./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 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_2ee24567-de57-4421-802b-6787b120228b/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee24567-de57-4421-802b-6787b120228b/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee24567-de57-4421-802b-6787b120228b/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee24567-de57-4421-802b-6787b120228b/bin/uautomizer-verify-bycVGegfSx/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee24567-de57-4421-802b-6787b120228b/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee24567-de57-4421-802b-6787b120228b/bin/uautomizer-verify-bycVGegfSx --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 e296f9d0ac3a11e23992c5bf18917d5440a5485ef02dc07f1520f584e052eef8 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:13:24,821 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:13:24,935 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee24567-de57-4421-802b-6787b120228b/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-21 22:13:24,939 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:13:24,940 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:13:24,969 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:13:24,971 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:13:24,971 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:13:24,972 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-21 22:13:24,977 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-21 22:13:24,978 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:13:24,979 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:13:24,979 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:13:24,981 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:13:24,981 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:13:24,982 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:13:24,982 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 22:13:24,983 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:13:24,983 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:13:24,984 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:13:24,984 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:13:24,985 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 22:13:24,985 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:13:24,985 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 22:13:24,986 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:13:24,986 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 22:13:24,987 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:13:24,988 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:13:24,988 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:13:24,989 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:13:24,990 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:13:24,990 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:13:24,990 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:13:24,991 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:13:24,991 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 22:13:24,991 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:13:24,991 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:13:24,992 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:13:24,992 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:13:24,992 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 22:13:24,992 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:13:24,993 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:13:24,993 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_2ee24567-de57-4421-802b-6787b120228b/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee24567-de57-4421-802b-6787b120228b/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e296f9d0ac3a11e23992c5bf18917d5440a5485ef02dc07f1520f584e052eef8 [2023-11-21 22:13:25,287 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:13:25,316 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:13:25,319 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:13:25,320 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:13:25,321 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:13:25,322 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee24567-de57-4421-802b-6787b120228b/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2023-11-21 22:13:28,453 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:13:28,686 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:13:28,687 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee24567-de57-4421-802b-6787b120228b/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2023-11-21 22:13:28,700 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee24567-de57-4421-802b-6787b120228b/bin/uautomizer-verify-bycVGegfSx/data/3eef141b1/9794004569ae495580b3b8a3c7b4709b/FLAGe2a44de39 [2023-11-21 22:13:28,715 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee24567-de57-4421-802b-6787b120228b/bin/uautomizer-verify-bycVGegfSx/data/3eef141b1/9794004569ae495580b3b8a3c7b4709b [2023-11-21 22:13:28,718 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:13:28,719 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:13:28,723 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:13:28,724 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:13:28,729 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:13:28,734 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:13:28" (1/1) ... [2023-11-21 22:13:28,735 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b62d802 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:28, skipping insertion in model container [2023-11-21 22:13:28,735 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:13:28" (1/1) ... [2023-11-21 22:13:28,788 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:13:29,018 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_2ee24567-de57-4421-802b-6787b120228b/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7235,7248] [2023-11-21 22:13:29,079 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:13:29,111 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:13:29,174 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_2ee24567-de57-4421-802b-6787b120228b/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7235,7248] [2023-11-21 22:13:29,214 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:13:29,246 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:13:29,247 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:29 WrapperNode [2023-11-21 22:13:29,247 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:13:29,248 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:13:29,249 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:13:29,249 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:13:29,257 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:29" (1/1) ... [2023-11-21 22:13:29,284 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:29" (1/1) ... [2023-11-21 22:13:29,338 INFO L138 Inliner]: procedures = 22, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 624 [2023-11-21 22:13:29,339 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:13:29,339 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:13:29,340 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:13:29,340 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:13:29,355 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:29" (1/1) ... [2023-11-21 22:13:29,356 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:29" (1/1) ... [2023-11-21 22:13:29,360 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:29" (1/1) ... [2023-11-21 22:13:29,376 INFO L187 HeapSplitter]: Split 2 memory accesses to 1 slices as follows [2] [2023-11-21 22:13:29,376 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:29" (1/1) ... [2023-11-21 22:13:29,377 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:29" (1/1) ... [2023-11-21 22:13:29,389 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:29" (1/1) ... [2023-11-21 22:13:29,395 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:29" (1/1) ... [2023-11-21 22:13:29,399 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:29" (1/1) ... [2023-11-21 22:13:29,402 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:29" (1/1) ... [2023-11-21 22:13:29,407 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:13:29,408 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:13:29,408 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:13:29,408 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:13:29,409 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:29" (1/1) ... [2023-11-21 22:13:29,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:13:29,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee24567-de57-4421-802b-6787b120228b/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:13:29,463 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee24567-de57-4421-802b-6787b120228b/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:13:29,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee24567-de57-4421-802b-6787b120228b/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:13:29,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:13:29,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-21 22:13:29,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:13:29,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:13:29,696 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:13:29,699 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:13:30,388 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:13:30,789 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:13:30,789 INFO L308 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-21 22:13:30,791 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:13:30 BoogieIcfgContainer [2023-11-21 22:13:30,791 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:13:30,798 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:13:30,798 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:13:30,801 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:13:30,801 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:13:28" (1/3) ... [2023-11-21 22:13:30,802 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@360e8c12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:13:30, skipping insertion in model container [2023-11-21 22:13:30,802 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:29" (2/3) ... [2023-11-21 22:13:30,804 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@360e8c12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:13:30, skipping insertion in model container [2023-11-21 22:13:30,804 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:13:30" (3/3) ... [2023-11-21 22:13:30,806 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2023-11-21 22:13:30,825 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:13:30,825 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 22:13:30,885 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:13:30,891 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;@51f4a31, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:13:30,891 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 22:13:30,896 INFO L276 IsEmpty]: Start isEmpty. Operand has 93 states, 85 states