0 not checked. [2023-11-29 06:55:46,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33192632] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:55:46,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:55:46,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [136, 136, 136] total 406 [2023-11-29 06:55:46,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206483930] [2023-11-29 06:55:46,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:55:46,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 407 states [2023-11-29 06:55:46,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:55:46,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 407 interpolants. [2023-11-29 06:55:46,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73576, Invalid=91666, Unknown=0, NotChecked=0, Total=165242 [2023-11-29 06:55:46,453 INFO L87 Difference]: Start difference. First operand 537 states and 539 transitions. Second operand has 407 states, 407 states have (on average 1.0343980343980343) internal successors, (421), 406 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:55:47,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:55:47,795 INFO L93 Difference]: Finished difference Result 1074 states and 1213 transitions. [2023-11-29 06:55:47,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 272 states. [2023-11-29 06:55:47,796 INFO L78 Accepts]: Start accepts. Automaton has has 407 states, 407 states have (on average 1.0343980343980343) internal successors, (421), 406 states have internal predecessors, (421), 0 states have call successors, (0), 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 536 [2023-11-29 06:55:47,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:55:47,800 INFO L225 Difference]: With dead ends: 1074 [2023-11-29 06:55:47,800 INFO L226 Difference]: Without dead ends: 673 [2023-11-29 06:55:47,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1206 GetRequests, 801 SyntacticMatches, 0 SemanticMatches, 405 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8911 ImplicationChecksByTransitivity, 56.6s TimeCoverageRelationStatistics Valid=73576, Invalid=91666, Unknown=0, NotChecked=0, Total=165242 [2023-11-29 06:55:47,811 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:55:47,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 98 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 06:55:47,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2023-11-29 06:55:47,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 673. [2023-11-29 06:55:47,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 672 states have (on average 1.0044642857142858) internal successors, (675), 672 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:55:47,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 675 transitions. [2023-11-29 06:55:47,852 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 675 transitions. Word has length 536 [2023-11-29 06:55:47,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:55:47,852 INFO L495 AbstractCegarLoop]: Abstraction has 673 states and 675 transitions. [2023-11-29 06:55:47,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 407 states, 407 states have (on average 1.0343980343980343) internal successors, (421), 406 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:55:47,853 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 675 transitions. [2023-11-29 06:55:47,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 673 [2023-11-29 06:55:47,856 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:55:47,856 INFO L195 NwaCegarLoop]: trace histogram [270, 126, 126, 126, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:55:47,865 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 06:55:48,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 06:55:48,057 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:55:48,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:55:48,057 INFO L85 PathProgramCache]: Analyzing trace with hash -2075214045, now seen corresponding path program 9 times [2023-11-29 06:55:48,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:55:48,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990667767] [2023-11-29 06:55:48,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:55:48,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:55:48,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:56:38,785 INFO L134 CoverageAnalysis]: Checked inductivity of 60360 backedges. 0 proven. 36585 refuted. 0 times theorem prover too weak. 23775 trivial. 0 not checked. [2023-11-29 06:56:38,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:56:38,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990667767] [2023-11-29 06:56:38,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990667767] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:56:38,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297843250] [2023-11-29 06:56:38,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:56:38,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:56:38,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:56:38,787 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:56:38,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 06:56:39,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2023-11-29 06:56:39,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:56:39,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 06:56:39,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:56:42,392 INFO L134 CoverageAnalysis]: Checked inductivity of 60360 backedges. 0 proven. 1388 refuted. 0 times theorem prover too weak. 58972 trivial. 0 not checked. [2023-11-29 06:56:42,392 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:56:43,613 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 06:56:43,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 11 [2023-11-29 06:56:44,051 INFO L134 CoverageAnalysis]: Checked inductivity of 60360 backedges. 122 proven. 1266 refuted. 0 times theorem prover too weak. 58972 trivial. 0 not checked. [2023-11-29 06:56:44,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297843250] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:56:44,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:56:44,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [272, 13, 13] total 296 [2023-11-29 06:56:44,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270888877] [2023-11-29 06:56:44,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:56:44,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 296 states [2023-11-29 06:56:44,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:56:44,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 296 interpolants. [2023-11-29 06:56:44,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37217, Invalid=50103, Unknown=0, NotChecked=0, Total=87320 [2023-11-29 06:56:44,062 INFO L87 Difference]: Start difference. First operand 673 states and 675 transitions. Second operand has 296 states, 296 states have (on average 1.2195945945945945) internal successors, (361), 296 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:57:18,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:57:18,371 INFO L93 Difference]: Finished difference Result 1082 states and 1087 transitions. [2023-11-29 06:57:18,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 289 states. [2023-11-29 06:57:18,372 INFO L78 Accepts]: Start accepts. Automaton has has 296 states, 296 states have (on average 1.2195945945945945) internal successors, (361), 296 states have internal predecessors, (361), 0 states have call successors, (0), 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 672 [2023-11-29 06:57:18,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:57:18,376 INFO L225 Difference]: With dead ends: 1082 [2023-11-29 06:57:18,376 INFO L226 Difference]: Without dead ends: 681 [2023-11-29 06:57:18,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1891 GetRequests, 1320 SyntacticMatches, 0 SemanticMatches, 571 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45720 ImplicationChecksByTransitivity, 61.9s TimeCoverageRelationStatistics Valid=111534, Invalid=216222, Unknown=0, NotChecked=0, Total=327756 [2023-11-29 06:57:18,397 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 55 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 06:57:18,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 267 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 06:57:18,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2023-11-29 06:57:18,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 679. [2023-11-29 06:57:18,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 678 states have (on average 1.0044247787610618) internal successors, (681), 678 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:57:18,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 681 transitions. [2023-11-29 06:57:18,471 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 681 transitions. Word has length 672 [2023-11-29 06:57:18,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:57:18,472 INFO L495 AbstractCegarLoop]: Abstraction has 679 states and 681 transitions. [2023-11-29 06:57:18,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 296 states, 296 states have (on average 1.2195945945945945) internal successors, (361), 296 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:57:18,472 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 681 transitions. [2023-11-29 06:57:18,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 679 [2023-11-29 06:57:18,478 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:57:18,478 INFO L195 NwaCegarLoop]: trace histogram [271, 126, 126, 126, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:57:18,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-29 06:57:18,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:57:18,679 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:57:18,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:57:18,679 INFO L85 PathProgramCache]: Analyzing trace with hash -611128419, now seen corresponding path program 10 times [2023-11-29 06:57:18,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:57:18,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856312488] [2023-11-29 06:57:18,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:57:18,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:57:19,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:15,961 INFO L134 CoverageAnalysis]: Checked inductivity of 60649 backedges. 0 proven. 36856 refuted. 0 times theorem prover too weak. 23793 trivial. 0 not checked. [2023-11-29 06:58:15,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:15,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856312488] [2023-11-29 06:58:15,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856312488] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:58:15,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305923218] [2023-11-29 06:58:15,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:58:15,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:58:15,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:58:15,963 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:58:15,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 06:58:16,799 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:58:16,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:58:16,814 INFO L262 TraceCheckSpWp]: Trace formula consists of 3436 conjuncts, 128 conjunts are in the unsatisfiable core [2023-11-29 06:58:16,823 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:58:34,491 INFO L134 CoverageAnalysis]: Checked inductivity of 60649 backedges. 0 proven. 23751 refuted. 0 times theorem prover too weak. 36898 trivial. 0 not checked. [2023-11-29 06:58:34,491 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:59:01,788 INFO L134 CoverageAnalysis]: Checked inductivity of 60649 backedges. 0 proven. 23751 refuted. 0 times theorem prover too weak. 36898 trivial. 0 not checked. [2023-11-29 06:59:01,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305923218] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:59:01,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:59:01,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [273, 129, 129] total 528 [2023-11-29 06:59:01,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108913703] [2023-11-29 06:59:01,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:59:01,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 528 states [2023-11-29 06:59:01,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:59:01,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 528 interpolants. [2023-11-29 06:59:01,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70040, Invalid=208216, Unknown=0, NotChecked=0, Total=278256 [2023-11-29 06:59:01,814 INFO L87 Difference]: Start difference. First operand 679 states and 681 transitions. Second operand has 528 states, 528 states have (on average 1.9867424242424243) internal successors, (1049), 528 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:00:32,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:00:32,010 INFO L93 Difference]: Finished difference Result 3216 states and 3348 transitions. [2023-11-29 07:00:32,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 528 states. [2023-11-29 07:00:32,011 INFO L78 Accepts]: Start accepts. Automaton has has 528 states, 528 states have (on average 1.9867424242424243) internal successors, (1049), 528 states have internal predecessors, (1049), 0 states have call successors, (0), 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 678 [2023-11-29 07:00:32,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:00:32,027 INFO L225 Difference]: With dead ends: 3216 [2023-11-29 07:00:32,027 INFO L226 Difference]: Without dead ends: 2810 [2023-11-29 07:00:32,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1627 GetRequests, 1101 SyntacticMatches, 0 SemanticMatches, 526 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68834 ImplicationChecksByTransitivity, 72.1s TimeCoverageRelationStatistics Valid=70040, Invalid=208216, Unknown=0, NotChecked=0, Total=278256 [2023-11-29 07:00:32,048 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 9326 mSDsluCounter, 1329 mSDsCounter, 0 mSdLazyCounter, 1624 mSolverCounterSat, 1564 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9326 SdHoareTripleChecker+Valid, 1338 SdHoareTripleChecker+Invalid, 3188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1564 IncrementalHoareTripleChecker+Valid, 1624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-29 07:00:32,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9326 Valid, 1338 Invalid, 3188 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1564 Valid, 1624 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-29 07:00:32,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2810 states. [2023-11-29 07:00:32,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2810 to 1064. [2023-11-29 07:00:32,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1064 states, 1063 states have (on average 1.0028222013170274) internal successors, (1066), 1063 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:00:32,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1066 transitions. [2023-11-29 07:00:32,173 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1066 transitions. Word has length 678 [2023-11-29 07:00:32,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:00:32,173 INFO L495 AbstractCegarLoop]: Abstraction has 1064 states and 1066 transitions. [2023-11-29 07:00:32,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 528 states, 528 states have (on average 1.9867424242424243) internal successors, (1049), 528 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:00:32,175 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1066 transitions. [2023-11-29 07:00:32,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1064 [2023-11-29 07:00:32,185 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:00:32,186 INFO L195 NwaCegarLoop]: trace histogram [272, 254, 254, 254, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:00:32,198 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 07:00:32,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:00:32,387 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:00:32,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:00:32,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1250534142, now seen corresponding path program 11 times [2023-11-29 07:00:32,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:00:32,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870633126] [2023-11-29 07:00:32,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:00:32,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:00:32,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:01:40,554 INFO L134 CoverageAnalysis]: Checked inductivity of 133817 backedges. 0 proven. 37128 refuted. 0 times theorem prover too weak. 96689 trivial. 0 not checked. [2023-11-29 07:01:40,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:01:40,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870633126] [2023-11-29 07:01:40,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870633126] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:01:40,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154925241] [2023-11-29 07:01:40,555 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 07:01:40,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:01:40,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:01:40,556 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:01:40,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f9457-8ba0-455b-b9a6-8c9dda8525f6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process