./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem06_label01.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b5fb7b8-0168-4ac1-bafd-8f97d235a5d1/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b5fb7b8-0168-4ac1-bafd-8f97d235a5d1/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b5fb7b8-0168-4ac1-bafd-8f97d235a5d1/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b5fb7b8-0168-4ac1-bafd-8f97d235a5d1/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem06_label01.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b5fb7b8-0168-4ac1-bafd-8f97d235a5d1/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b5fb7b8-0168-4ac1-bafd-8f97d235a5d1/bin/uautomizer-verify-uCwYo4JHxu --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 173ffb2aa4235596187a9f186d01c2f04dfb3a4a1936620bbd10096171bec1ed --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:36:43,879 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:36:43,947 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b5fb7b8-0168-4ac1-bafd-8f97d235a5d1/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:36:43,953 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:36:43,954 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:36:43,980 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:36:43,981 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:36:43,981 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:36:43,982 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:36:43,983 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:36:43,984 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:36:43,984 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:36:43,985 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:36:43,986 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:36:43,986 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:36:43,987 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:36:43,988 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:36:43,988 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:36:43,989 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:36:43,990 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:36:43,990 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:36:43,991 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:36:43,991 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:36:43,992 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:36:43,992 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:36:43,993 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:36:43,993 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:36:43,994 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:36:43,994 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:36:43,995 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:36:43,995 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:36:43,996 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:36:43,996 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:36:43,996 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:36:43,997 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:36:43,997 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:36:43,997 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:36:43,998 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:36:43,998 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:36:43,998 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_9b5fb7b8-0168-4ac1-bafd-8f97d235a5d1/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b5fb7b8-0168-4ac1-bafd-8f97d235a5d1/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 173ffb2aa4235596187a9f186d01c2f04dfb3a4a1936620bbd10096171bec1ed [2023-11-19 07:36:44,287 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:36:44,321 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:36:44,324 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:36:44,326 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:36:44,326 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:36:44,328 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b5fb7b8-0168-4ac1-bafd-8f97d235a5d1/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/eca-rers2012/Problem06_label01.c [2023-11-19 07:36:47,454 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:36:48,310 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:36:48,311 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b5fb7b8-0168-4ac1-bafd-8f97d235a5d1/sv-benchmarks/c/eca-rers2012/Problem06_label01.c [2023-11-19 07:36:48,363 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b5fb7b8-0168-4ac1-bafd-8f97d235a5d1/bin/uautomizer-verify-uCwYo4JHxu/data/488ead88c/e1c508b59ecb4e698f8b8a5b8fa27e7a/FLAGbe5cecfc5 [2023-11-19 07:36:48,378 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b5fb7b8-0168-4ac1-bafd-8f97d235a5d1/bin/uautomizer-verify-uCwYo4JHxu/data/488ead88c/e1c508b59ecb4e698f8b8a5b8fa27e7a [2023-11-19 07:36:48,381 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:36:48,383 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:36:48,384 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:36:48,384 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:36:48,390 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:36:48,392 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:36:48" (1/1) ... [2023-11-19 07:36:48,394 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cca3f06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:48, skipping insertion in model container [2023-11-19 07:36:48,394 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:36:48" (1/1) ... [2023-11-19 07:36:48,683 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:36:50,808 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_9b5fb7b8-0168-4ac1-bafd-8f97d235a5d1/sv-benchmarks/c/eca-rers2012/Problem06_label01.c[330808,330821] [2023-11-19 07:36:50,840 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:36:50,854 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:36:52,024 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_9b5fb7b8-0168-4ac1-bafd-8f97d235a5d1/sv-benchmarks/c/eca-rers2012/Problem06_label01.c[330808,330821] [2023-11-19 07:36:52,099 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:36:52,146 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:36:52,146 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:52 WrapperNode [2023-11-19 07:36:52,146 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:36:52,147 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:36:52,148 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:36:52,148 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:36:52,155 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:52" (1/1) ... [2023-11-19 07:36:52,247 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:52" (1/1) ... [2023-11-19 07:36:52,656 INFO L138 Inliner]: procedures = 18, calls = 12, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 10174 [2023-11-19 07:36:52,657 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:36:52,657 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:36:52,657 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:36:52,661 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:36:52,670 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:52" (1/1) ... [2023-11-19 