have (on average 1.776470588235294) internal successors, (151), 92 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:30,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-21 22:13:30,904 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:30,905 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:13:30,905 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:30,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:30,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1203894572, now seen corresponding path program 1 times [2023-11-21 22:13:30,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:30,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759660619] [2023-11-21 22:13:30,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:30,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:31,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:31,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:31,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:31,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759660619] [2023-11-21 22:13:31,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759660619] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:13:31,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:13:31,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:13:31,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462991958] [2023-11-21 22:13:31,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:13:31,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:13:31,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:31,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:13:31,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:13:31,497 INFO L87 Difference]: Start difference. First operand has 93 states, 85 states have (on average 1.776470588235294) internal successors, (151), 92 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:31,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:31,632 INFO L93 Difference]: Finished difference Result 209 states and 320 transitions. [2023-11-21 22:13:31,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:13:31,635 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-11-21 22:13:31,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:31,649 INFO L225 Difference]: With dead ends: 209 [2023-11-21 22:13:31,649 INFO L226 Difference]: Without dead ends: 129 [2023-11-21 22:13:31,652 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 [2023-11-21 22:13:31,657 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 93 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:31,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 325 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:13:31,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-11-21 22:13:31,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 127. [2023-11-21 22:13:31,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.4126984126984128) internal successors, (178), 126 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:31,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 178 transitions. [2023-11-21 22:13:31,726 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 178 transitions. Word has length 38 [2023-11-21 22:13:31,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:31,727 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 178 transitions. [2023-11-21 22:13:31,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:31,728 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 178 transitions. [2023-11-21 22:13:31,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-21 22:13:31,730 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:31,730 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:13:31,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 22:13:31,731 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:31,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:31,732 INFO L85 PathProgramCache]: Analyzing trace with hash -193135057, now seen corresponding path program 1 times [2023-11-21 22:13:31,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:31,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701730176] [2023-11-21 22:13:31,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:31,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:31,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:31,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:31,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:31,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701730176] [2023-11-21 22:13:31,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701730176] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:13:31,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:13:31,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:13:31,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611109076] [2023-11-21 22:13:31,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:13:31,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:13:31,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:31,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:13:31,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:13:31,981 INFO L87 Difference]: Start difference. First operand 127 states and 178 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:32,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:32,059 INFO L93 Difference]: Finished difference Result 272 states and 397 transitions. [2023-11-21 22:13:32,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:13:32,060 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-11-21 22:13:32,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:32,066 INFO L225 Difference]: With dead ends: 272 [2023-11-21 22:13:32,066 INFO L226 Difference]: Without dead ends: 174 [2023-11-21 22:13:32,069 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 [2023-11-21 22:13:32,071 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 77 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:32,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 168 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:13:32,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2023-11-21 22:13:32,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2023-11-21 22:13:32,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.4210526315789473) internal successors, (243), 171 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:32,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 243 transitions. [2023-11-21 22:13:32,100 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 243 transitions. Word has length 40 [2023-11-21 22:13:32,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:32,100 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 243 transitions. [2023-11-21 22:13:32,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:32,101 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 243 transitions. [2023-11-21 22:13:32,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-21 22:13:32,105 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:32,105 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:13:32,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 22:13:32,106 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:32,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:32,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1952602460, now seen corresponding path program 1 times [2023-11-21 22:13:32,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:32,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026739759] [2023-11-21 22:13:32,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:32,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:32,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:32,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:32,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:32,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026739759] [2023-11-21 22:13:32,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026739759] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:13:32,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:13:32,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:13:32,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621089724] [2023-11-21 22:13:32,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:13:32,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:13:32,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:32,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:13:32,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:13:32,246 INFO L87 Difference]: Start difference. First operand 172 states and 243 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:32,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:32,291 INFO L93 Difference]: Finished difference Result 418 states and 610 transitions. [2023-11-21 22:13:32,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:13:32,292 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-11-21 22:13:32,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:32,294 INFO L225 Difference]: With dead ends: 418 [2023-11-21 22:13:32,294 INFO L226 Difference]: Without dead ends: 277 [2023-11-21 22:13:32,300 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 [2023-11-21 22:13:32,306 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 77 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:32,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 233 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:13:32,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2023-11-21 22:13:32,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 275. [2023-11-21 22:13:32,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 1.437956204379562) internal successors, (394), 274 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:32,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 394 transitions. [2023-11-21 22:13:32,360 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 394 transitions. Word has length 42 [2023-11-21 22:13:32,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:32,362 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 394 transitions. [2023-11-21 22:13:32,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:32,362 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 394 transitions. [2023-11-21 22:13:32,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-21 22:13:32,365 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:32,365 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:13:32,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 22:13:32,366 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:32,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:32,367 INFO L85 PathProgramCache]: Analyzing trace with hash -129986801, now seen corresponding path program 1 times [2023-11-21 22:13:32,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:32,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052810876] [2023-11-21 22:13:32,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:32,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:32,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:32,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:32,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:32,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052810876] [2023-11-21 