./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem14_label43.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4b8cf9b-3467-48c8-bb02-b2eb80830bd7/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4b8cf9b-3467-48c8-bb02-b2eb80830bd7/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4b8cf9b-3467-48c8-bb02-b2eb80830bd7/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4b8cf9b-3467-48c8-bb02-b2eb80830bd7/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem14_label43.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4b8cf9b-3467-48c8-bb02-b2eb80830bd7/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4b8cf9b-3467-48c8-bb02-b2eb80830bd7/bin/uautomizer-verify-NlZe1sFDwI --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 1517fa46ec5e3deaa556c4d1abf6414cd1124c01b59fb30f69a647372d6443be --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:59:40,541 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:59:40,612 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4b8cf9b-3467-48c8-bb02-b2eb80830bd7/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-24 21:59:40,617 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:59:40,617 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:59:40,644 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:59:40,644 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:59:40,645 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:59:40,646 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:59:40,646 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:59:40,647 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:59:40,647 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:59:40,648 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:59:40,649 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:59:40,649 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:59:40,650 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:59:40,650 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 21:59:40,651 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:59:40,651 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:59:40,652 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:59:40,652 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:59:40,653 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 21:59:40,653 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:59:40,654 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 21:59:40,654 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:59:40,655 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 21:59:40,655 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:59:40,656 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:59:40,656 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:59:40,656 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:59:40,657 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:59:40,657 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:59:40,658 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:59:40,658 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:59:40,658 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 21:59:40,659 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:59:40,659 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:59:40,659 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:59:40,659 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:59:40,660 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 21:59:40,660 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:59:40,660 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:59:40,660 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_f4b8cf9b-3467-48c8-bb02-b2eb80830bd7/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4b8cf9b-3467-48c8-bb02-b2eb80830bd7/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1517fa46ec5e3deaa556c4d1abf6414cd1124c01b59fb30f69a647372d6443be [2023-11-24 21:59:40,896 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:59:40,929 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:59:40,932 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:59:40,933 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:59:40,934 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:59:40,935 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4b8cf9b-3467-48c8-bb02-b2eb80830bd7/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/eca-rers2012/Problem14_label43.c [2023-11-24 21:59:44,199 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:59:44,603 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:59:44,604 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4b8cf9b-3467-48c8-bb02-b2eb80830bd7/sv-benchmarks/c/eca-rers2012/Problem14_label43.c [2023-11-24 21:59:44,624 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4b8cf9b-3467-48c8-bb02-b2eb80830bd7/bin/uautomizer-verify-NlZe1sFDwI/data/a73ad7a42/b575d1db0f9b4028a669a22ef04a9679/FLAG59a68c030 [2023-11-24 21:59:44,646 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4b8cf9b-3467-48c8-bb02-b2eb80830bd7/bin/uautomizer-verify-NlZe1sFDwI/data/a73ad7a42/b575d1db0f9b4028a669a22ef04a9679 [2023-11-24 21:59:44,652 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:59:44,656 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:59:44,657 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:59:44,657 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:59:44,663 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:59:44,665 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:59:44" (1/1) ... [2023-11-24 21:59:44,666 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55d65170 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:44, skipping insertion in model container [2023-11-24 21:59:44,667 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:59:44" (1/1) ... [2023-11-24 21:59:44,741 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:59:44,960 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_f4b8cf9b-3467-48c8-bb02-b2eb80830bd7/sv-benchmarks/c/eca-rers2012/Problem14_label43.c[1819,1832] [2023-11-24 21:59:45,217 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:59:45,230 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:59:45,250 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_f4b8cf9b-3467-48c8-bb02-b2eb80830bd7/sv-benchmarks/c/eca-rers2012/Problem14_label43.c[1819,1832] [2023-11-24 21:59:45,398 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:59:45,437 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:59:45,438 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:45 WrapperNode [2023-11-24 21:59:45,438 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:59:45,439 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:59:45,440 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:59:45,441 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:59:45,448 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:45" (1/1) ... [2023-11-24 21:59:45,475 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:45" (1/1) ... [2023-11-24 21:59:45,588 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 859 [2023-11-24 21:59:45,589 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:59:45,590 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:59:45,590 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:59:45,591 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:59:45,602 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:45" (1/1) ... [2023-11-24 21:59:45,603 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:45" (1/1) ... [2023-11-24 21:59:45,615 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:45" (1/1) ... [2023-11-24 21:59:45,649 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-24 21:59:45,650 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:45" (1/1) ... [2023-11-24 21:59:45,653 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:45" (1/1) ... [2023-11-24 21:59:45,692 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:45" (1/1) ... [2023-11-24 21:59:45,709 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:45" (1/1) ... [2023-11-24 21:59:45,732 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:45" (1/1) ... [2023-11-24 21:59:45,740 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:45" (1/1) ... [2023-11-24 21:59:45,760 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:59:45,761 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:59:45,761 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:59:45,762 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:59:45,765 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:45" (1/1) ... [2023-11-24 21:59:45,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:59:45,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4b8cf9b-3467-48c8-bb02-b2eb80830bd7/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:59:45,794 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4b8cf9b-3467-48c8-bb02-b2eb80830bd7/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:59:45,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4b8cf9b-3467-48c8-bb02-b2eb80830bd7/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:59:45,825 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:59:45,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:59:45,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:59:45,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:59:45,929 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:59:45,934 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:59:47,573 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:59:47,628 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:59:47,628 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-24 21:59:47,629 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:59:47 BoogieIcfgContainer [2023-11-24 21:59:47,629 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:59:47,632 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:59:47,632 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:59:47,636 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:59:47,636 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:59:44" (1/3) ... [2023-11-24 21:59:47,637 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1db3bb22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:59:47, skipping insertion in model container [2023-11-24 21:59:47,638 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:45" (2/3) ... [2023-11-24 21:59:47,638 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1db3bb22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:59:47, skipping insertion in model container [2023-11-24 21:59:47,638 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:59:47" (3/3) ... [2023-11-24 21:59:47,640 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label43.c [2023-11-24 21:59:47,661 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:59:47,661 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 21:59:47,722 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:59:47,729 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;@1b89f69e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:59:47,730 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 21:59:47,736 INFO L276 IsEmpty]: Start isEmpty. Operand has 183 states, 181 states have (on average 1.988950276243094) internal successors, (360), 182 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:47,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-24 21:59:47,743 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:47,744 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:47,745 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:59:47,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:47,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1288356985, now seen corresponding path program 1 times [2023-11-24 21:59:47,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:47,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187269474] [2023-11-24 21:59:47,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:47,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:47,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:47,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:47,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:47,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187269474] [2023-11-24 21:59:47,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187269474] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:47,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:47,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:59:47,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872961870] [2023-11-24 21:59:47,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:47,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-24 21:59:47,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:47,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-24 21:59:47,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 21:59:47,967 INFO L87 Difference]: Start difference. First operand has 183 states, 181 states have (on average 1.988950276243094) internal successors, (360), 182 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:48,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:48,016 INFO L93 Difference]: Finished difference Result 365 states and 719 transitions. [2023-11-24 21:59:48,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-24 21:59:48,019 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-24 21:59:48,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:48,032 INFO L225 Difference]: With dead ends: 365 [2023-11-24 21:59:48,032 INFO L226 Difference]: Without dead ends: 181 [2023-11-24 21:59:48,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 21:59:48,041 INFO L413 NwaCegarLoop]: 295 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:48,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 295 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:59:48,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-11-24 21:59:48,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2023-11-24 21:59:48,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.6388888888888888) internal successors, (295), 180 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:48,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 295 transitions. [2023-11-24 21:59:48,094 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 295 transitions. Word has length 14 [2023-11-24 21:59:48,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:48,094 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 295 transitions. [2023-11-24 21:59:48,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:48,095 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 295 transitions. [2023-11-24 21:59:48,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-24 21:59:48,096 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:48,096 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:48,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:59:48,097 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:59:48,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:48,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1690991427, now seen corresponding path program 1 times [2023-11-24 21:59:48,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:48,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669851309] [2023-11-24 21:59:48,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:48,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:48,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:48,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:48,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:48,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669851309] [2023-11-24 21:59:48,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669851309] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:48,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:48,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:59:48,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132918479] [2023-11-24 21:59:48,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:48,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:59:48,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:48,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:59:48,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:59:48,250 INFO L87 Difference]: Start difference. First operand 181 states and 295 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:49,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:49,299 INFO L93 Difference]: Finished difference Result 539 states and 882 transitions. [2023-11-24 21:59:49,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:59:49,300 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-24 21:59:49,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:49,304 INFO L225 Difference]: With dead ends: 539 [2023-11-24 21:59:49,304 INFO L226 Difference]: Without dead ends: 359 [2023-11-24 21:59:49,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:59:49,307 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 167 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:49,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 51 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-24 21:59:49,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2023-11-24 21:59:49,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 359. [2023-11-24 21:59:49,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 1.5223463687150838) internal successors, (545), 358 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:49,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 545 transitions. [2023-11-24 21:59:49,377 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 545 transitions. Word has length 14 [2023-11-24 21:59:49,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:49,377 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 545 transitions. [2023-11-24 21:59:49,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:49,378 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 545 transitions. [2023-11-24 21:59:49,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-24 21:59:49,383 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:49,383 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:49,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:59:49,386 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:59:49,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:49,387 INFO L85 PathProgramCache]: Analyzing trace with hash 519342185, now seen corresponding path program 1 times [2023-11-24 21:59:49,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:49,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564139285] [2023-11-24 21:59:49,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:49,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:49,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:49,722 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:49,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:49,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564139285] [2023-11-24 21:59:49,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564139285] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:49,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:49,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:59:49,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134876043] [2023-11-24 21:59:49,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:49,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:59:49,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:49,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:59:49,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:59:49,729 INFO L87 Difference]: Start difference. First operand 359 states and 545 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:50,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:50,663 INFO L93 Difference]: Finished difference Result 1075 states and 1633 transitions. [2023-11-24 21:59:50,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:59:50,664 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 0 states have call successors, (0), 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 89 [2023-11-24 21:59:50,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:50,669 INFO L225 Difference]: With dead ends: 1075 [2023-11-24 21:59:50,669 INFO L226 Difference]: Without dead ends: 717 [2023-11-24 21:59:50,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:59:50,673 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 124 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:50,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 94 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-24 21:59:50,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2023-11-24 21:59:50,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 715. [2023-11-24 21:59:50,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 714 states have (on average 1.3557422969187676) internal successors, (968), 714 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:50,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 968 transitions. [2023-11-24 21:59:50,711 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 968 transitions. Word has length 89 [2023-11-24 21:59:50,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:50,712 INFO L495 AbstractCegarLoop]: Abstraction has 715 states and 968 transitions. [2023-11-24 21:59:50,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:50,713 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 968 transitions. [2023-11-24 21:59:50,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-24 21:59:50,717 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:50,717 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:50,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:59:50,718 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:59:50,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:50,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1630372403, now seen corresponding path program 1 times [2023-11-24 21:59:50,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:50,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409889569] [2023-11-24 21:59:50,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:50,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:50,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:51,125 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:51,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:51,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409889569] [2023-11-24 21:59:51,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409889569] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:51,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:51,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:59:51,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048285758] [2023-11-24 21:59:51,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:51,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:59:51,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:51,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:59:51,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:59:51,129 INFO L87 Difference]: Start difference. First operand 715 states and 968 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:52,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:52,382 INFO L93 Difference]: Finished difference Result 1965 states and 2574 transitions. [2023-11-24 21:59:52,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:59:52,383 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 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 93 [2023-11-24 21:59:52,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:52,391 INFO L225 Difference]: With dead ends: 1965 [2023-11-24 21:59:52,391 INFO L226 Difference]: Without dead ends: 1251 [2023-11-24 21:59:52,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:59:52,394 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 420 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:52,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [420 Valid, 121 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 979 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-24 21:59:52,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2023-11-24 21:59:52,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1249. [2023-11-24 21:59:52,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 1248 states have (on average 1.2379807692307692) internal successors, (1545), 1248 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:52,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 1545 transitions. [2023-11-24 21:59:52,430 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 1545 transitions. Word has length 93 [2023-11-24 21:59:52,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:52,430 INFO L495 AbstractCegarLoop]: Abstraction has 1249 states and 1545 transitions. [2023-11-24 21:59:52,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:52,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 1545 transitions. [2023-11-24 21:59:52,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-11-24 21:59:52,437 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:52,437 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:52,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:59:52,438 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:59:52,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:52,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1269999872, now seen corresponding path program 1 times [2023-11-24 21:59:52,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:52,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353733] [2023-11-24 21:59:52,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:52,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:52,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:52,749 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:52,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:52,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353733] [2023-11-24 21:59:52,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353733] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:52,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:52,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:59:52,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978362222] [2023-11-24 21:59:52,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:52,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:59:52,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:52,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:59:52,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:59:52,753 INFO L87 Difference]: Start difference. First operand 1249 states and 1545 transitions. Second operand has 4 states, 4 states have (on average 43.25) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:53,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:53,711 INFO L93 Difference]: Finished difference Result 2706 states and 3358 transitions. [2023-11-24 21:59:53,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:59:53,712 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.25) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 173 [2023-11-24 21:59:53,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:53,722 INFO L225 Difference]: With dead ends: 2706 [2023-11-24 21:59:53,723 INFO L226 Difference]: Without dead ends: 1607 [2023-11-24 21:59:53,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:59:53,727 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 104 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:53,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 119 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-24 21:59:53,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2023-11-24 21:59:53,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 1605. [2023-11-24 21:59:53,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1605 states, 1604 states have (on average 1.124064837905237) internal successors, (1803), 1604 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:53,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 1803 transitions. [2023-11-24 21:59:53,778 INFO L78 Accepts]: Start accepts. Automaton has 1605 states and 1803 transitions. Word has length 173 [2023-11-24 21:59:53,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:53,779 INFO L495 AbstractCegarLoop]: Abstraction has 1605 states and 1803 transitions. [2023-11-24 21:59:53,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.25) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:53,780 INFO L276 IsEmpty]: Start isEmpty. Operand 1605 states and 1803 transitions. [2023-11-24 21:59:53,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2023-11-24 21:59:53,788 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:53,789 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:53,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:59:53,789 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:59:53,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:53,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1916502854, now seen corresponding path program 1 times [2023-11-24 21:59:53,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:53,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335765966] [2023-11-24 21:59:53,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:53,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:53,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:54,615 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 86 proven. 130 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-11-24 21:59:54,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:54,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335765966] [2023-11-24 21:59:54,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335765966] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:59:54,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902216951] [2023-11-24 21:59:54,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:54,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:59:54,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4b8cf9b-3467-48c8-bb02-b2eb80830bd7/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:59:54,621 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4b8cf9b-3467-48c8-bb02-b2eb80830bd7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:59:54,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4b8cf9b-3467-48c8-bb02-b2eb80830bd7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:59:54,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:54,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 21:59:54,855 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:59:55,375 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-11-24 21:59:55,376 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:59:55,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902216951] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:55,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:59:55,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-24 21:59:55,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761064488] [2023-11-24 21:59:55,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:55,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:59:55,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:55,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:59:55,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:59:55,387 INFO L87 Difference]: Start difference. First operand 1605 states and 1803 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 2 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:56,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:56,131 INFO L93 Difference]: Finished difference Result 3387 states and 3906 transitions. [2023-11-24 21:59:56,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:59:56,139 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 2 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 300 [2023-11-24 21:59:56,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:56,151 INFO L225 Difference]: With dead ends: 3387 [2023-11-24 21:59:56,152 INFO L226 Difference]: Without dead ends: 1961 [2023-11-24 21:59:56,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:59:56,161 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 82 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:56,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 45 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 21:59:56,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2023-11-24 21:59:56,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1961. [2023-11-24 21:59:56,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1961 states, 1960 states have (on average 1.1224489795918366) internal successors, (2200), 1960 states have internal predecessors, (2200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:56,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 2200 transitions. [2023-11-24 21:59:56,216 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 2200 transitions. Word has length 300 [2023-11-24 21:59:56,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:56,218 INFO L495 AbstractCegarLoop]: Abstraction has 1961 states and 2200 transitions. [2023-11-24 21:59:56,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 2 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:56,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 2200 transitions. [2023-11-24 21:59:56,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2023-11-24 21:59:56,223 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:56,223 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:56,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4b8cf9b-3467-48c8-bb02-b2eb80830bd7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 21:59:56,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4b8cf9b-3467-48c8-bb02-b2eb80830bd7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:59:56,431 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:59:56,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:56,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1888601744, now seen corresponding path program 1 times [2023-11-24 21:59:56,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:56,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634423671] [2023-11-24 21:59:56,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:56,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:56,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:56,900 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 195 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2023-11-24 21:59:56,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:56,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634423671] [2023-11-24 21:59:56,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634423671] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:56,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:56,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:59:56,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902704609] [2023-11-24 21:59:56,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:56,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:59:56,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:56,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:59:56,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:59:56,903 INFO L87 Difference]: Start difference. First operand 1961 states and 2200 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:57,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:57,645 INFO L93 Difference]: Finished difference Result 4099 states and 4647 transitions. [2023-11-24 21:59:57,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:59:57,645 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 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 304 [2023-11-24 21:59:57,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:57,665 INFO L225 Difference]: With dead ends: 4099 [2023-11-24 21:59:57,665 INFO L226 Difference]: Without dead ends: 2317 [2023-11-24 21:59:57,668 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 [2023-11-24 21:59:57,669 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 100 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:57,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 75 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 21:59:57,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2317 states. [2023-11-24 21:59:57,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2317 to 2317. [2023-11-24 21:59:57,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2317 states, 2316 states have (on average 1.1204663212435233) internal successors, (2595), 2316 states have internal predecessors, (2595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:57,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 2595 transitions. [2023-11-24 21:59:57,729 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 2595 transitions. Word has length 304 [2023-11-24 21:59:57,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:57,730 INFO L495 AbstractCegarLoop]: Abstraction has 2317 states and 2595 transitions. [2023-11-24 21:59:57,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:57,731 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 2595 transitions. [2023-11-24 21:59:57,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2023-11-24 21:59:57,736 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:57,736 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2023-11-24 21:59:57,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 21:59:57,739 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:59:57,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:57,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1922855276, now seen corresponding path program 1 times [2023-11-24 21:59:57,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:57,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981356763] [2023-11-24 21:59:57,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:57,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:57,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:58,260 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2023-11-24 21:59:58,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:58,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981356763] [2023-11-24 21:59:58,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981356763] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:59:58,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112261809] [2023-11-24 21:59:58,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:58,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:59:58,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4b8cf9b-3467-48c8-bb02-b2eb80830bd7/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:59:58,263 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4b8cf9b-3467-48c8-bb02-b2eb80830bd7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:59:58,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4b8cf9b-3467-48c8-bb02-b2eb80830bd7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:59:58,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:58,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 21:59:58,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:59:58,964 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2023-11-24 21:59:58,964 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:59:58,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112261809] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:58,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:59:58,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2023-11-24 21:59:58,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255655941] [2023-11-24 21:59:58,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:58,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:59:58,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:58,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:59:58,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:59:58,969 INFO L87 Difference]: Start difference. First operand 2317 states and 2595 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:59,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:59,687 INFO L93 Difference]: Finished difference Result 2853 states and 3201 transitions. [2023-11-24 21:59:59,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:59:59,688 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 0 states have call successors, (0), 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 331 [2023-11-24 21:59:59,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:59,705 INFO L225 Difference]: With dead ends: 2853 [2023-11-24 21:59:59,705 INFO L226 Difference]: Without dead ends: 2851 [2023-11-24 21:59:59,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:59:59,708 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 90 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:59,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 22 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 21:59:59,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2023-11-24 21:59:59,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2495. [2023-11-24 21:59:59,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2495 states, 2494 states have (on average 1.1255012028869287) internal successors, (2807), 2494 states have internal predecessors, (2807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:59,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2495 states to 2495 states and 2807 transitions. [2023-11-24 21:59:59,784 INFO L78 Accepts]: Start accepts. Automaton has 2495 states and 2807 transitions. Word has length 331 [2023-11-24 21:59:59,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:59,785 INFO L495 AbstractCegarLoop]: Abstraction has 2495 states and 2807 transitions. [2023-11-24 21:59:59,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:59,785 INFO L276 IsEmpty]: Start isEmpty. Operand 2495 states and 2807 transitions. [2023-11-24 21:59:59,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2023-11-24 21:59:59,797 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:59,798 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:59,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4b8cf9b-3467-48c8-bb02-b2eb80830bd7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 22:00:00,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4b8cf9b-3467-48c8-bb02-b2eb80830bd7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:00:00,005 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:00:00,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:00:00,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1174197411, now seen corresponding path program 1 times [2023-11-24 22:00:00,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:00:00,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413865591] [2023-11-24 22:00:00,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:00:00,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:00:00,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:00,511 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 287 proven. 0 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2023-11-24 22:00:00,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:00:00,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413865591] [2023-11-24 22:00:00,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413865591] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:00:00,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:00:00,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:00:00,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690362186] [2023-11-24 22:00:00,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:00:00,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:00:00,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:00:00,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:00:00,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:00:00,515 INFO L87 Difference]: Start difference. First operand 2495 states and 2807 transitions. Second operand has 4 states, 4 states have (on average 50.5) internal successors, (202), 3 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) [2023-11-24 22:00:01,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:00:01,296 INFO L93 Difference]: Finished difference Result 5047 states and 5688 transitions. [2023-11-24 22:00:01,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 22:00:01,297 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 50.5) internal successors, (202), 3 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 384 [2023-11-24 22:00:01,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:00:01,312 INFO L225 Difference]: With dead ends: 5047 [2023-11-24 22:00:01,313 INFO L226 Difference]: Without dead ends: 2673 [2023-11-24 22:00:01,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:00:01,318 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 124 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 22:00:01,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 14 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 22:00:01,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2673 states. [2023-11-24 22:00:01,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2673 to 2495. [2023-11-24 22:00:01,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2495 states, 2494 states have (on average 1.0850040096230955) internal successors, (2706), 2494 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:01,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2495 states to 2495 states and 2706 transitions. [2023-11-24 22:00:01,382 INFO L78 Accepts]: Start accepts. Automaton has 2495 states and 2706 transitions. Word has length 384 [2023-11-24 22:00:01,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:00:01,383 INFO L495 AbstractCegarLoop]: Abstraction has 2495 states and 2706 transitions. [2023-11-24 22:00:01,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.5) internal successors, (202), 3 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) [2023-11-24 22:00:01,383 INFO L276 IsEmpty]: Start isEmpty. Operand 2495 states and 2706 transitions. [2023-11-24 22:00:01,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2023-11-24 22:00:01,391 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:00:01,391 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2023-11-24 22:00:01,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 22:00:01,392 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:00:01,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:00:01,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1933502332, now seen corresponding path program 2 times [2023-11-24 22:00:01,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:00:01,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842068655] [2023-11-24 22:00:01,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:00:01,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:00:01,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:02,368 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 301 proven. 195 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-11-24 22:00:02,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:00:02,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842068655] [2023-11-24 22:00:02,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842068655] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:00:02,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471824974] [2023-11-24 22:00:02,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 22:00:02,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:00:02,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4b8cf9b-3467-48c8-bb02-b2eb80830bd7/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:00:02,371 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4b8cf9b-3467-48c8-bb02-b2eb80830bd7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:00:02,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4b8cf9b-3467-48c8-bb02-b2eb80830bd7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 22:00:02,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 22:00:02,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 22:00:02,602 INFO L262 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 22:00:02,608 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:00:02,655 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2023-11-24 22:00:02,655 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:00:02,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471824974] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:00:02,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 22:00:02,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2023-11-24 22:00:02,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138473638] [2023-11-24 22:00:02,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:00:02,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:00:02,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:00:02,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:00:02,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-24 22:00:02,659 INFO L87 Difference]: Start difference. First operand 2495 states and 2706 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:03,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:00:03,275 INFO L93 Difference]: Finished difference Result 5167 states and 5620 transitions. [2023-11-24 22:00:03,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:00:03,276 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 410 [2023-11-24 22:00:03,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:00:03,290 INFO L225 Difference]: With dead ends: 5167 [2023-11-24 22:00:03,290 INFO L226 Difference]: Without dead ends: 2495 [2023-11-24 22:00:03,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 409 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-24 22:00:03,294 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 166 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 22:00:03,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 244 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 22:00:03,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2495 states. [2023-11-24 22:00:03,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2495 to 2139. [2023-11-24 22:00:03,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2139 states, 2138 states have (on average 1.0865294667913938) internal successors, (2323), 2138 states have internal predecessors, (2323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:03,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2139 states to 2139 states and 2323 transitions. [2023-11-24 22:00:03,353 INFO L78 Accepts]: Start accepts. Automaton has 2139 states and 2323 transitions. Word has length 410 [2023-11-24 22:00:03,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:00:03,354 INFO L495 AbstractCegarLoop]: Abstraction has 2139 states and 2323 transitions. [2023-11-24 22:00:03,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:03,355 INFO L276 IsEmpty]: Start isEmpty. Operand 2139 states and 2323 transitions. [2023-11-24 22:00:03,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2023-11-24 22:00:03,367 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:00:03,368 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:00:03,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4b8cf9b-3467-48c8-bb02-b2eb80830bd7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-24 22:00:03,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4b8cf9b-3467-48c8-bb02-b2eb80830bd7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-24 22:00:03,574 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:00:03,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:00:03,575 INFO L85 PathProgramCache]: Analyzing trace with hash 2026721733, now seen corresponding path program 1 times [2023-11-24 22:00:03,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:00:03,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154002097] [2023-11-24 22:00:03,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:00:03,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:00:03,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:04,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1021 backedges. 683 proven. 11 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2023-11-24 22:00:04,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:00:04,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154002097] [2023-11-24 22:00:04,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154002097] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:00:04,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62046650] [2023-11-24 22:00:04,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:00:04,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:00:04,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4b8cf9b-3467-48c8-bb02-b2eb80830bd7/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:00:04,543 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4b8cf9b-3467-48c8-bb02-b2eb80830bd7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:00:04,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4b8cf9b-3467-48c8-bb02-b2eb80830bd7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 22:00:04,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:04,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 22:00:04,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:00:06,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1021 backedges. 378 proven. 0 refuted. 0 times theorem prover too weak. 643 trivial. 0 not checked. [2023-11-24 22:00:06,336 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:00:06,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62046650] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:00:06,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 22:00:06,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-24 22:00:06,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090467779] [2023-11-24 22:00:06,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:00:06,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:00:06,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:00:06,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:00:06,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-24 22:00:06,339 INFO L87 Difference]: Start difference. First operand 2139 states and 2323 transitions. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:06,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:00:06,959 INFO L93 Difference]: Finished difference Result 4099 states and 4469 transitions. [2023-11-24 22:00:06,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:00:06,960 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 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 521 [2023-11-24 22:00:06,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:00:06,971 INFO L225 Difference]: With dead ends: 4099 [2023-11-24 22:00:06,971 INFO L226 Difference]: Without dead ends: 2139 [2023-11-24 22:00:06,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 520 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-24 22:00:06,975 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 80 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 22:00:06,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 44 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 22:00:06,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2139 states. [2023-11-24 22:00:07,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2139 to 2139. [2023-11-24 22:00:07,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2139 states, 2138 states have (on average 1.0537885874649204) internal successors, (2253), 2138 states have internal predecessors, (2253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:07,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2139 states to 2139 states and 2253 transitions. [2023-11-24 22:00:07,025 INFO L78 Accepts]: Start accepts. Automaton has 2139 states and 2253 transitions. Word has length 521 [2023-11-24 22:00:07,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:00:07,026 INFO L495 AbstractCegarLoop]: Abstraction has 2139 states and 2253 transitions. [2023-11-24 22:00:07,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:07,027 INFO L276 IsEmpty]: Start isEmpty. Operand 2139 states and 2253 transitions. [2023-11-24 22:00:07,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 589 [2023-11-24 22:00:07,042 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:00:07,043 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:00:07,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4b8cf9b-3467-48c8-bb02-b2eb80830bd7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 22:00:07,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4b8cf9b-3467-48c8-bb02-b2eb80830bd7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-24 22:00:07,252 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:00:07,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:00:07,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1589007812, now seen corresponding path program 1 times [2023-11-24 22:00:07,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:00:07,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866701644] [2023-11-24 22:00:07,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:00:07,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:00:07,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:07,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1021 backedges. 694 proven. 0 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2023-11-24 22:00:07,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:00:07,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866701644] [2023-11-24 22:00:07,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866701644] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:00:07,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:00:07,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:00:07,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558094199] [2023-11-24 22:00:07,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:00:07,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:00:07,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:00:07,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:00:07,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:00:07,769 INFO L87 Difference]: Start difference. First operand 2139 states and 2253 transitions. Second operand has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:08,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:00:08,377 INFO L93 Difference]: Finished difference Result 4277 states and 4548 transitions. [2023-11-24 22:00:08,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:00:08,378 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 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 588 [2023-11-24 22:00:08,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:00:08,391 INFO L225 Difference]: With dead ends: 4277 [2023-11-24 22:00:08,391 INFO L226 Difference]: Without dead ends: 2495 [2023-11-24 22:00:08,393 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 [2023-11-24 22:00:08,394 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 5 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 22:00:08,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 40 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 22:00:08,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2495 states. [2023-11-24 22:00:08,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2495 to 2317. [2023-11-24 22:00:08,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2317 states, 2316 states have (on average 1.0535405872193437) internal successors, (2440), 2316 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:08,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 2440 transitions. [2023-11-24 22:00:08,449 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 2440 transitions. Word has length 588 [2023-11-24 22:00:08,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:00:08,450 INFO L495 AbstractCegarLoop]: Abstraction has 2317 states and 2440 transitions. [2023-11-24 22:00:08,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:08,451 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 2440 transitions. [2023-11-24 22:00:08,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 596 [2023-11-24 22:00:08,456 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:00:08,458 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:00:08,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-24 22:00:08,458 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:00:08,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:00:08,459 INFO L85 PathProgramCache]: Analyzing trace with hash 290358771, now seen corresponding path program 1 times [2023-11-24 22:00:08,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:00:08,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172999734] [2023-11-24 22:00:08,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:00:08,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:00:08,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:08,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 701 proven. 0 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2023-11-24 22:00:08,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:00:08,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172999734] [2023-11-24 22:00:08,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172999734] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:00:08,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:00:08,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:00:08,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133076771] [2023-11-24 22:00:08,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:00:08,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:00:08,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:00:08,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:00:08,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:00:08,975 INFO L87 Difference]: Start difference. First operand 2317 states and 2440 transitions. Second operand has 3 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:09,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:00:09,513 INFO L93 Difference]: Finished difference Result 4989 states and 5288 transitions. [2023-11-24 22:00:09,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:00:09,514 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 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 595 [2023-11-24 22:00:09,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:00:09,529 INFO L225 Difference]: With dead ends: 4989 [2023-11-24 22:00:09,530 INFO L226 Difference]: Without dead ends: 3029 [2023-11-24 22:00:09,532 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 [2023-11-24 22:00:09,533 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 7 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 22:00:09,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 36 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 22:00:09,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3029 states. [2023-11-24 22:00:09,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3029 to 3029. [2023-11-24 22:00:09,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3029 states, 3028 states have (on average 1.0505284015852048) internal successors, (3181), 3028 states have internal predecessors, (3181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:09,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3029 states to 3029 states and 3181 transitions. [2023-11-24 22:00:09,600 INFO L78 Accepts]: Start accepts. Automaton has 3029 states and 3181 transitions. Word has length 595 [2023-11-24 22:00:09,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:00:09,601 INFO L495 AbstractCegarLoop]: Abstraction has 3029 states and 3181 transitions. [2023-11-24 22:00:09,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:09,602 INFO L276 IsEmpty]: Start isEmpty. Operand 3029 states and 3181 transitions. [2023-11-24 22:00:09,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 718 [2023-11-24 22:00:09,608 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:00:09,609 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:00:09,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-24 22:00:09,610 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:00:09,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:00:09,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1494060383, now seen corresponding path program 1 times [2023-11-24 22:00:09,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:00:09,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324490761] [2023-11-24 22:00:09,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:00:09,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:00:09,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:10,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1561 backedges. 1139 proven. 0 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2023-11-24 22:00:10,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:00:10,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324490761] [2023-11-24 22:00:10,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324490761] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:00:10,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:00:10,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:00:10,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794452267] [2023-11-24 22:00:10,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:00:10,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:00:10,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:00:10,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:00:10,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:00:10,597 INFO L87 Difference]: Start difference. First operand 3029 states and 3181 transitions. Second operand has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:11,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:00:11,145 INFO L93 Difference]: Finished difference Result 5879 states and 6182 transitions. [2023-11-24 22:00:11,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:00:11,146 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 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 717 [2023-11-24 22:00:11,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:00:11,165 INFO L225 Difference]: With dead ends: 5879 [2023-11-24 22:00:11,165 INFO L226 Difference]: Without dead ends: 3029 [2023-11-24 22:00:11,169 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 [2023-11-24 22:00:11,170 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 51 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 22:00:11,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 219 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 22:00:11,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3029 states. [2023-11-24 22:00:11,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3029 to 2851. [2023-11-24 22:00:11,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2851 states, 2850 states have (on average 1.0498245614035089) internal successors, (2992), 2850 states have internal predecessors, (2992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:11,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2851 states to 2851 states and 2992 transitions. [2023-11-24 22:00:11,251 INFO L78 Accepts]: Start accepts. Automaton has 2851 states and 2992 transitions. Word has length 717 [2023-11-24 22:00:11,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:00:11,253 INFO L495 AbstractCegarLoop]: Abstraction has 2851 states and 2992 transitions. [2023-11-24 22:00:11,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:11,254 INFO L276 IsEmpty]: Start isEmpty. Operand 2851 states and 2992 transitions. [2023-11-24 22:00:11,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 725 [2023-11-24 22:00:11,261 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:00:11,261 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:00:11,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-24 22:00:11,262 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:00:11,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:00:11,276 INFO L85 PathProgramCache]: Analyzing trace with hash 2117030672, now seen corresponding path program 1 times [2023-11-24 22:00:11,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:00:11,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556690905] [2023-11-24 22:00:11,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:00:11,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:00:11,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:12,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1575 backedges. 1153 proven. 0 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2023-11-24 22:00:12,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:00:12,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556690905] [2023-11-24 22:00:12,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556690905] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:00:12,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:00:12,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:00:12,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273337792] [2023-11-24 22:00:12,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:00:12,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:00:12,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:00:12,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:00:12,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:00:12,117 INFO L87 Difference]: Start difference. First operand 2851 states and 2992 transitions. Second operand has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:12,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:00:12,736 INFO L93 Difference]: Finished difference Result 6413 states and 6775 transitions. [2023-11-24 22:00:12,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:00:12,737 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 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 724 [2023-11-24 22:00:12,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:00:12,756 INFO L225 Difference]: With dead ends: 6413 [2023-11-24 22:00:12,756 INFO L226 Difference]: Without dead ends: 3741 [2023-11-24 22:00:12,759 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 [2023-11-24 22:00:12,760 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 50 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 22:00:12,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 214 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 22:00:12,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3741 states. [2023-11-24 22:00:12,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3741 to 3563. [2023-11-24 22:00:12,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3563 states, 3562 states have (on average 1.049129702414374) internal successors, (3737), 3562 states have internal predecessors, (3737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:12,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3563 states to 3563 states and 3737 transitions. [2023-11-24 22:00:12,834 INFO L78 Accepts]: Start accepts. Automaton has 3563 states and 3737 transitions. Word has length 724 [2023-11-24 22:00:12,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:00:12,836 INFO L495 AbstractCegarLoop]: Abstraction has 3563 states and 3737 transitions. [2023-11-24 22:00:12,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:12,836 INFO L276 IsEmpty]: Start isEmpty. Operand 3563 states and 3737 transitions. [2023-11-24 22:00:12,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 751 [2023-11-24 22:00:12,844 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:00:12,844 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-24 22:00:12,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-24 22:00:12,845 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:00:12,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:00:12,846 INFO L85 PathProgramCache]: Analyzing trace with hash 598001551, now seen corresponding path program 1 times [2023-11-24 22:00:12,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:00:12,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125360259] [2023-11-24 22:00:12,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:00:12,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:00:12,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:13,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1601 backedges. 1119 proven. 155 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2023-11-24 22:00:13,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:00:13,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125360259] [2023-11-24 22:00:13,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125360259] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:00:13,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107725748] [2023-11-24 22:00:13,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:00:13,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:00:13,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4b8cf9b-3467-48c8-bb02-b2eb80830bd7/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:00:13,584 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4b8cf9b-3467-48c8-bb02-b2eb80830bd7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:00:13,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4b8cf9b-3467-48c8-bb02-b2eb80830bd7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 22:00:13,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:13,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 933 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 22:00:13,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:00:14,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1601 backedges. 1119 proven. 155 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2023-11-24 22:00:14,319 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:00:14,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1601 backedges. 1119 proven. 155 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2023-11-24 22:00:14,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107725748] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:00:14,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 22:00:14,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2023-11-24 22:00:14,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352411553] [2023-11-24 22:00:14,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 22:00:14,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 22:00:14,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:00:14,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 22:00:14,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-24 22:00:14,810 INFO L87 Difference]: Start difference. First operand 3563 states and 3737 transitions. Second operand has 6 states, 6 states have (on average 143.5) internal successors, (861), 6 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:16,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:00:16,088 INFO L93 Difference]: Finished difference Result 7659 states and 8053 transitions. [2023-11-24 22:00:16,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 22:00:16,089 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 143.5) internal successors, (861), 6 states have internal predecessors, (861), 0 states have call successors, (0), 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 750 [2023-11-24 22:00:16,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:00:16,100 INFO L225 Difference]: With dead ends: 7659 [2023-11-24 22:00:16,101 INFO L226 Difference]: Without dead ends: 4275 [2023-11-24 22:00:16,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1502 GetRequests, 1498 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-24 22:00:16,106 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 36 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 1178 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-24 22:00:16,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 45 Invalid, 1210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1178 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-24 22:00:16,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4275 states. [2023-11-24 22:00:16,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4275 to 4097. [2023-11-24 22:00:16,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4097 states, 4096 states have (on average 1.049072265625) internal successors, (4297), 4096 states have internal predecessors, (4297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:16,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4097 states to 4097 states and 4297 transitions. [2023-11-24 22:00:16,252 INFO L78 Accepts]: Start accepts. Automaton has 4097 states and 4297 transitions. Word has length 750 [2023-11-24 22:00:16,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:00:16,253 INFO L495 AbstractCegarLoop]: Abstraction has 4097 states and 4297 transitions. [2023-11-24 22:00:16,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 143.5) internal successors, (861), 6 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:16,254 INFO L276 IsEmpty]: Start isEmpty. Operand 4097 states and 4297 transitions. [2023-11-24 22:00:16,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 802 [2023-11-24 22:00:16,263 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:00:16,264 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:00:16,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4b8cf9b-3467-48c8-bb02-b2eb80830bd7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 22:00:16,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4b8cf9b-3467-48c8-bb02-b2eb80830bd7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-24 22:00:16,472 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:00:16,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:00:16,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1795294929, now seen corresponding path program 1 times [2023-11-24 22:00:16,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:00:16,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780725718] [2023-11-24 22:00:16,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:00:16,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:00:16,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:17,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2049 backedges. 1550 proven. 0 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2023-11-24 22:00:17,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:00:17,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780725718] [2023-11-24 22:00:17,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780725718] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:00:17,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:00:17,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:00:17,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569348198] [2023-11-24 22:00:17,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:00:17,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:00:17,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:00:17,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:00:17,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:00:17,434 INFO L87 Difference]: Start difference. First operand 4097 states and 4297 transitions. Second operand has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:18,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:00:18,042 INFO L93 Difference]: Finished difference Result 8015 states and 8414 transitions. [2023-11-24 22:00:18,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:00:18,044 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 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 801 [2023-11-24 22:00:18,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:00:18,053 INFO L225 Difference]: With dead ends: 8015 [2023-11-24 22:00:18,054 INFO L226 Difference]: Without dead ends: 4097 [2023-11-24 22:00:18,060 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 [2023-11-24 22:00:18,061 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 50 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 22:00:18,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 218 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 22:00:18,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4097 states. [2023-11-24 22:00:18,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4097 to 3741. [2023-11-24 22:00:18,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3741 states, 3740 states have (on average 1.0475935828877005) internal successors, (3918), 3740 states have internal predecessors, (3918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:18,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3741 states to 3741 states and 3918 transitions. [2023-11-24 22:00:18,149 INFO L78 Accepts]: Start accepts. Automaton has 3741 states and 3918 transitions. Word has length 801 [2023-11-24 22:00:18,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:00:18,150 INFO L495 AbstractCegarLoop]: Abstraction has 3741 states and 3918 transitions. [2023-11-24 22:00:18,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:18,151 INFO L276 IsEmpty]: Start isEmpty. Operand 3741 states and 3918 transitions. [2023-11-24 22:00:18,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 823 [2023-11-24 22:00:18,161 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:00:18,161 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-24 22:00:18,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-24 22:00:18,162 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:00:18,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:00:18,163 INFO L85 PathProgramCache]: Analyzing trace with hash -116333648, now seen corresponding path program 1 times [2023-11-24 22:00:18,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:00:18,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104832103] [2023-11-24 22:00:18,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:00:18,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:00:18,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:18,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2045 backedges. 1300 proven. 0 refuted. 0 times theorem prover too weak. 745 trivial. 0 not checked. [2023-11-24 22:00:18,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:00:18,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104832103] [2023-11-24 22:00:18,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104832103] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:00:18,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:00:18,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:00:18,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389807435] [2023-11-24 22:00:18,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:00:18,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:00:18,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:00:18,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:00:18,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:00:18,859 INFO L87 Difference]: Start difference. First operand 3741 states and 3918 transitions. Second operand has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:19,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:00:19,478 INFO L93 Difference]: Finished difference Result 8371 states and 8821 transitions. [2023-11-24 22:00:19,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:00:19,479 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 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 822 [2023-11-24 22:00:19,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:00:19,487 INFO L225 Difference]: With dead ends: 8371 [2023-11-24 22:00:19,488 INFO L226 Difference]: Without dead ends: 4809 [2023-11-24 22:00:19,493 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 [2023-11-24 22:00:19,494 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 107 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 22:00:19,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 23 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 22:00:19,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4809 states. [2023-11-24 22:00:19,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4809 to 4631. [2023-11-24 22:00:19,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4631 states, 4630 states have (on average 1.0501079913606912) internal successors, (4862), 4630 states have internal predecessors, (4862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:19,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4631 states to 4631 states and 4862 transitions. [2023-11-24 22:00:19,624 INFO L78 Accepts]: Start accepts. Automaton has 4631 states and 4862 transitions. Word has length 822 [2023-11-24 22:00:19,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:00:19,625 INFO L495 AbstractCegarLoop]: Abstraction has 4631 states and 4862 transitions. [2023-11-24 22:00:19,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:19,626 INFO L276 IsEmpty]: Start isEmpty. Operand 4631 states and 4862 transitions. [2023-11-24 22:00:19,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 841 [2023-11-24 22:00:19,636 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:00:19,636 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:00:19,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-24 22:00:19,637 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:00:19,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:00:19,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1542841789, now seen corresponding path program 1 times [2023-11-24 22:00:19,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:00:19,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640565620] [2023-11-24 22:00:19,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:00:19,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:00:19,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:20,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2063 backedges. 1391 proven. 93 refuted. 0 times theorem prover too weak. 579 trivial. 0 not checked. [2023-11-24 22:00:20,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:00:20,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640565620] [2023-11-24 22:00:20,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640565620] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:00:20,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610711659] [2023-11-24 22:00:20,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:00:20,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:00:20,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4b8cf9b-3467-48c8-bb02-b2eb80830bd7/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:00:20,759 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4b8cf9b-3467-48c8-bb02-b2eb80830bd7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:00:20,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4b8cf9b-3467-48c8-bb02-b2eb80830bd7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 22:00:21,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:21,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 1043 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 22:00:21,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:00:21,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2063 backedges. 1484 proven. 0 refuted. 0 times theorem prover too weak. 579 trivial. 0 not checked. [2023-11-24 22:00:21,891 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:00:21,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610711659] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:00:21,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 22:00:21,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-11-24 22:00:21,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514649604] [2023-11-24 22:00:21,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:00:21,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:00:21,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:00:21,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:00:21,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 22:00:21,899 INFO L87 Difference]: Start difference. First operand 4631 states and 4862 transitions. Second operand has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:22,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:00:22,454 INFO L93 Difference]: Finished difference Result 9261 states and 9726 transitions. [2023-11-24 22:00:22,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:00:22,455 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 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 840 [2023-11-24 22:00:22,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:00:22,465 INFO L225 Difference]: With dead ends: 9261 [2023-11-24 22:00:22,465 INFO L226 Difference]: Without dead ends: 4809 [2023-11-24 22:00:22,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 843 GetRequests, 839 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 22:00:22,470 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 22:00:22,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 41 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 22:00:22,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4809 states. [2023-11-24 22:00:22,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4809 to 4631. [2023-11-24 22:00:22,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4631 states, 4630 states have (on average 1.0501079913606912) internal successors, (4862), 4630 states have internal predecessors, (4862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:22,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4631 states to 4631 states and 4862 transitions. [2023-11-24 22:00:22,571 INFO L78 Accepts]: Start accepts. Automaton has 4631 states and 4862 transitions. Word has length 840 [2023-11-24 22:00:22,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:00:22,572 INFO L495 AbstractCegarLoop]: Abstraction has 4631 states and 4862 transitions. [2023-11-24 22:00:22,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:22,573 INFO L276 IsEmpty]: Start isEmpty. Operand 4631 states and 4862 transitions. [2023-11-24 22:00:22,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 909 [2023-11-24 22:00:22,584 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:00:22,585 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-24 22:00:22,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4b8cf9b-3467-48c8-bb02-b2eb80830bd7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-24 22:00:22,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4b8cf9b-3467-48c8-bb02-b2eb80830bd7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:00:22,795 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:00:22,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:00:22,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1565355001, now seen corresponding path program 1 times [2023-11-24 22:00:22,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:00:22,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106418597] [2023-11-24 22:00:22,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:00:22,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:00:22,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:24,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2332 backedges. 1587 proven. 0 refuted. 0 times theorem prover too weak. 745 trivial. 0 not checked. [2023-11-24 22:00:24,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:00:24,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106418597] [2023-11-24 22:00:24,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106418597] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:00:24,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:00:24,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:00:24,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793487521] [2023-11-24 22:00:24,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:00:24,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:00:24,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:00:24,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:00:24,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:00:24,028 INFO L87 Difference]: Start difference. First operand 4631 states and 4862 transitions. Second operand has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:24,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:00:24,586 INFO L93 Difference]: Finished difference Result 9083 states and 9546 transitions. [2023-11-24 22:00:24,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:00:24,587 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 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 908 [2023-11-24 22:00:24,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:00:24,597 INFO L225 Difference]: With dead ends: 9083 [2023-11-24 22:00:24,598 INFO L226 Difference]: Without dead ends: 4631 [2023-11-24 22:00:24,604 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 [2023-11-24 22:00:24,605 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 21 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 22:00:24,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 211 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 22:00:24,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4631 states. [2023-11-24 22:00:24,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4631 to 4631. [2023-11-24 22:00:24,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4631 states, 4630 states have (on average 1.0434125269978403) internal successors, (4831), 4630 states have internal predecessors, (4831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:24,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4631 states to 4631 states and 4831 transitions. [2023-11-24 22:00:24,715 INFO L78 Accepts]: Start accepts. Automaton has 4631 states and 4831 transitions. Word has length 908 [2023-11-24 22:00:24,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:00:24,716 INFO L495 AbstractCegarLoop]: Abstraction has 4631 states and 4831 transitions. [2023-11-24 22:00:24,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:24,717 INFO L276 IsEmpty]: Start isEmpty. Operand 4631 states and 4831 transitions. [2023-11-24 22:00:24,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 918 [2023-11-24 22:00:24,730 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:00:24,731 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-24 22:00:24,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-24 22:00:24,731 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:00:24,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:00:24,732 INFO L85 PathProgramCache]: Analyzing trace with hash 841914244, now seen corresponding path program 1 times [2023-11-24 22:00:24,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:00:24,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30346878] [2023-11-24 22:00:24,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:00:24,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:00:24,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat