./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem12_label04.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_23960e9f-e5c2-4cd3-925f-2811e5332cb7/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23960e9f-e5c2-4cd3-925f-2811e5332cb7/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_23960e9f-e5c2-4cd3-925f-2811e5332cb7/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23960e9f-e5c2-4cd3-925f-2811e5332cb7/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem12_label04.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23960e9f-e5c2-4cd3-925f-2811e5332cb7/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_23960e9f-e5c2-4cd3-925f-2811e5332cb7/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 33de5d7f20015c0808aeb1de8a96a544518a9ee4634466bd76c0c961f4a657cf --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 22:05:55,804 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 22:05:55,871 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23960e9f-e5c2-4cd3-925f-2811e5332cb7/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-24 22:05:55,876 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 22:05:55,877 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 22:05:55,902 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 22:05:55,903 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 22:05:55,903 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 22:05:55,904 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 22:05:55,905 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 22:05:55,906 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 22:05:55,906 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 22:05:55,907 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 22:05:55,908 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 22:05:55,908 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 22:05:55,909 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 22:05:55,909 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 22:05:55,910 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 22:05:55,910 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 22:05:55,911 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 22:05:55,911 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 22:05:55,912 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 22:05:55,912 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 22:05:55,913 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 22:05:55,913 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 22:05:55,914 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 22:05:55,914 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 22:05:55,914 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 22:05:55,915 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 22:05:55,915 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 22:05:55,916 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 22:05:55,916 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:05:55,917 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 22:05:55,917 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 22:05:55,917 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 22:05:55,918 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 22:05:55,918 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 22:05:55,919 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 22:05:55,919 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 22:05:55,920 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 22:05:55,920 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 22:05:55,921 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 22:05:55,921 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_23960e9f-e5c2-4cd3-925f-2811e5332cb7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23960e9f-e5c2-4cd3-925f-2811e5332cb7/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 33de5d7f20015c0808aeb1de8a96a544518a9ee4634466bd76c0c961f4a657cf [2023-11-24 22:05:56,205 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 22:05:56,242 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 22:05:56,245 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 22:05:56,247 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 22:05:56,248 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 22:05:56,250 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23960e9f-e5c2-4cd3-925f-2811e5332cb7/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/eca-rers2012/Problem12_label04.c [2023-11-24 22:05:59,347 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 22:05:59,963 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 22:05:59,965 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23960e9f-e5c2-4cd3-925f-2811e5332cb7/sv-benchmarks/c/eca-rers2012/Problem12_label04.c [2023-11-24 22:06:00,007 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23960e9f-e5c2-4cd3-925f-2811e5332cb7/bin/uautomizer-verify-NlZe1sFDwI/data/3a1d1bcbb/1addf45c5140473287d5bc6c7ca054be/FLAGc72f8e59c [2023-11-24 22:06:00,044 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23960e9f-e5c2-4cd3-925f-2811e5332cb7/bin/uautomizer-verify-NlZe1sFDwI/data/3a1d1bcbb/1addf45c5140473287d5bc6c7ca054be [2023-11-24 22:06:00,052 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 22:06:00,054 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 22:06:00,058 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 22:06:00,058 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 22:06:00,064 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 22:06:00,065 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:06:00" (1/1) ... [2023-11-24 22:06:00,066 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a9eb505 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:00, skipping insertion in model container [2023-11-24 22:06:00,067 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:06:00" (1/1) ... [2023-11-24 22:06:00,222 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 22:06:00,516 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_23960e9f-e5c2-4cd3-925f-2811e5332cb7/sv-benchmarks/c/eca-rers2012/Problem12_label04.c[7422,7435] [2023-11-24 22:06:01,628 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:06:01,642 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 22:06:01,683 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_23960e9f-e5c2-4cd3-925f-2811e5332cb7/sv-benchmarks/c/eca-rers2012/Problem12_label04.c[7422,7435] [2023-11-24 22:06:02,297 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:06:02,327 INFO L206 MainTranslator]: Completed translation [2023-11-24 22:06:02,328 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:02 WrapperNode [2023-11-24 22:06:02,328 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 22:06:02,330 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 22:06:02,330 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 22:06:02,330 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 22:06:02,338 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:02" (1/1) ... [2023-11-24 22:06:02,414 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:02" (1/1) ... [2023-11-24 22:06:02,805 INFO L138 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4758 [2023-11-24 22:06:02,805 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 22:06:02,806 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 22:06:02,806 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 22:06:02,806 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 22:06:02,819 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:02" (1/1) ... [2023-11-24 22:06:02,821 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:02" (1/1) ... [2023-11-24 22:06:02,971 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:02" (1/1) ... [2023-11-24 22:06:03,178 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 22:06:03,178 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:02" (1/1) ... [2023-11-24 22:06:03,178 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:02" (1/1) ... [2023-11-24 22:06:03,465 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:02" (1/1) ... [2023-11-24 22:06:03,510 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:02" (1/1) ... [2023-11-24 22:06:03,531 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:02" (1/1) ... [2023-11-24 22:06:03,548 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:02" (1/1) ... [2023-11-24 22:06:03,608 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 22:06:03,610 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 22:06:03,610 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 22:06:03,611 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 22:06:03,612 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:02" (1/1) ... [2023-11-24 22:06:03,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:06:03,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23960e9f-e5c2-4cd3-925f-2811e5332cb7/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:06:03,648 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23960e9f-e5c2-4cd3-925f-2811e5332cb7/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 22:06:03,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23960e9f-e5c2-4cd3-925f-2811e5332cb7/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 22:06:03,689 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 22:06:03,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 22:06:03,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 22:06:03,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 22:06:03,784 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 22:06:03,788 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 22:06:09,386 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 22:06:09,483 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 22:06:09,484 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-24 22:06:09,486 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:06:09 BoogieIcfgContainer [2023-11-24 22:06:09,486 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 22:06:09,490 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 22:06:09,491 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 22:06:09,494 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 22:06:09,495 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 10:06:00" (1/3) ... [2023-11-24 22:06:09,497 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38b4b1d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:06:09, skipping insertion in model container [2023-11-24 22:06:09,497 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:02" (2/3) ... [2023-11-24 22:06:09,498 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38b4b1d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:06:09, skipping insertion in model container [2023-11-24 22:06:09,499 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:06:09" (3/3) ... [2023-11-24 22:06:09,501 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label04.c [2023-11-24 22:06:09,524 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 22:06:09,524 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 22:06:09,622 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 22:06:09,631 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;@5f667cef, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 22:06:09,632 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 22:06:09,643 INFO L276 IsEmpty]: Start isEmpty. Operand has 756 states, 754 states have (on average 1.993368700265252) internal successors, (1503), 755 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states 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 22:06:09,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-24 22:06:09,654 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:06:09,655 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:06:09,656 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:06:09,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:09,664 INFO L85 PathProgramCache]: Analyzing trace with hash -986197224, now seen corresponding path program 1 times [2023-11-24 22:06:09,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:09,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92831504] [2023-11-24 22:06:09,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:09,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:09,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:09,912 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 22:06:09,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:09,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92831504] [2023-11-24 22:06:09,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92831504] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:09,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:09,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:06:09,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758137104] [2023-11-24 22:06:09,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:09,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-24 22:06:09,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:09,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-24 22:06:09,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 22:06:09,969 INFO L87 Difference]: Start difference. First operand has 756 states, 754 states have (on average 1.993368700265252) internal successors, (1503), 755 states have internal predecessors, (1503), 0 states have call successors, (0), 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 29.5) internal successors, (59), 2 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:10,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:06:10,069 INFO L93 Difference]: Finished difference Result 1511 states and 3005 transitions. [2023-11-24 22:06:10,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-24 22:06:10,071 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 29.5) internal successors, (59), 2 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-11-24 22:06:10,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:06:10,106 INFO L225 Difference]: With dead ends: 1511 [2023-11-24 22:06:10,106 INFO L226 Difference]: Without dead ends: 754 [2023-11-24 22:06:10,115 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 22:06:10,120 INFO L413 NwaCegarLoop]: 1438 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, 1438 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 22:06:10,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1438 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 22:06:10,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2023-11-24 22:06:10,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 754. [2023-11-24 22:06:10,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 1.9096945551128819) internal successors, (1438), 753 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states 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 22:06:10,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1438 transitions. [2023-11-24 22:06:10,206 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1438 transitions. Word has length 59 [2023-11-24 22:06:10,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:06:10,207 INFO L495 AbstractCegarLoop]: Abstraction has 754 states and 1438 transitions. [2023-11-24 22:06:10,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 29.5) internal successors, (59), 2 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:10,207 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1438 transitions. [2023-11-24 22:06:10,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-24 22:06:10,265 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:06:10,265 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:06:10,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 22:06:10,265 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:06:10,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:10,266 INFO L85 PathProgramCache]: Analyzing trace with hash 564443201, now seen corresponding path program 1 times [2023-11-24 22:06:10,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:10,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755804439] [2023-11-24 22:06:10,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:10,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:10,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:10,800 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 22:06:10,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:10,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755804439] [2023-11-24 22:06:10,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755804439] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:10,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:10,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:06:10,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297430558] [2023-11-24 22:06:10,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:10,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:06:10,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:10,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:06:10,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:06:10,810 INFO L87 Difference]: Start difference. First operand 754 states and 1438 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:20,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:06:20,084 INFO L93 Difference]: Finished difference Result 3009 states and 5747 transitions. [2023-11-24 22:06:20,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 22:06:20,086 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-11-24 22:06:20,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:06:20,106 INFO L225 Difference]: With dead ends: 3009 [2023-11-24 22:06:20,106 INFO L226 Difference]: Without dead ends: 2256 [2023-11-24 22:06:20,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 22:06:20,109 INFO L413 NwaCegarLoop]: 691 mSDtfsCounter, 2197 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 5155 mSolverCounterSat, 1245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2197 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 6400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1245 IncrementalHoareTripleChecker+Valid, 5155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2023-11-24 22:06:20,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2197 Valid, 709 Invalid, 6400 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1245 Valid, 5155 Invalid, 0 Unknown, 0 Unchecked, 8.9s Time] [2023-11-24 22:06:20,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2023-11-24 22:06:20,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 2256. [2023-11-24 22:06:20,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2256 states, 2255 states have (on average 1.5139689578713968) internal successors, (3414), 2255 states have internal predecessors, (3414), 0 states have call successors, (0), 0 states 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 22:06:20,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 3414 transitions. [2023-11-24 22:06:20,185 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 3414 transitions. Word has length 59 [2023-11-24 22:06:20,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:06:20,186 INFO L495 AbstractCegarLoop]: Abstraction has 2256 states and 3414 transitions. [2023-11-24 22:06:20,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:20,186 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 3414 transitions. [2023-11-24 22:06:20,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-11-24 22:06:20,190 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:06:20,191 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2023-11-24 22:06:20,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 22:06:20,193 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:06:20,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:20,203 INFO L85 PathProgramCache]: Analyzing trace with hash 834275826, now seen corresponding path program 1 times [2023-11-24 22:06:20,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:20,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066835452] [2023-11-24 22:06:20,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:20,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:20,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:20,735 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:06:20,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:20,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066835452] [2023-11-24 22:06:20,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066835452] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:20,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:20,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:06:20,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699509964] [2023-11-24 22:06:20,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:20,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:06:20,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:20,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:06:20,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:06:20,744 INFO L87 Difference]: Start difference. First operand 2256 states and 3414 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states 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 22:06:26,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:06:26,322 INFO L93 Difference]: Finished difference Result 6050 states and 9519 transitions. [2023-11-24 22:06:26,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 22:06:26,323 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 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 130 [2023-11-24 22:06:26,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:06:26,347 INFO L225 Difference]: With dead ends: 6050 [2023-11-24 22:06:26,347 INFO L226 Difference]: Without dead ends: 3758 [2023-11-24 22:06:26,350 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 22:06:26,351 INFO L413 NwaCegarLoop]: 691 mSDtfsCounter, 703 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 3108 mSolverCounterSat, 729 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 703 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 3837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 729 IncrementalHoareTripleChecker+Valid, 3108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2023-11-24 22:06:26,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [703 Valid, 704 Invalid, 3837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [729 Valid, 3108 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2023-11-24 22:06:26,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3758 states. [2023-11-24 22:06:26,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3758 to 3758. [2023-11-24 22:06:26,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3758 states, 3757 states have (on average 1.3305829118977908) internal successors, (4999), 3757 states have internal predecessors, (4999), 0 states have call successors, (0), 0 states 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 22:06:26,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3758 states to 3758 states and 4999 transitions. [2023-11-24 22:06:26,446 INFO L78 Accepts]: Start accepts. Automaton has 3758 states and 4999 transitions. Word has length 130 [2023-11-24 22:06:26,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:06:26,447 INFO L495 AbstractCegarLoop]: Abstraction has 3758 states and 4999 transitions. [2023-11-24 22:06:26,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states 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 22:06:26,447 INFO L276 IsEmpty]: Start isEmpty. Operand 3758 states and 4999 transitions. [2023-11-24 22:06:26,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2023-11-24 22:06:26,453 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:06:26,454 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:06:26,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 22:06:26,454 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:06:26,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:26,455 INFO L85 PathProgramCache]: Analyzing trace with hash 326529904, now seen corresponding path program 1 times [2023-11-24 22:06:26,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:26,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42407829] [2023-11-24 22:06:26,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:26,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:26,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:27,079 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-24 22:06:27,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:27,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42407829] [2023-11-24 22:06:27,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42407829] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:27,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:27,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:06:27,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663146915] [2023-11-24 22:06:27,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:27,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:06:27,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:27,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:06:27,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:06:27,086 INFO L87 Difference]: Start difference. First operand 3758 states and 4999 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 22:06:31,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:06:31,883 INFO L93 Difference]: Finished difference Result 9056 states and 12623 transitions. [2023-11-24 22:06:31,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 22:06:31,884 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 271 [2023-11-24 22:06:31,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:06:31,915 INFO L225 Difference]: With dead ends: 9056 [2023-11-24 22:06:31,915 INFO L226 Difference]: Without dead ends: 5262 [2023-11-24 22:06:31,920 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 22:06:31,921 INFO L413 NwaCegarLoop]: 307 mSDtfsCounter, 850 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 3409 mSolverCounterSat, 553 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 850 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 3962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 553 IncrementalHoareTripleChecker+Valid, 3409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-11-24 22:06:31,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [850 Valid, 321 Invalid, 3962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [553 Valid, 3409 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2023-11-24 22:06:31,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5262 states. [2023-11-24 22:06:32,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5262 to 5260. [2023-11-24 22:06:32,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5260 states, 5259 states have (on average 1.3242061228370412) internal successors, (6964), 5259 states have internal predecessors, (6964), 0 states have call successors, (0), 0 states 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 22:06:32,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5260 states to 5260 states and 6964 transitions. [2023-11-24 22:06:32,042 INFO L78 Accepts]: Start accepts. Automaton has 5260 states and 6964 transitions. Word has length 271 [2023-11-24 22:06:32,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:06:32,044 INFO L495 AbstractCegarLoop]: Abstraction has 5260 states and 6964 transitions. [2023-11-24 22:06:32,045 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 22:06:32,045 INFO L276 IsEmpty]: Start isEmpty. Operand 5260 states and 6964 transitions. [2023-11-24 22:06:32,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2023-11-24 22:06:32,053 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:06:32,053 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:06:32,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 22:06:32,054 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:06:32,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:32,055 INFO L85 PathProgramCache]: Analyzing trace with hash 2005419277, now seen corresponding path program 1 times [2023-11-24 22:06:32,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:32,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691853519] [2023-11-24 22:06:32,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:32,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:32,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:32,360 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 199 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:06:32,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:32,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691853519] [2023-11-24 22:06:32,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691853519] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:32,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:32,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:06:32,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781171978] [2023-11-24 22:06:32,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:32,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:06:32,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:32,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:06:32,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:06:32,365 INFO L87 Difference]: Start difference. First operand 5260 states and 6964 transitions. Second operand has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states 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 22:06:36,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:06:36,708 INFO L93 Difference]: Finished difference Result 15025 states and 20133 transitions. [2023-11-24 22:06:36,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:06:36,708 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 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 285 [2023-11-24 22:06:36,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:06:36,760 INFO L225 Difference]: With dead ends: 15025 [2023-11-24 22:06:36,760 INFO L226 Difference]: Without dead ends: 9766 [2023-11-24 22:06:36,767 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 22:06:36,768 INFO L413 NwaCegarLoop]: 1251 mSDtfsCounter, 676 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2631 mSolverCounterSat, 388 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 1257 SdHoareTripleChecker+Invalid, 3019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 388 IncrementalHoareTripleChecker+Valid, 2631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-11-24 22:06:36,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [676 Valid, 1257 Invalid, 3019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [388 Valid, 2631 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-11-24 22:06:36,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9766 states. [2023-11-24 22:06:36,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9766 to 9766. [2023-11-24 22:06:36,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9766 states, 9765 states have (on average 1.2976958525345623) internal successors, (12672), 9765 states have internal predecessors, (12672), 0 states have call successors, (0), 0 states 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 22:06:36,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9766 states to 9766 states and 12672 transitions. [2023-11-24 22:06:36,977 INFO L78 Accepts]: Start accepts. Automaton has 9766 states and 12672 transitions. Word has length 285 [2023-11-24 22:06:36,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:06:36,978 INFO L495 AbstractCegarLoop]: Abstraction has 9766 states and 12672 transitions. [2023-11-24 22:06:36,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states 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 22:06:36,979 INFO L276 IsEmpty]: Start isEmpty. Operand 9766 states and 12672 transitions. [2023-11-24 22:06:36,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2023-11-24 22:06:36,991 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:06:36,992 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:06:36,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 22:06:36,992 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:06:36,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:36,994 INFO L85 PathProgramCache]: Analyzing trace with hash -91244713, now seen corresponding path program 1 times [2023-11-24 22:06:36,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:36,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397986069] [2023-11-24 22:06:36,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:36,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:37,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:37,746 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-11-24 22:06:37,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:37,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397986069] [2023-11-24 22:06:37,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397986069] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:37,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:37,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:06:37,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992043635] [2023-11-24 22:06:37,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:37,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:06:37,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:37,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:06:37,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:06:37,749 INFO L87 Difference]: Start difference. First operand 9766 states and 12672 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states 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 22:06:41,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:06:41,859 INFO L93 Difference]: Finished difference Result 26290 states and 34789 transitions. [2023-11-24 22:06:41,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:06:41,860 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 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 289 [2023-11-24 22:06:41,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:06:41,917 INFO L225 Difference]: With dead ends: 26290 [2023-11-24 22:06:41,917 INFO L226 Difference]: Without dead ends: 16525 [2023-11-24 22:06:41,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 22:06:41,933 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 792 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2325 mSolverCounterSat, 653 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 792 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 2978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 653 IncrementalHoareTripleChecker+Valid, 2325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-11-24 22:06:41,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [792 Valid, 201 Invalid, 2978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [653 Valid, 2325 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-11-24 22:06:41,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16525 states. [2023-11-24 22:06:42,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16525 to 14272. [2023-11-24 22:06:42,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14272 states, 14271 states have (on average 1.3458061803657768) internal successors, (19206), 14271 states have internal predecessors, (19206), 0 states have call successors, (0), 0 states 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 22:06:42,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14272 states to 14272 states and 19206 transitions. [2023-11-24 22:06:42,255 INFO L78 Accepts]: Start accepts. Automaton has 14272 states and 19206 transitions. Word has length 289 [2023-11-24 22:06:42,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:06:42,261 INFO L495 AbstractCegarLoop]: Abstraction has 14272 states and 19206 transitions. [2023-11-24 22:06:42,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states 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 22:06:42,262 INFO L276 IsEmpty]: Start isEmpty. Operand 14272 states and 19206 transitions. [2023-11-24 22:06:42,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2023-11-24 22:06:42,269 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:06:42,270 INFO L195 NwaCegarLoop]: trace histogram [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, 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 22:06:42,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 22:06:42,271 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:06:42,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:42,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1166098951, now seen corresponding path program 1 times [2023-11-24 22:06:42,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:42,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466332026] [2023-11-24 22:06:42,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:42,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:42,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:42,542 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-11-24 22:06:42,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:42,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466332026] [2023-11-24 22:06:42,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466332026] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:42,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:42,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:06:42,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664957921] [2023-11-24 22:06:42,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:42,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:06:42,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:42,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:06:42,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:06:42,546 INFO L87 Difference]: Start difference. First operand 14272 states and 19206 transitions. Second operand has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 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 22:06:46,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:06:46,334 INFO L93 Difference]: Finished difference Result 35302 states and 47602 transitions. [2023-11-24 22:06:46,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:06:46,335 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 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 293 [2023-11-24 22:06:46,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:06:46,375 INFO L225 Difference]: With dead ends: 35302 [2023-11-24 22:06:46,375 INFO L226 Difference]: Without dead ends: 21031 [2023-11-24 22:06:46,392 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 22:06:46,393 INFO L413 NwaCegarLoop]: 491 mSDtfsCounter, 671 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1996 mSolverCounterSat, 756 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 2752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 756 IncrementalHoareTripleChecker+Valid, 1996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-11-24 22:06:46,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [671 Valid, 497 Invalid, 2752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [756 Valid, 1996 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-11-24 22:06:46,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21031 states. [2023-11-24 22:06:46,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21031 to 18778. [2023-11-24 22:06:46,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18778 states, 18777 states have (on average 1.1999254406987272) internal successors, (22531), 18777 states have internal predecessors, (22531), 0 states have call successors, (0), 0 states 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 22:06:46,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18778 states to 18778 states and 22531 transitions. [2023-11-24 22:06:46,735 INFO L78 Accepts]: Start accepts. Automaton has 18778 states and 22531 transitions. Word has length 293 [2023-11-24 22:06:46,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:06:46,735 INFO L495 AbstractCegarLoop]: Abstraction has 18778 states and 22531 transitions. [2023-11-24 22:06:46,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 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 22:06:46,736 INFO L276 IsEmpty]: Start isEmpty. Operand 18778 states and 22531 transitions. [2023-11-24 22:06:46,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2023-11-24 22:06:46,746 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:06:46,746 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2023-11-24 22:06:46,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 22:06:46,747 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:06:46,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:46,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1093506240, now seen corresponding path program 1 times [2023-11-24 22:06:46,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:46,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557352931] [2023-11-24 22:06:46,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:46,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:46,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:47,534 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 344 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-24 22:06:47,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:47,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557352931] [2023-11-24 22:06:47,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557352931] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:47,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:47,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:06:47,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924803683] [2023-11-24 22:06:47,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:47,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:06:47,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:47,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:06:47,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:06:47,537 INFO L87 Difference]: Start difference. First operand 18778 states and 22531 transitions. Second operand has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 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)