22:13:32,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052810876] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:13:32,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:13:32,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:13:32,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353580252] [2023-11-21 22:13:32,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:13:32,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:13:32,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:32,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:13:32,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:13:32,475 INFO L87 Difference]: Start difference. First operand 275 states and 394 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 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) [2023-11-21 22:13:32,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:32,508 INFO L93 Difference]: Finished difference Result 673 states and 988 transitions. [2023-11-21 22:13:32,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:13:32,509 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-11-21 22:13:32,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:32,514 INFO L225 Difference]: With dead ends: 673 [2023-11-21 22:13:32,514 INFO L226 Difference]: Without dead ends: 429 [2023-11-21 22:13:32,516 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 [2023-11-21 22:13:32,522 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 76 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:32,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 201 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:13:32,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2023-11-21 22:13:32,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 427. [2023-11-21 22:13:32,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 1.4577464788732395) internal successors, (621), 426 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:32,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 621 transitions. [2023-11-21 22:13:32,547 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 621 transitions. Word has length 44 [2023-11-21 22:13:32,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:32,549 INFO L495 AbstractCegarLoop]: Abstraction has 427 states and 621 transitions. [2023-11-21 22:13:32,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 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) [2023-11-21 22:13:32,549 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 621 transitions. [2023-11-21 22:13:32,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-21 22:13:32,554 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:32,555 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:13:32,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 22:13:32,555 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:32,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:32,558 INFO L85 PathProgramCache]: Analyzing trace with hash 305400130, now seen corresponding path program 1 times [2023-11-21 22:13:32,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:32,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653378191] [2023-11-21 22:13:32,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:32,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:32,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:32,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:32,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:32,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653378191] [2023-11-21 22:13:32,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653378191] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:13:32,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:13:32,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:13:32,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559730932] [2023-11-21 22:13:32,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:13:32,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:13:32,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:32,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:13:32,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:13:32,671 INFO L87 Difference]: Start difference. First operand 427 states and 621 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:32,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:32,711 INFO L93 Difference]: Finished difference Result 1085 states and 1592 transitions. [2023-11-21 22:13:32,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:13:32,712 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2023-11-21 22:13:32,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:32,720 INFO L225 Difference]: With dead ends: 1085 [2023-11-21 22:13:32,721 INFO L226 Difference]: Without dead ends: 702 [2023-11-21 22:13:32,721 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 [2023-11-21 22:13:32,722 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 72 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:32,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 214 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:13:32,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2023-11-21 22:13:32,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 700. [2023-11-21 22:13:32,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 699 states have (on average 1.446351931330472) internal successors, (1011), 699 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:32,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 1011 transitions. [2023-11-21 22:13:32,744 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 1011 transitions. Word has length 46 [2023-11-21 22:13:32,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:32,744 INFO L495 AbstractCegarLoop]: Abstraction has 700 states and 1011 transitions. [2023-11-21 22:13:32,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:32,744 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 1011 transitions. [2023-11-21 22:13:32,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-21 22:13:32,746 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:32,747 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:13:32,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 22:13:32,747 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:32,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:32,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1581532322, now seen corresponding path program 1 times [2023-11-21 22:13:32,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:32,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893566265] [2023-11-21 22:13:32,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:32,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:32,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:32,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:32,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:32,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893566265] [2023-11-21 22:13:32,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893566265] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:13:32,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:13:32,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:13:32,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616643507] [2023-11-21 22:13:32,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:13:32,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:13:32,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:32,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:13:32,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:13:32,858 INFO L87 Difference]: Start difference. First operand 700 states and 1011 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:32,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:32,897 INFO L93 Difference]: Finished difference Result 1752 states and 2562 transitions. [2023-11-21 22:13:32,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:13:32,898 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2023-11-21 22:13:32,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:32,908 INFO L225 Difference]: With dead ends: 1752 [2023-11-21 22:13:32,910 INFO L226 Difference]: Without dead ends: 1096 [2023-11-21 22:13:32,912 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 [2023-11-21 22:13:32,914 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 71 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:32,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 203 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:13:32,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2023-11-21 22:13:32,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 1094. [2023-11-21 22:13:32,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1093 states have (on average 1.455626715462031) internal successors, (1591), 1093 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:32,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 1591 transitions. [2023-11-21 22:13:32,970 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 1591 transitions. Word has length 48 [2023-11-21 22:13:32,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:32,975 INFO L495 AbstractCegarLoop]: Abstraction has 1094 states and 1591 transitions. [2023-11-21 22:13:32,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:32,976 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 1591 transitions. [2023-11-21 22:13:32,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-21 22:13:32,978 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:32,978 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:13:32,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-21 22:13:32,979 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:32,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:32,979 INFO L85 PathProgramCache]: Analyzing trace with hash -256432369, now seen corresponding path program 1 times [2023-11-21 22:13:32,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:32,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318927077] [2023-11-21 22:13:32,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:32,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:33,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:33,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:33,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:33,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318927077] [2023-11-21 22:13:33,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318927077] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:13:33,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:13:33,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 22:13:33,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689918000] [2023-11-21 22:13:33,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:13:33,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:13:33,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:33,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:13:33,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:13:33,127 INFO L87 Difference]: Start difference. First operand 1094 states and 1591 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:33,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:33,323 INFO L93 Difference]: Finished difference Result 3454 states and 5056 transitions. [2023-11-21 22:13:33,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 22:13:33,323 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2023-11-21 22:13:33,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:33,339 INFO L225 Difference]: With dead ends: 3454 [2023-11-21 22:13:33,339 INFO L226 Difference]: Without dead ends: 2399 [2023-11-21 22:13:33,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:13:33,342 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 439 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:33,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 811 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:13:33,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2399 states. [2023-11-21 22:13:33,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2399 to 1706. [2023-11-21 22:13:33,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1706 states, 1705 states have (on average 1.4609970674486803) internal successors, (2491), 1705 states have internal predecessors, (2491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:33,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1706 states to 1706 states and 2491 transitions. [2023-11-21 22:13:33,395 INFO L78 Accepts]: Start accepts. Automaton has 1706 states and 2491 transitions. Word has length 50 [2023-11-21 22:13:33,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:33,396 INFO L495 AbstractCegarLoop]: Abstraction has 1706 states and 2491 transitions. [2023-11-21 22:13:33,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:33,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1706 states and 2491 transitions. [2023-11-21 22:13:33,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-21 22:13:33,397 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:33,397 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:13:33,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-21 22:13:33,398 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:33,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:33,398 INFO L85 PathProgramCache]: Analyzing trace with hash 578026953, now seen corresponding path program 1 times [2023-11-21 22:13:33,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:33,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911067854] [2023-11-21 22:13:33,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:33,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:33,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:33,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:33,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:33,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911067854] [2023-11-21 22:13:33,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911067854] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:13:33,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:13:33,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:13:33,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916305480] [2023-11-21 22:13:33,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:13:33,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:13:33,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:33,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:13:33,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:13:33,519 INFO L87 Difference]: Start difference. First operand 1706 states and 2491 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:33,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:33,594 INFO L93 Difference]: Finished difference Result 4008 states and 5872 transitions. [2023-11-21 22:13:33,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:13:33,595 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2023-11-21 22:13:33,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:33,642 INFO L225 Difference]: With dead ends: 4008 [2023-11-21 22:13:33,643 INFO L226 Difference]: Without dead ends: 2359 [2023-11-21 22:13:33,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:13:33,646 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 145 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:33,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 297 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:13:33,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2359 states. [2023-11-21 22:13:33,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2359 to 2354. [2023-11-21 22:13:33,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2354 states, 2353 states have (on average 1.4594135146621334) internal successors, (3434), 2353 states have internal predecessors, (3434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:33,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2354 states to 2354 states and 3434 transitions. [2023-11-21 22:13:33,710 INFO L78 Accepts]: Start accepts. Automaton has 2354 states and 3434 transitions. Word has length 51 [2023-11-21 22:13:33,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:33,711 INFO L495 AbstractCegarLoop]: Abstraction has 2354 states and 3434 transitions. [2023-11-21 22:13:33,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:33,711 INFO L276 IsEmpty]: Start isEmpty. Operand 2354 states and 3434 transitions. [2023-11-21 22:13:33,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-21 22:13:33,711 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:33,711 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:13:33,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-21 22:13:33,712 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:33,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:33,712 INFO L85 PathProgramCache]: Analyzing trace with hash 416534526, now seen corresponding path program 1 times [2023-11-21 22:13:33,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:33,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501077063] [2023-11-21 22:13:33,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:33,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:33,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:33,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:33,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:33,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501077063] [2023-11-21 22:13:33,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501077063] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:13:33,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:13:33,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 22:13:33,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534722167] [2023-11-21 22:13:33,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:13:33,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:13:33,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:33,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:13:33,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:13:33,994 INFO L87 Difference]: Start difference. First operand 2354 states and 3434 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:34,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:34,083 INFO L93 Difference]: Finished difference Result 3976 states and 5743 transitions. [2023-11-21 22:13:34,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 22:13:34,084 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-11-21 22:13:34,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:34,104 INFO L225 Difference]: With dead ends: 3976 [2023-11-21 22:13:34,104 INFO L226 Difference]: Without dead ends: 3974 [2023-11-21 22:13:34,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:13:34,111 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 148 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:34,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 576 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:13:34,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3974 states. [2023-11-21 22:13:34,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3974 to 2406. [2023-11-21 22:13:34,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2406 states, 2405 states have (on average 1.4378378378378378) internal successors, (3458), 2405 states have internal predecessors, (3458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:34,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2406 states to 2406 states and 3458 transitions. [2023-11-21 22:13:34,224 INFO L78 Accepts]: Start accepts. Automaton has 2406 states and 3458 transitions. Word has length 59 [2023-11-21 22:13:34,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:34,225 INFO L495 AbstractCegarLoop]: Abstraction has 2406 states and 3458 transitions. [2023-11-21 22:13:34,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:34,225 INFO L276 IsEmpty]: Start isEmpty. Operand 2406 states and 3458 transitions. [2023-11-21 22:13:34,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-21 22:13:34,226 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:34,226 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:13:34,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-21 22:13:34,227 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:34,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:34,227 INFO L85 PathProgramCache]: Analyzing trace with hash 19052562, now seen corresponding path program 1 times [2023-11-21 22:13:34,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:34,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594316152] [2023-11-21 22:13:34,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:34,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:34,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:35,724 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 22:13:35,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:35,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594316152] [2023-11-21 22:13:35,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594316152] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:13:35,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216603931] [2023-11-21 22:13:35,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:35,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:35,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee24567-de57-4421-802b-6787b120228b/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:13:35,730 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee24567-de57-4421-802b-6787b120228b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:13:35,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee24567-de57-4421-802b-6787b120228b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 22:13:35,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:35,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-21 22:13:35,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:13:37,280 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-21 22:13:37,280 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:13:37,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216603931] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:13:37,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:13:37,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 19 [2023-11-21 22:13:37,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137256575] [2023-11-21 22:13:37,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:13:37,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-21 22:13:37,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:37,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-21 22:13:37,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2023-11-21 22:13:37,286 INFO L87 Difference]: Start difference. First operand 2406 states and 3458 transitions. Second operand has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:37,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:37,774 INFO L93 Difference]: Finished difference Result 4839 states and 6961 transitions. [2023-11-21 22:13:37,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-21 22:13:37,775 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-11-21 22:13:37,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:37,788 INFO L225 Difference]: With dead ends: 4839 [2023-11-21 22:13:37,788 INFO L226 Difference]: Without dead ends: 2475 [2023-11-21 22:13:37,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=174, Invalid=378, Unknown=0, NotChecked=0, Total=552 [2023-11-21 22:13:37,792 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 842 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:37,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [842 Valid, 830 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 22:13:37,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2475 states. [2023-11-21 22:13:37,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2475 to 2471. [2023-11-21 22:13:37,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2471 states, 2470 states have (on average 1.4360323886639677) internal successors, (3547), 2470 states have internal predecessors, (3547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:37,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2471 states to 2471 states and 3547 transitions. [2023-11-21 22:13:37,863 INFO L78 Accepts]: Start accepts. Automaton has 2471 states and 3547 transitions. Word has length 67 [2023-11-21 22:13:37,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:37,863 INFO L495 AbstractCegarLoop]: Abstraction has 2471 states and 3547 transitions. [2023-11-21 22:13:37,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:37,864 INFO L276 IsEmpty]: Start isEmpty. Operand 2471 states and 3547 transitions. [2023-11-21 22:13:37,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-21 22:13:37,865 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:37,865 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:13:37,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee24567-de57-4421-802b-6787b120228b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 22:13:38,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee24567-de57-4421-802b-6787b120228b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-21 22:13:38,078 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:38,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:38,079 INFO L85 PathProgramCache]: Analyzing trace with hash 544279997, now seen corresponding path program 1 times [2023-11-21 22:13:38,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:38,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842200055] [2023-11-21 22:13:38,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:38,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:38,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:38,253 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-21 22:13:38,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:38,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842200055] [2023-11-21 22:13:38,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842200055] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:13:38,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:13:38,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:13:38,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440956217] [2023-11-21 22:13:38,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:13:38,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:13:38,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:38,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:13:38,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:13:38,255 INFO L87 Difference]: Start difference. First operand 2471 states and 3547 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:38,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:38,342 INFO L93 Difference]: Finished difference Result 4906 states and 7055 transitions. [2023-11-21 22:13:38,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:13:38,343 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2023-11-21 22:13:38,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:38,355 INFO L225 Difference]: With dead ends: 4906 [2023-11-21 22:13:38,356 INFO L226 Difference]: Without dead ends: 2471 [2023-11-21 22:13:38,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:13:38,360 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 281 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:38,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 99 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:13:38,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2023-11-21 22:13:38,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 2471. [2023-11-21 22:13:38,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2471 states, 2470 states have (on average 1.4064777327935223) internal successors, (3474), 2470 states have internal predecessors, (3474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:38,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2471 states to 2471 states and 3474 transitions. [2023-11-21 22:13:38,423 INFO L78 Accepts]: Start accepts. Automaton has 2471 states and 3474 transitions. Word has length 70 [2023-11-21 22:13:38,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:38,424 INFO L495 AbstractCegarLoop]: Abstraction has 2471 states and 3474 transitions. [2023-11-21 22:13:38,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:38,424 INFO L276 IsEmpty]: Start isEmpty. Operand 2471 states and 3474 transitions. [2023-11-21 22:13:38,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-21 22:13:38,430 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:38,430 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:13:38,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-21 22:13:38,430 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:38,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:38,431 INFO L85 PathProgramCache]: Analyzing trace with hash 41235170, now seen corresponding path program 1 times [2023-11-21 22:13:38,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:38,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693443140] [2023-11-21 22:13:38,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:38,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:38,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:39,740 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 22:13:39,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:39,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693443140] [2023-11-21 22:13:39,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693443140] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:13:39,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925490203] [2023-11-21 22:13:39,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:39,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:39,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee24567-de57-4421-802b-6787b120228b/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:13:39,743 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee24567-de57-4421-802b-6787b120228b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:13:39,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee24567-de57-4421-802b-6787b120228b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 22:13:39,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:39,903 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-21 22:13:39,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:13:41,075 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-21 22:13:41,076 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:13:41,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925490203] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:13:41,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:13:41,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 19 [2023-11-21 22:13:41,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604197775] [2023-11-21 22:13:41,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:13:41,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-21 22:13:41,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:41,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-21 22:13:41,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2023-11-21 22:13:41,079 INFO L87 Difference]: Start difference. First operand 2471 states and 3474 transitions. Second operand has 11 states, 11 states have (on average 6.181818181818182) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:41,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:41,619 INFO L93 Difference]: Finished difference Result 4986 states and 7013 transitions. [2023-11-21 22:13:41,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-21 22:13:41,620 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.181818181818182) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2023-11-21 22:13:41,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:41,634 INFO L225 Difference]: With dead ends: 4986 [2023-11-21 22:13:41,634 INFO L226 Difference]: Without dead ends: 2588 [2023-11-21 22:13:41,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2023-11-21 22:13:41,638 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 728 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 932 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:41,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [728 Valid, 932 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 22:13:41,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2588 states. [2023-11-21 22:13:41,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2588 to 2584. [2023-11-21 22:13:41,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2584 states, 2583 states have (on average 1.4030197444831591) internal successors, (3624), 2583 states have internal predecessors, (3624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:41,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2584 states to 2584 states and 3624 transitions. [2023-11-21 22:13:41,707 INFO L78 Accepts]: Start accepts. Automaton has 2584 states and 3624 transitions. Word has length 70 [2023-11-21 22:13:41,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:41,707 INFO L495 AbstractCegarLoop]: Abstraction has 2584 states and 3624 transitions. [2023-11-21 22:13:41,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.181818181818182) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:41,708 INFO L276 IsEmpty]: Start isEmpty. Operand 2584 states and 3624 transitions. [2023-11-21 22:13:41,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-21 22:13:41,709 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:41,709 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:13:41,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee24567-de57-4421-802b-6787b120228b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 22:13:41,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee24567-de57-4421-802b-6787b120228b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:41,923 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:41,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:41,924 INFO L85 PathProgramCache]: Analyzing trace with hash 668513300, now seen corresponding path program 1 times [2023-11-21 22:13:41,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:41,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670476906] [2023-11-21 22:13:41,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:41,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:42,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:43,291 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 22:13:43,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:43,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670476906] [2023-11-21 22:13:43,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670476906] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:13:43,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39766202] [2023-11-21 22:13:43,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:43,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:43,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee24567-de57-4421-802b-6787b120228b/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:13:43,294 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee24567-de57-4421-802b-6787b120228b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:13:43,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee24567-de57-4421-802b-6787b120228b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 22:13:43,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:43,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-21 22:13:43,448 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:13:43,989 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-21 22:13:43,989 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:13:43,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39766202] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:13:43,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:13:43,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 15 [2023-11-21 22:13:43,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67128744] [2023-11-21 22:13:43,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:13:43,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 22:13:43,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:43,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 22:13:43,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-11-21 22:13:43,996 INFO L87 Difference]: Start difference. First operand 2584 states and 3624 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:44,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:44,194 INFO L93 Difference]: Finished difference Result 8144 states and 11426 transitions. [2023-11-21 22:13:44,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 22:13:44,194 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2023-11-21 22:13:44,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:44,225 INFO L225 Difference]: With dead ends: 8144 [2023-11-21 22:13:44,225 INFO L226 Difference]: Without dead ends: 5650 [2023-11-21 22:13:44,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2023-11-21 22:13:44,230 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 309 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:44,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 480 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:13:44,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5650 states. [2023-11-21 22:13:44,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5650 to 5274. [2023-11-21 22:13:44,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5274 states, 5273 states have (on average 1.4029963967380998) internal successors, (7398), 5273 states have internal predecessors, (7398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:44,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5274 states to 5274 states and 7398 transitions. [2023-11-21 22:13:44,385 INFO L78 Accepts]: Start accepts. Automaton has 5274 states and 7398 transitions. Word has length 70 [2023-11-21 22:13:44,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:44,386 INFO L495 AbstractCegarLoop]: Abstraction has 5274 states and 7398 transitions. [2023-11-21 22:13:44,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:44,386 INFO L276 IsEmpty]: Start isEmpty. Operand 5274 states and 7398 transitions. [2023-11-21 22:13:44,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-21 22:13:44,387 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:44,388 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:13:44,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee24567-de57-4421-802b-6787b120228b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 22:13:44,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee24567-de57-4421-802b-6787b120228b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:44,602 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:44,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:44,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1068526318, now seen corresponding path program 1 times [2023-11-21 22:13:44,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:44,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634059972] [2023-11-21 22:13:44,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:44,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:44,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:46,147 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 22:13:46,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:46,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634059972] [2023-11-21 22:13:46,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634059972] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:13:46,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105422753] [2023-11-21 22:13:46,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:46,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:46,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee24567-de57-4421-802b-6787b120228b/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:13:46,149 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee24567-de57-4421-802b-6787b120228b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:13:46,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee24567-de57-4421-802b-6787b120228b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 22:13:46,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:46,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-21 22:13:46,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:13:47,313 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 22:13:47,313 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:13:51,676 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 22:13:51,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105422753] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:13:51,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:13:51,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 30 [2023-11-21 22:13:51,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162220457] [2023-11-21 22:13:51,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:13:51,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-21 22:13:51,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:51,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-21 22:13:51,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=676, Unknown=0, NotChecked=0, Total=870 [2023-11-21 22:13:51,680 INFO L87 Difference]: Start difference. First operand 5274 states and 7398 transitions. Second operand has 30 states, 30 states have (on average 6.733333333333333) internal successors, (202), 30 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:57,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:57,170 INFO L93 Difference]: Finished difference Result 27478 states and 38802 transitions. [2023-11-21 22:13:57,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-11-21 22:13:57,178 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 6.733333333333333) internal successors, (202), 30 states have internal predecessors, (202), 0 states have call successors, (0), 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 73 [2023-11-21 22:13:57,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:57,244 INFO L225 Difference]: With dead ends: 27478 [2023-11-21 22:13:57,245 INFO L226 Difference]: Without dead ends: 22487 [2023-11-21 22:13:57,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3787 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1795, Invalid=8305, Unknown=0, NotChecked=0, Total=10100 [2023-11-21 22:13:57,258 INFO L413 NwaCegarLoop]: 286 mSDtfsCounter, 6013 mSDsluCounter, 4614 mSDsCounter, 0 mSdLazyCounter, 1439 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6013 SdHoareTripleChecker+Valid, 4900 SdHoareTripleChecker+Invalid, 1517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:57,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6013 Valid, 4900 Invalid, 1517 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [78 Valid, 1439 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-21 22:13:57,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22487 states. [2023-11-21 22:13:57,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22487 to 13345. [2023-11-21 22:13:57,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13345 states, 13344 states have (on average 1.388189448441247) internal successors, (18524), 13344 states have internal predecessors, (18524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:57,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13345 states to 13345 states and 18524 transitions. [2023-11-21 22:13:57,722 INFO L78 Accepts]: Start accepts. Automaton has 13345 states and 18524 transitions. Word has length 73 [2023-11-21 22:13:57,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:57,722 INFO L495 AbstractCegarLoop]: Abstraction has 13345 states and 18524 transitions. [2023-11-21 22:13:57,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.733333333333333) internal successors, (202), 30 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:57,723 INFO L276 IsEmpty]: Start isEmpty. Operand 13345 states and 18524 transitions. [2023-11-21 22:13:57,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-21 22:13:57,724 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:57,724 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:13:57,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee24567-de57-4421-802b-6787b120228b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 22:13:57,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee24567-de57-4421-802b-6787b120228b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-21 22:13:57,938 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:57,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:57,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1172918310, now seen corresponding path program 1 times [2023-11-21 22:13:57,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:57,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167566340] [2023-11-21 22:13:57,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:57,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:57,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:58,187 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 22:13:58,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:58,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167566340] [2023-11-21 22:13:58,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167566340] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:13:58,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527852096] [2023-11-21 22:13:58,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:58,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:58,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee24567-de57-4421-802b-6787b120228b/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:13:58,190 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee24567-de57-4421-802b-6787b120228b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:13:58,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee24567-de57-4421-802b-6787b120228b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 22:13:58,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:58,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-21 22:13:58,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:13:58,621 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 22:13:58,621 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:13:58,801 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 22:13:58,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527852096] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:13:58,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:13:58,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2023-11-21 22:13:58,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443326086] [2023-11-21 22:13:58,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:13:58,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 22:13:58,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:58,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 22:13:58,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:13:58,804 INFO L87 Difference]: Start difference. First operand 13345 states and 18524 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:58,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:58,963 INFO L93 Difference]: Finished difference Result 29108 states and 40826 transitions. [2023-11-21 22:13:58,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 22:13:58,963 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 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 74 [2023-11-21 22:13:58,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:59,005 INFO L225 Difference]: With dead ends: 29108 [2023-11-21 22:13:59,005 INFO L226 Difference]: Without dead ends: 20192 [2023-11-21 22:13:59,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:13:59,017 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 305 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:59,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 432 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:13:59,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20192 states. [2023-11-21 22:13:59,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20192 to 16494. [2023-11-21 22:13:59,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16494 states, 16493 states have (on average 1.389801734068999) internal successors, (22922), 16493 states have internal predecessors, (22922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:59,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16494 states to 16494 states and 22922 transitions. [2023-11-21 22:13:59,453 INFO L78 Accepts]: Start accepts. Automaton has 16494 states and 22922 transitions. Word has length 74 [2023-11-21 22:13:59,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:59,454 INFO L495 AbstractCegarLoop]: Abstraction has 16494 states and 22922 transitions. [2023-11-21 22:13:59,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:59,455 INFO L276 IsEmpty]: Start isEmpty. Operand 16494 states and 22922 transitions. [2023-11-21 22:13:59,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-21 22:13:59,462 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:59,462 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:13:59,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee24567-de57-4421-802b-6787b120228b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-21 22:13:59,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee24567-de57-4421-802b-6787b120228b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:59,678 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:59,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:59,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1830774204, now seen corresponding path program 1 times [2023-11-21 22:13:59,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:59,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759972333] [2023-11-21 22:13:59,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:59,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:59,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:59,795 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-21 22:13:59,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:59,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759972333] [2023-11-21 22:13:59,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759972333] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:13:59,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:13:59,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:13:59,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594754680] [2023-11-21 22:13:59,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:13:59,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:13:59,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:59,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:13:59,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:13:59,798 INFO L87 Difference]: Start difference. First operand 16494 states and 22922 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:59,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:59,897 INFO L93 Difference]: Finished difference Result 26948 states and 37556 transitions. [2023-11-21 22:13:59,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:13:59,897 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2023-11-21 22:13:59,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:59,928 INFO L225 Difference]: With dead ends: 26948 [2023-11-21 22:13:59,928 INFO L226 Difference]: Without dead ends: 15030 [2023-11-21 22:13:59,941 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 [2023-11-21 22:13:59,942 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 2 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:59,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 204 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:13:59,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15030 states. [2023-11-21 22:14:00,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15030 to 13823. [2023-11-21 22:14:00,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13823 states, 13822 states have (on average 1.370496310230068) internal successors, (18943), 13822 states have internal predecessors, (18943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:14:00,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13823 states to 13823 states and 18943 transitions. [2023-11-21 22:14:00,197 INFO L78 Accepts]: Start accepts. Automaton has 13823 states and 18943 transitions. Word has length 109 [2023-11-21 22:14:00,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:14:00,198 INFO L495 AbstractCegarLoop]: Abstraction has 13823 states and 18943 transitions. [2023-11-21 22:14:00,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:14:00,198 INFO L276 IsEmpty]: Start isEmpty. Operand 13823 states and 18943 transitions. [2023-11-21 22:14:00,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-11-21 22:14:00,204 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:14:00,204 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:14:00,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-21 22:14:00,205 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:14:00,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:14:00,205 INFO L85 PathProgramCache]: Analyzing trace with hash -5735164, now seen corresponding path program 1 times [2023-11-21 22:14:00,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:14:00,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377962984] [2023-11-21 22:14:00,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:14:00,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:14:00,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:00,523 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 47 proven. 26 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-21 22:14:00,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:14:00,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377962984] [2023-11-21 22:14:00,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377962984] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:14:00,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567797314] [2023-11-21 22:14:00,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:14:00,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:14:00,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee24567-de57-4421-802b-6787b120228b/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:14:00,525 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee24567-de57-4421-802b-6787b120228b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:14:00,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee24567-de57-4421-802b-6787b120228b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-21 22:14:00,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:00,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-21 22:14:00,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:14:01,112 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 47 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-21 22:14:01,112 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:14:01,684 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 47 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-21 22:14:01,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567797314] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:14:01,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:14:01,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 10, 8] total 17 [2023-11-21 22:14:01,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362646008] [2023-11-21 22:14:01,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:14:01,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-21 22:14:01,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:14:01,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-21 22:14:01,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2023-11-21 22:14:01,688 INFO L87 Difference]: Start difference. First operand 13823 states and 18943 transitions. Second operand has 17 states, 17 states have (on average 15.647058823529411) internal successors, (266), 17 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:14:02,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:14:02,587 INFO L93 Difference]: Finished difference Result 44729 states and 61903 transitions. [2023-11-21 22:14:02,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-21 22:14:02,587 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 15.647058823529411) internal successors, (266), 17 states have internal predecessors, (266), 0 states have call successors, (0), 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 113 [2023-11-21 22:14:02,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:14:02,673 INFO L225 Difference]: With dead ends: 44729 [2023-11-21 22:14:02,673 INFO L226 Difference]: Without dead ends: 33556 [2023-11-21 22:14:02,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 212 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=252, Invalid=504, Unknown=0, NotChecked=0, Total=756 [2023-11-21 22:14:02,693 INFO L413 NwaCegarLoop]: 400 mSDtfsCounter, 1931 mSDsluCounter, 2437 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1931 SdHoareTripleChecker+Valid, 2837 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 22:14:02,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1931 Valid, 2837 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 22:14:02,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33556 states. [2023-11-21 22:14:03,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33556 to 27033. [2023-11-21 22:14:03,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27033 states, 27032 states have (on average 1.3682302456348032) internal successors, (36986), 27032 states have internal predecessors, (36986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:14:03,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27033 states to 27033 states and 36986 transitions. [2023-11-21 22:14:03,445 INFO L78 Accepts]: Start accepts. Automaton has 27033 states and 36986 transitions. Word has length 113 [2023-11-21 22:14:03,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:14:03,445 INFO L495 AbstractCegarLoop]: Abstraction has 27033 states and 36986 transitions. [2023-11-21 22:14:03,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 15.647058823529411) internal successors, (266), 17 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:14:03,446 INFO L276 IsEmpty]: Start isEmpty. Operand 27033 states and 36986 transitions. [2023-11-21 22:14:03,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-11-21 22:14:03,451 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:14:03,451 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:14:03,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee24567-de57-4421-802b-6787b120228b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-21 22:14:03,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee24567-de57-4421-802b-6787b120228b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-21 22:14:03,679 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:14:03,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:14:03,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1732170505, now seen corresponding path program 1 times [2023-11-21 22:14:03,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:14:03,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808876865] [2023-11-21 22:14:03,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:14:03,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:14:03,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:03,781 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-21 22:14:03,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:14:03,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808876865] [2023-11-21 22:14:03,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808876865] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:14:03,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:14:03,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:14:03,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961838388] [2023-11-21 22:14:03,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:14:03,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:14:03,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:14:03,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:14:03,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:14:03,786 INFO L87 Difference]: Start difference. First operand 27033 states and 36986 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:14:04,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:14:04,134 INFO L93 Difference]: Finished difference Result 78579 states and 107383 transitions. [2023-11-21 22:14:04,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:14:04,135 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2023-11-21 22:14:04,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:14:04,213 INFO L225 Difference]: With dead ends: 78579 [2023-11-21 22:14:04,213 INFO L226 Difference]: Without dead ends: 52215 [2023-11-21 22:14:04,237 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 [2023-11-21 22:14:04,238 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 47 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:14:04,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 252 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:14:04,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52215 states. [2023-11-21 22:14:05,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52215 to 52192. [2023-11-21 22:14:05,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52192 states, 52191 states have (on average 1.3570538981816789) internal successors, (70826), 52191 states have internal predecessors, (70826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:14:05,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52192 states to 52192 states and 70826 transitions. [2023-11-21 22:14:05,926 INFO L78 Accepts]: Start accepts. Automaton has 52192 states and 70826 transitions. Word has length 115 [2023-11-21 22:14:05,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:14:05,927 INFO L495 AbstractCegarLoop]: Abstraction has 52192 states and 70826 transitions. [2023-11-21 22:14:05,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:14:05,927 INFO L276 IsEmpty]: Start isEmpty. Operand 52192 states and 70826 transitions. [2023-11-21 22:14:05,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-11-21 22:14:05,938 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:14:05,938 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:14:05,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-21 22:14:05,939 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:14:05,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:14:05,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1602279931, now seen corresponding path program 1 times [2023-11-21 22:14:05,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:14:05,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108468762] [2023-11-21 22:14:05,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:14:05,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:14:06,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:06,376 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 52 proven. 23 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-21 22:14:06,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:14:06,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108468762] [2023-11-21 22:14:06,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108468762] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:14:06,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427843590] [2023-11-21 22:14:06,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:14:06,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:14:06,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee24567-de57-4421-802b-6787b120228b/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:14:06,379 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee24567-de57-4421-802b-6787b120228b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:14:06,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee24567-de57-4421-802b-6787b120228b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-21 22:14:06,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:06,571 INFO L262 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-21 22:14:06,575 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:14:07,030 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 53 proven. 23 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-21 22:14:07,030 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:14:08,004 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 49 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-21 22:14:08,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427843590] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:14:08,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:14:08,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9, 10] total 20 [2023-11-21 22:14:08,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654734890] [2023-11-21 22:14:08,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:14:08,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-21 22:14:08,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:14:08,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-21 22:14:08,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2023-11-21 22:14:08,011 INFO L87 Difference]: Start difference. First operand 52192 states and 70826 transitions. Second operand has 20 states, 20 states have (on average 13.95) internal successors, (279), 20 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:14:10,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:14:10,162 INFO L93 Difference]: Finished difference Result 145340 states and 198542 transitions. [2023-11-21 22:14:10,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-21 22:14:10,162 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 13.95) internal successors, (279), 20 states have internal predecessors, (279), 0 states have call successors, (0), 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 115 [2023-11-21 22:14:10,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:14:10,329 INFO L225 Difference]: With dead ends: 145340 [2023-11-21 22:14:10,329 INFO L226 Difference]: Without dead ends: 103284 [2023-11-21 22:14:10,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=645, Invalid=1707, Unknown=0, NotChecked=0, Total=2352 [2023-11-21 22:14:10,540 INFO L413 NwaCegarLoop]: 806 mSDtfsCounter, 1825 mSDsluCounter, 5404 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1825 SdHoareTripleChecker+Valid, 6210 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-21 22:14:10,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1825 Valid, 6210 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]