07:36:52,670 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:52" (1/1) ... [2023-11-19 07:36:52,734 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:52" (1/1) ... [2023-11-19 07:36:52,735 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:52" (1/1) ... [2023-11-19 07:36:53,139 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:52" (1/1) ... [2023-11-19 07:36:53,195 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:52" (1/1) ... [2023-11-19 07:36:53,213 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:52" (1/1) ... [2023-11-19 07:36:53,249 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:52" (1/1) ... [2023-11-19 07:36:53,348 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:36:53,349 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:36:53,350 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:36:53,350 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:36:53,351 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:52" (1/1) ... [2023-11-19 07:36:53,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:36:53,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b5fb7b8-0168-4ac1-bafd-8f97d235a5d1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:53,458 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b5fb7b8-0168-4ac1-bafd-8f97d235a5d1/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:36:53,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b5fb7b8-0168-4ac1-bafd-8f97d235a5d1/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:36:53,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:36:53,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:36:53,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:36:53,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:36:53,752 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:36:53,754 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:37:01,445 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:37:01,472 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:37:01,473 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 07:37:01,488 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:37:01 BoogieIcfgContainer [2023-11-19 07:37:01,488 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:37:01,492 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:37:01,493 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:37:01,496 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:37:01,498 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:36:48" (1/3) ... [2023-11-19 07:37:01,499 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f2289d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:37:01, skipping insertion in model container [2023-11-19 07:37:01,499 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:52" (2/3) ... [2023-11-19 07:37:01,501 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f2289d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:37:01, skipping insertion in model container [2023-11-19 07:37:01,501 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:37:01" (3/3) ... [2023-11-19 07:37:01,502 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem06_label01.c [2023-11-19 07:37:01,523 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:37:01,523 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:37:01,624 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:37:01,632 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;@767f9a12, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:37:01,633 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:37:01,646 INFO L276 IsEmpty]: Start isEmpty. Operand has 1290 states, 1288 states have (on average 1.8571428571428572) internal successors, (2392), 1289 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:01,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 935 [2023-11-19 07:37:01,719 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:01,721 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:01,722 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:37:01,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:01,732 INFO L85 PathProgramCache]: Analyzing trace with hash 222572815, now seen corresponding path program 1 times [2023-11-19 07:37:01,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:01,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61318583] [2023-11-19 07:37:01,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:01,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:02,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:05,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:05,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:05,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61318583] [2023-11-19 07:37:05,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61318583] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:05,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:05,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:37:05,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262137747] [2023-11-19 07:37:05,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:05,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:37:05,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:05,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:37:05,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:37:05,497 INFO L87 Difference]: Start difference. First operand has 1290 states, 1288 states have (on average 1.8571428571428572) internal successors, (2392), 1289 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 311.3333333333333) internal successors, (934), 2 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:11,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:11,783 INFO L93 Difference]: Finished difference Result 3685 states and 6931 transitions. [2023-11-19 07:37:11,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:37:11,786 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 311.3333333333333) internal successors, (934), 2 states have internal predecessors, (934), 0 states have call successors, (0), 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 934 [2023-11-19 07:37:11,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:11,831 INFO L225 Difference]: With dead ends: 3685 [2023-11-19 07:37:11,831 INFO L226 Difference]: Without dead ends: 2331 [2023-11-19 07:37:11,843 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 [2023-11-19 07:37:11,847 INFO L413 NwaCegarLoop]: 749 mSDtfsCounter, 280 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 3138 mSolverCounterSat, 1287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 4425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1287 IncrementalHoareTripleChecker+Valid, 3138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:11,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 886 Invalid, 4425 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1287 Valid, 3138 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2023-11-19 07:37:11,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2331 states. [2023-11-19 07:37:11,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2331 to 2280. [2023-11-19 07:37:11,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2280 states, 2279 states have (on average 1.7121544537077666) internal successors, (3902), 2279 states have internal predecessors, (3902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:12,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2280 states to 2280 states and 3902 transitions. [2023-11-19 07:37:12,002 INFO L78 Accepts]: Start accepts. Automaton has 2280 states and 3902 transitions. Word has length 934 [2023-11-19 07:37:12,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:12,007 INFO L495 AbstractCegarLoop]: Abstraction has 2280 states and 3902 transitions. [2023-11-19 07:37:12,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 311.3333333333333) internal successors, (934), 2 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:12,008 INFO L276 IsEmpty]: Start isEmpty. Operand 2280 states and 3902 transitions. [2023-11-19 07:37:12,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 939 [2023-11-19 07:37:12,048 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:12,050 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:12,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:37:12,051 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:37:12,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:12,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1607800246, now seen corresponding path program 1 times [2023-11-19 07:37:12,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:12,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70950694] [2023-11-19 07:37:12,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:12,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:12,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:13,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:13,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:13,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70950694] [2023-11-19 07:37:13,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70950694] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:13,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:13,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:37:13,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915884421] [2023-11-19 07:37:13,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:13,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:37:13,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:13,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:37:13,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:37:13,851 INFO L87 Difference]: Start difference. First operand 2280 states and 3902 transitions. Second operand has 3 states, 3 states have (on average 312.6666666666667) internal successors, (938), 2 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:15,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:15,809 INFO L93 Difference]: Finished difference Result 6820 states and 11686 transitions. [2023-11-19 07:37:15,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:37:15,810 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 312.6666666666667) internal successors, (938), 2 states have internal predecessors, (938), 0 states have call successors, (0), 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 938 [2023-11-19 07:37:15,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:15,944 INFO L225 Difference]: With dead ends: 6820 [2023-11-19 07:37:15,944 INFO L226 Difference]: Without dead ends: 4542 [2023-11-19 07:37:15,947 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 [2023-11-19 07:37:15,949 INFO L413 NwaCegarLoop]: 1736 mSDtfsCounter, 2097 mSDsluCounter, 1611 mSDsCounter, 0 mSdLazyCounter, 1052 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2097 SdHoareTripleChecker+Valid, 3347 SdHoareTripleChecker+Invalid, 1277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 1052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:15,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2097 Valid, 3347 Invalid, 1277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 1052 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-19 07:37:15,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4542 states. [2023-11-19 07:37:16,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4542 to 4538. [2023-11-19 07:37:16,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4538 states, 4537 states have (on average 1.7101608992726471) internal successors, (7759), 4537 states have internal predecessors, (7759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:16,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4538 states to 4538 states and 7759 transitions. [2023-11-19 07:37:16,067 INFO L78 Accepts]: Start accepts. Automaton has 4538 states and 7759 transitions. Word has length 938 [2023-11-19 07:37:16,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:16,067 INFO L495 AbstractCegarLoop]: Abstraction has 4538 states and 7759 transitions. [2023-11-19 07:37:16,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 312.6666666666667) internal successors, (938), 2 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:16,068 INFO L276 IsEmpty]: Start isEmpty. Operand 4538 states and 7759 transitions. [2023-11-19 07:37:16,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 940 [2023-11-19 07:37:16,085 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:16,086 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:16,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:37:16,087 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:37:16,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:16,097 INFO L85 PathProgramCache]: Analyzing trace with hash 938317142, now seen corresponding path program 1 times [2023-11-19 07:37:16,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:16,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524874932] [2023-11-19 07:37:16,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:16,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:16,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:17,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:17,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:17,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524874932] [2023-11-19 07:37:17,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524874932] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:17,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:17,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:37:17,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683965507] [2023-11-19 07:37:17,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:17,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:37:17,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:17,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:37:17,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:37:17,627 INFO L87 Difference]: Start difference. First operand 4538 states and 7759 transitions. Second operand has 3 states, 3 states have (on average 313.0) internal successors, (939), 2 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:23,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:23,182 INFO L93 Difference]: Finished difference Result 13147 states and 22626 transitions. [2023-11-19 07:37:23,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:37:23,184 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 313.0) internal successors, (939), 2 states have internal predecessors, (939), 0 states have call successors, (0), 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 939 [2023-11-19 07:37:23,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:23,238 INFO L225 Difference]: With dead ends: 13147 [2023-11-19 07:37:23,239 INFO L226 Difference]: Without dead ends: 8611 [2023-11-19 07:37:23,247 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 [2023-11-19 07:37:23,248 INFO L413 NwaCegarLoop]: 1004 mSDtfsCounter, 1235 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 3253 mSolverCounterSat, 815 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1235 SdHoareTripleChecker+Valid, 1162 SdHoareTripleChecker+Invalid, 4068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 815 IncrementalHoareTripleChecker+Valid, 3253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:23,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1235 Valid, 1162 Invalid, 4068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [815 Valid, 3253 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2023-11-19 07:37:23,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8611 states. [2023-11-19 07:37:23,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8611 to 8575. [2023-11-19 07:37:23,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8575 states, 8574 states have (on average 1.5622813156053184) internal successors, (13395), 8574 states have internal predecessors, (13395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:23,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8575 states to 8575 states and 13395 transitions. [2023-11-19 07:37:23,465 INFO L78 Accepts]: Start accepts. Automaton has 8575 states and 13395 transitions. Word has length 939 [2023-11-19 07:37:23,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:23,466 INFO L495 AbstractCegarLoop]: Abstraction has 8575 states and 13395 transitions. [2023-11-19 07:37:23,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 313.0) internal successors, (939), 2 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:23,467 INFO L276 IsEmpty]: Start isEmpty. Operand 8575 states and 13395 transitions. [2023-11-19 07:37:23,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 948 [2023-11-19 07:37:23,492 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:23,493 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:23,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:37:23,494 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:37:23,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:23,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1903845223, now seen corresponding path program 1 times [2023-11-19 07:37:23,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:23,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30011256] [2023-11-19 07:37:23,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:23,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:23,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:25,370 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 07:37:25,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:25,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30011256] [2023-11-19 07:37:25,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30011256] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:25,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:25,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:37:25,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513552855] [2023-11-19 07:37:25,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:25,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:37:25,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:25,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:37:25,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:37:25,377 INFO L87 Difference]: Start difference. First operand 8575 states and 13395 transitions. Second operand has 3 states, 3 states have (on average 314.3333333333333) internal successors, (943), 2 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:30,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:30,370 INFO L93 Difference]: Finished difference Result 25170 states and 39430 transitions. [2023-11-19 07:37:30,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:37:30,371 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 314.3333333333333) internal successors, (943), 2 states have internal predecessors, (943), 0 states have call successors, (0), 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 947 [2023-11-19 07:37:30,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:30,429 INFO L225 Difference]: With dead ends: 25170 [2023-11-19 07:37:30,430 INFO L226 Difference]: Without dead ends: 16597 [2023-11-19 07:37:30,441 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 [2023-11-19 07:37:30,443 INFO L413 NwaCegarLoop]: 1209 mSDtfsCounter, 1134 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 3098 mSolverCounterSat, 983 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1134 SdHoareTripleChecker+Valid, 1395 SdHoareTripleChecker+Invalid, 4081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 983 IncrementalHoareTripleChecker+Valid, 3098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:30,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1134 Valid, 1395 Invalid, 4081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [983 Valid, 3098 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2023-11-19 07:37:30,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16597 states. [2023-11-19 07:37:30,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16597 to 16579. [2023-11-19 07:37:30,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16579 states, 16578 states have (on average 1.39854023404512) internal successors, (23185), 16578 states have internal predecessors, (23185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:30,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16579 states to 16579 states and 23185 transitions. [2023-11-19 07:37:30,822 INFO L78 Accepts]: Start accepts. Automaton has 16579 states and 23185 transitions. Word has length 947 [2023-11-19 07:37:30,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:30,822 INFO L495 AbstractCegarLoop]: Abstraction has 16579 states and 23185 transitions. [2023-11-19 07:37:30,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 314.3333333333333) internal successors, (943), 2 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:30,823 INFO L276 IsEmpty]: Start isEmpty. Operand 16579 states and 23185 transitions. [2023-11-19 07:37:30,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 969 [2023-11-19 07:37:30,863 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:30,865 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:30,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:37:30,865 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:37:30,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:30,867 INFO L85 PathProgramCache]: Analyzing trace with hash 913862682, now seen corresponding path program 1 times [2023-11-19 07:37:30,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:30,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348663171] [2023-11-19 07:37:30,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:30,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms