./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem11_label11.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995f8147-f8e4-42ba-89ea-8e7bfcd92217/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995f8147-f8e4-42ba-89ea-8e7bfcd92217/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995f8147-f8e4-42ba-89ea-8e7bfcd92217/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995f8147-f8e4-42ba-89ea-8e7bfcd92217/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem11_label11.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995f8147-f8e4-42ba-89ea-8e7bfcd92217/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995f8147-f8e4-42ba-89ea-8e7bfcd92217/bin/uautomizer-verify-VRDe98Ueme --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 2521d3888c3910ac16b8a52868332f768d7d80524e896b9e06e11f157c249614 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:49:31,506 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:49:31,620 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995f8147-f8e4-42ba-89ea-8e7bfcd92217/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:49:31,629 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:49:31,631 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:49:31,672 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:49:31,681 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:49:31,682 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:49:31,683 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:49:31,690 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:49:31,691 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:49:31,692 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:49:31,693 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:49:31,695 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:49:31,696 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:49:31,696 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:49:31,697 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:49:31,697 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:49:31,698 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:49:31,698 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:49:31,699 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:49:31,700 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:49:31,700 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:49:31,701 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:49:31,701 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:49:31,701 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:49:31,702 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:49:31,703 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:49:31,704 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:49:31,704 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:49:31,706 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:49:31,707 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:49:31,707 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:49:31,707 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:49:31,708 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:49:31,708 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:49:31,708 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:49:31,708 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:49:31,709 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:49:31,709 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:49:31,709 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:49:31,710 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:49:31,711 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_995f8147-f8e4-42ba-89ea-8e7bfcd92217/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995f8147-f8e4-42ba-89ea-8e7bfcd92217/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2521d3888c3910ac16b8a52868332f768d7d80524e896b9e06e11f157c249614 [2023-11-26 11:49:32,071 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:49:32,105 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:49:32,108 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:49:32,109 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:49:32,109 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:49:32,111 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995f8147-f8e4-42ba-89ea-8e7bfcd92217/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/eca-rers2012/Problem11_label11.c [2023-11-26 11:49:35,249 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:49:35,605 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:49:35,606 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995f8147-f8e4-42ba-89ea-8e7bfcd92217/sv-benchmarks/c/eca-rers2012/Problem11_label11.c [2023-11-26 11:49:35,622 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995f8147-f8e4-42ba-89ea-8e7bfcd92217/bin/uautomizer-verify-VRDe98Ueme/data/478be8eba/c7a74f26972a4755aca09e2461e83f48/FLAG65c400413 [2023-11-26 11:49:35,638 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995f8147-f8e4-42ba-89ea-8e7bfcd92217/bin/uautomizer-verify-VRDe98Ueme/data/478be8eba/c7a74f26972a4755aca09e2461e83f48 [2023-11-26 11:49:35,640 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:49:35,651 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:49:35,653 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:49:35,653 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:49:35,659 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:49:35,662 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:49:35" (1/1) ... [2023-11-26 11:49:35,663 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6825005a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:35, skipping insertion in model container [2023-11-26 11:49:35,663 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:49:35" (1/1) ... [2023-11-26 11:49:35,742 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:49:36,047 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_995f8147-f8e4-42ba-89ea-8e7bfcd92217/sv-benchmarks/c/eca-rers2012/Problem11_label11.c[8791,8804] [2023-11-26 11:49:36,388 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:49:36,410 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:49:36,467 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_995f8147-f8e4-42ba-89ea-8e7bfcd92217/sv-benchmarks/c/eca-rers2012/Problem11_label11.c[8791,8804] [2023-11-26 11:49:36,683 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:49:36,701 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:49:36,701 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:36 WrapperNode [2023-11-26 11:49:36,701 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:49:36,703 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:49:36,703 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:49:36,703 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:49:36,711 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:36" (1/1) ... [2023-11-26 11:49:36,756 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:36" (1/1) ... [2023-11-26 11:49:36,860 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1000 [2023-11-26 11:49:36,860 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:49:36,861 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:49:36,861 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:49:36,862 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:49:36,874 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:36" (1/1) ... [2023-11-26 11:49:36,874 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:36" (1/1) ... [2023-11-26 11:49:36,885 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:36" (1/1) ... [2023-11-26 11:49:36,927 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]. [2023-11-26 11:49:36,928 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:36" (1/1) ... [2023-11-26 11:49:36,928 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:36" (1/1) ... [2023-11-26 11:49:36,992 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:36" (1/1) ... [2023-11-26 11:49:37,016 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:36" (1/1) ... [2023-11-26 11:49:37,032 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:36" (1/1) ... [2023-11-26 11:49:37,044 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:36" (1/1) ... [2023-11-26 11:49:37,061 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:49:37,063 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:49:37,063 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:49:37,063 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:49:37,064 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:36" (1/1) ... [2023-11-26 11:49:37,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:49:37,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995f8147-f8e4-42ba-89ea-8e7bfcd92217/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:49:37,100 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995f8147-f8e4-42ba-89ea-8e7bfcd92217/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:49:37,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995f8147-f8e4-42ba-89ea-8e7bfcd92217/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:49:37,139 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:49:37,139 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:49:37,139 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:49:37,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:49:37,217 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:49:37,219 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:49:39,148 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:49:39,232 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:49:39,232 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 11:49:39,233 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:49:39 BoogieIcfgContainer [2023-11-26 11:49:39,233 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:49:39,235 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:49:39,236 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:49:39,239 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:49:39,239 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:49:35" (1/3) ... [2023-11-26 11:49:39,240 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a99f7ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:49:39, skipping insertion in model container [2023-11-26 11:49:39,240 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:36" (2/3) ... [2023-11-26 11:49:39,241 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a99f7ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:49:39, skipping insertion in model container [2023-11-26 11:49:39,241 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:49:39" (3/3) ... [2023-11-26 11:49:39,242 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label11.c [2023-11-26 11:49:39,262 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:49:39,262 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:49:39,318 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:49:39,326 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;@27267ec0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:49:39,326 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 11:49:39,331 INFO L276 IsEmpty]: Start isEmpty. Operand has 221 states, 219 states have (on average 1.917808219178082) internal successors, (420), 220 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:39,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-26 11:49:39,340 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:39,341 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] [2023-11-26 11:49:39,342 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:39,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:39,348 INFO L85 PathProgramCache]: Analyzing trace with hash -877625866, now seen corresponding path program 1 times [2023-11-26 11:49:39,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:39,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583587826] [2023-11-26 11:49:39,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:39,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:39,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:39,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:39,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:39,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583587826] [2023-11-26 11:49:39,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583587826] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:39,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:39,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:49:39,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234649938] [2023-11-26 11:49:39,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:39,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 11:49:39,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:39,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 11:49:39,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:49:39,607 INFO L87 Difference]: Start difference. First operand has 221 states, 219 states have (on average 1.917808219178082) internal successors, (420), 220 states have internal predecessors, (420), 0 states have call successors, (0), 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 30.0) internal successors, (60), 2 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:39,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:39,665 INFO L93 Difference]: Finished difference Result 441 states and 839 transitions. [2023-11-26 11:49:39,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 11:49:39,671 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 30.0) internal successors, (60), 2 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2023-11-26 11:49:39,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:39,682 INFO L225 Difference]: With dead ends: 441 [2023-11-26 11:49:39,682 INFO L226 Difference]: Without dead ends: 219 [2023-11-26 11:49:39,686 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 [2023-11-26 11:49:39,690 INFO L413 NwaCegarLoop]: 355 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, 355 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 [2023-11-26 11:49:39,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 355 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:49:39,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2023-11-26 11:49:39,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2023-11-26 11:49:39,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 1.628440366972477) internal successors, (355), 218 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:39,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 355 transitions. [2023-11-26 11:49:39,739 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 355 transitions. Word has length 60 [2023-11-26 11:49:39,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:39,739 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 355 transitions. [2023-11-26 11:49:39,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 30.0) internal successors, (60), 2 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:39,740 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 355 transitions. [2023-11-26 11:49:39,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-26 11:49:39,742 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:39,743 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] [2023-11-26 11:49:39,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:49:39,743 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:39,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:39,744 INFO L85 PathProgramCache]: Analyzing trace with hash 53094758, now seen corresponding path program 1 times [2023-11-26 11:49:39,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:39,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676402771] [2023-11-26 11:49:39,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:39,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:39,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:40,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:40,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:40,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676402771] [2023-11-26 11:49:40,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676402771] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:40,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:40,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:49:40,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288874901] [2023-11-26 11:49:40,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:40,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:49:40,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:40,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:49:40,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:49:40,031 INFO L87 Difference]: Start difference. First operand 219 states and 355 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 2 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:41,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:41,197 INFO L93 Difference]: Finished difference Result 639 states and 1042 transitions. [2023-11-26 11:49:41,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:49:41,198 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 2 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2023-11-26 11:49:41,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:41,202 INFO L225 Difference]: With dead ends: 639 [2023-11-26 11:49:41,203 INFO L226 Difference]: Without dead ends: 421 [2023-11-26 11:49:41,204 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 [2023-11-26 11:49:41,206 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 151 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:41,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 120 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-26 11:49:41,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2023-11-26 11:49:41,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 411. [2023-11-26 11:49:41,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 1.524390243902439) internal successors, (625), 410 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:41,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 625 transitions. [2023-11-26 11:49:41,240 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 625 transitions. Word has length 60 [2023-11-26 11:49:41,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:41,241 INFO L495 AbstractCegarLoop]: Abstraction has 411 states and 625 transitions. [2023-11-26 11:49:41,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 2 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:41,242 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 625 transitions. [2023-11-26 11:49:41,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-11-26 11:49:41,248 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:41,249 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:41,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 11:49:41,249 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:41,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:41,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1293007896, now seen corresponding path program 1 times [2023-11-26 11:49:41,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:41,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68087052] [2023-11-26 11:49:41,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:41,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:41,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:41,525 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:41,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:41,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68087052] [2023-11-26 11:49:41,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68087052] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:41,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:41,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:49:41,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030390532] [2023-11-26 11:49:41,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:41,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:49:41,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:41,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:49:41,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:49:41,529 INFO L87 Difference]: Start difference. First operand 411 states and 625 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 2 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:42,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:42,590 INFO L93 Difference]: Finished difference Result 1193 states and 1820 transitions. [2023-11-26 11:49:42,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:49:42,591 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 2 states have internal predecessors, (126), 0 states have call successors, (0), 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 126 [2023-11-26 11:49:42,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:42,597 INFO L225 Difference]: With dead ends: 1193 [2023-11-26 11:49:42,597 INFO L226 Difference]: Without dead ends: 783 [2023-11-26 11:49:42,599 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 [2023-11-26 11:49:42,600 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 175 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:42,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 152 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-26 11:49:42,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2023-11-26 11:49:42,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 783. [2023-11-26 11:49:42,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 782 states have (on average 1.3746803069053708) internal successors, (1075), 782 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:42,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 1075 transitions. [2023-11-26 11:49:42,640 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 1075 transitions. Word has length 126 [2023-11-26 11:49:42,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:42,640 INFO L495 AbstractCegarLoop]: Abstraction has 783 states and 1075 transitions. [2023-11-26 11:49:42,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 2 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:42,641 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 1075 transitions. [2023-11-26 11:49:42,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-11-26 11:49:42,648 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:42,648 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:42,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 11:49:42,649 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:42,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:42,650 INFO L85 PathProgramCache]: Analyzing trace with hash 350897778, now seen corresponding path program 1 times [2023-11-26 11:49:42,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:42,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735535469] [2023-11-26 11:49:42,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:42,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:42,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:43,234 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:43,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:43,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735535469] [2023-11-26 11:49:43,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735535469] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:43,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:43,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:49:43,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839757231] [2023-11-26 11:49:43,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:43,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:49:43,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:43,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:49:43,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:49:43,241 INFO L87 Difference]: Start difference. First operand 783 states and 1075 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 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) [2023-11-26 11:49:44,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:44,305 INFO L93 Difference]: Finished difference Result 1935 states and 2598 transitions. [2023-11-26 11:49:44,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:49:44,306 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 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 [2023-11-26 11:49:44,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:44,314 INFO L225 Difference]: With dead ends: 1935 [2023-11-26 11:49:44,314 INFO L226 Difference]: Without dead ends: 1153 [2023-11-26 11:49:44,316 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 [2023-11-26 11:49:44,318 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 119 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:44,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 188 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-26 11:49:44,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2023-11-26 11:49:44,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 1152. [2023-11-26 11:49:44,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 1151 states have (on average 1.2701998262380538) internal successors, (1462), 1151 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:44,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 1462 transitions. [2023-11-26 11:49:44,353 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 1462 transitions. Word has length 130 [2023-11-26 11:49:44,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:44,354 INFO L495 AbstractCegarLoop]: Abstraction has 1152 states and 1462 transitions. [2023-11-26 11:49:44,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 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) [2023-11-26 11:49:44,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 1462 transitions. [2023-11-26 11:49:44,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-11-26 11:49:44,359 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:44,360 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, 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] [2023-11-26 11:49:44,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 11:49:44,360 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:44,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:44,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1501765399, now seen corresponding path program 1 times [2023-11-26 11:49:44,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:44,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915155808] [2023-11-26 11:49:44,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:44,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:44,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:44,766 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:44,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:44,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915155808] [2023-11-26 11:49:44,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915155808] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:44,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:44,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:49:44,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305395023] [2023-11-26 11:49:44,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:44,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:49:44,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:44,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:49:44,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:49:44,775 INFO L87 Difference]: Start difference. First operand 1152 states and 1462 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:45,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:45,851 INFO L93 Difference]: Finished difference Result 2678 states and 3480 transitions. [2023-11-26 11:49:45,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:49:45,852 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 172 [2023-11-26 11:49:45,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:45,863 INFO L225 Difference]: With dead ends: 2678 [2023-11-26 11:49:45,863 INFO L226 Difference]: Without dead ends: 1711 [2023-11-26 11:49:45,865 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 [2023-11-26 11:49:45,866 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 145 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:45,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 329 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-26 11:49:45,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1711 states. [2023-11-26 11:49:45,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1711 to 1520. [2023-11-26 11:49:45,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1520 states, 1519 states have (on average 1.2560895325872283) internal successors, (1908), 1519 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:45,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1520 states to 1520 states and 1908 transitions. [2023-11-26 11:49:45,906 INFO L78 Accepts]: Start accepts. Automaton has 1520 states and 1908 transitions. Word has length 172 [2023-11-26 11:49:45,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:45,907 INFO L495 AbstractCegarLoop]: Abstraction has 1520 states and 1908 transitions. [2023-11-26 11:49:45,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:45,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1520 states and 1908 transitions. [2023-11-26 11:49:45,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2023-11-26 11:49:45,912 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:45,912 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, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:45,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 11:49:45,912 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:45,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:45,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1597798325, now seen corresponding path program 1 times [2023-11-26 11:49:45,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:45,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062898809] [2023-11-26 11:49:45,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:45,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:46,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:46,364 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-11-26 11:49:46,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:46,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062898809] [2023-11-26 11:49:46,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062898809] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:46,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:46,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:49:46,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343799644] [2023-11-26 11:49:46,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:46,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:49:46,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:46,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:49:46,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:49:46,367 INFO L87 Difference]: Start difference. First operand 1520 states and 1908 transitions. Second operand has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:47,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:47,412 INFO L93 Difference]: Finished difference Result 3969 states and 4985 transitions. [2023-11-26 11:49:47,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:49:47,413 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 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 242 [2023-11-26 11:49:47,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:47,428 INFO L225 Difference]: With dead ends: 3969 [2023-11-26 11:49:47,430 INFO L226 Difference]: Without dead ends: 2450 [2023-11-26 11:49:47,433 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 [2023-11-26 11:49:47,435 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 179 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:47,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 157 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-26 11:49:47,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2450 states. [2023-11-26 11:49:47,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2450 to 2449. [2023-11-26 11:49:47,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2449 states, 2448 states have (on average 1.2340686274509804) internal successors, (3021), 2448 states have internal predecessors, (3021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:47,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2449 states to 2449 states and 3021 transitions. [2023-11-26 11:49:47,504 INFO L78 Accepts]: Start accepts. Automaton has 2449 states and 3021 transitions. Word has length 242 [2023-11-26 11:49:47,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:47,511 INFO L495 AbstractCegarLoop]: Abstraction has 2449 states and 3021 transitions. [2023-11-26 11:49:47,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:47,512 INFO L276 IsEmpty]: Start isEmpty. Operand 2449 states and 3021 transitions. [2023-11-26 11:49:47,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2023-11-26 11:49:47,518 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:47,518 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, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:47,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 11:49:47,519 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:47,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:47,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1848088881, now seen corresponding path program 1 times [2023-11-26 11:49:47,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:47,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246365634] [2023-11-26 11:49:47,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:47,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:47,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:47,947 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-11-26 11:49:47,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:47,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246365634] [2023-11-26 11:49:47,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246365634] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:47,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:47,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:49:47,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552254371] [2023-11-26 11:49:47,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:47,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:49:47,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:47,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:49:47,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:49:47,951 INFO L87 Difference]: Start difference. First operand 2449 states and 3021 transitions. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:49,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:49,163 INFO L93 Difference]: Finished difference Result 5637 states and 7016 transitions. [2023-11-26 11:49:49,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:49:49,167 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 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 279 [2023-11-26 11:49:49,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:49,187 INFO L225 Difference]: With dead ends: 5637 [2023-11-26 11:49:49,188 INFO L226 Difference]: Without dead ends: 3189 [2023-11-26 11:49:49,191 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 [2023-11-26 11:49:49,193 INFO L413 NwaCegarLoop]: 354 mSDtfsCounter, 140 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:49,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 375 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-26 11:49:49,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3189 states. [2023-11-26 11:49:49,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3189 to 2629. [2023-11-26 11:49:49,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2629 states, 2628 states have (on average 1.22869101978691) internal successors, (3229), 2628 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:49,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2629 states to 2629 states and 3229 transitions. [2023-11-26 11:49:49,267 INFO L78 Accepts]: Start accepts. Automaton has 2629 states and 3229 transitions. Word has length 279 [2023-11-26 11:49:49,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:49,268 INFO L495 AbstractCegarLoop]: Abstraction has 2629 states and 3229 transitions. [2023-11-26 11:49:49,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:49,268 INFO L276 IsEmpty]: Start isEmpty. Operand 2629 states and 3229 transitions. [2023-11-26 11:49:49,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2023-11-26 11:49:49,276 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:49,276 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, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:49,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-26 11:49:49,277 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:49,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:49,277 INFO L85 PathProgramCache]: Analyzing trace with hash 796707962, now seen corresponding path program 1 times [2023-11-26 11:49:49,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:49,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419456193] [2023-11-26 11:49:49,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:49,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:49,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:49,768 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 241 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:49,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:49,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419456193] [2023-11-26 11:49:49,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419456193] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:49,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:49,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:49:49,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177764575] [2023-11-26 11:49:49,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:49,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:49:49,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:49,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:49:49,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:49:49,773 INFO L87 Difference]: Start difference. First operand 2629 states and 3229 transitions. Second operand has 4 states, 4 states have (on average 80.0) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:51,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:51,572 INFO L93 Difference]: Finished difference Result 8041 states and 9929 transitions. [2023-11-26 11:49:51,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:49:51,573 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 80.0) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 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 320 [2023-11-26 11:49:51,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:51,601 INFO L225 Difference]: With dead ends: 8041 [2023-11-26 11:49:51,601 INFO L226 Difference]: Without dead ends: 5413 [2023-11-26 11:49:51,606 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 [2023-11-26 11:49:51,607 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 257 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1066 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 1232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:51,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 79 Invalid, 1232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1066 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-26 11:49:51,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5413 states. [2023-11-26 11:49:51,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5413 to 5226. [2023-11-26 11:49:51,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5226 states, 5225 states have (on average 1.2086124401913876) internal successors, (6315), 5225 states have internal predecessors, (6315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:51,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5226 states to 5226 states and 6315 transitions. [2023-11-26 11:49:51,760 INFO L78 Accepts]: Start accepts. Automaton has 5226 states and 6315 transitions. Word has length 320 [2023-11-26 11:49:51,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:51,761 INFO L495 AbstractCegarLoop]: Abstraction has 5226 states and 6315 transitions. [2023-11-26 11:49:51,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.0) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:51,761 INFO L276 IsEmpty]: Start isEmpty. Operand 5226 states and 6315 transitions. [2023-11-26 11:49:51,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2023-11-26 11:49:51,773 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:51,774 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, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:51,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-26 11:49:51,774 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:51,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:51,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1974787430, now seen corresponding path program 1 times [2023-11-26 11:49:51,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:51,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545173414] [2023-11-26 11:49:51,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:51,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:51,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:52,106 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 278 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2023-11-26 11:49:52,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:52,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545173414] [2023-11-26 11:49:52,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545173414] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:52,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:52,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:49:52,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227157339] [2023-11-26 11:49:52,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:52,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:49:52,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:52,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:49:52,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:49:52,111 INFO L87 Difference]: Start difference. First operand 5226 states and 6315 transitions. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:53,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:53,127 INFO L93 Difference]: Finished difference Result 10080 states and 12246 transitions. [2023-11-26 11:49:53,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:49:53,131 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 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 366 [2023-11-26 11:49:53,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:53,156 INFO L225 Difference]: With dead ends: 10080 [2023-11-26 11:49:53,157 INFO L226 Difference]: Without dead ends: 5223 [2023-11-26 11:49:53,162 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 [2023-11-26 11:49:53,163 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 151 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:53,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 301 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-26 11:49:53,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5223 states. [2023-11-26 11:49:53,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5223 to 5222. [2023-11-26 11:49:53,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5222 states, 5221 states have (on average 1.1721892357785866) internal successors, (6120), 5221 states have internal predecessors, (6120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:53,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5222 states to 5222 states and 6120 transitions. [2023-11-26 11:49:53,278 INFO L78 Accepts]: Start accepts. Automaton has 5222 states and 6120 transitions. Word has length 366 [2023-11-26 11:49:53,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:53,279 INFO L495 AbstractCegarLoop]: Abstraction has 5222 states and 6120 transitions. [2023-11-26 11:49:53,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:53,280 INFO L276 IsEmpty]: Start isEmpty. Operand 5222 states and 6120 transitions. [2023-11-26 11:49:53,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2023-11-26 11:49:53,293 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:53,294 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, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-26 11:49:53,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-26 11:49:53,295 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:53,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:53,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1817375643, now seen corresponding path program 1 times [2023-11-26 11:49:53,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:53,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676342932] [2023-11-26 11:49:53,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:53,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:53,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:53,829 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 347 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-11-26 11:49:53,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:53,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676342932] [2023-11-26 11:49:53,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676342932] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:53,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:53,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:49:53,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716480466] [2023-11-26 11:49:53,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:53,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:49:53,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:53,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:49:53,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:49:53,834 INFO L87 Difference]: Start difference. First operand 5222 states and 6120 transitions. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:55,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:55,143 INFO L93 Difference]: Finished difference Result 11740 states and 13888 transitions. [2023-11-26 11:49:55,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:49:55,144 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 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 371 [2023-11-26 11:49:55,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:55,179 INFO L225 Difference]: With dead ends: 11740 [2023-11-26 11:49:55,179 INFO L226 Difference]: Without dead ends: 6887 [2023-11-26 11:49:55,184 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 [2023-11-26 11:49:55,185 INFO L413 NwaCegarLoop]: 333 mSDtfsCounter, 118 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:55,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 359 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-26 11:49:55,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6887 states. [2023-11-26 11:49:55,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6887 to 6699. [2023-11-26 11:49:55,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6699 states, 6698 states have (on average 1.1576590026873694) internal successors, (7754), 6698 states have internal predecessors, (7754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:55,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6699 states to 6699 states and 7754 transitions. [2023-11-26 11:49:55,336 INFO L78 Accepts]: Start accepts. Automaton has 6699 states and 7754 transitions. Word has length 371 [2023-11-26 11:49:55,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:55,337 INFO L495 AbstractCegarLoop]: Abstraction has 6699 states and 7754 transitions. [2023-11-26 11:49:55,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:55,337 INFO L276 IsEmpty]: Start isEmpty. Operand 6699 states and 7754 transitions. [2023-11-26 11:49:55,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2023-11-26 11:49:55,348 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:55,349 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, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-26 11:49:55,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-26 11:49:55,350 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:55,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:55,351 INFO L85 PathProgramCache]: Analyzing trace with hash -307645007, now seen corresponding path program 1 times [2023-11-26 11:49:55,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:55,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526001887] [2023-11-26 11:49:55,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:55,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:55,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:55,705 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 176 proven. 0 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2023-11-26 11:49:55,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:55,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526001887] [2023-11-26 11:49:55,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526001887] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:55,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:55,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:49:55,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306604864] [2023-11-26 11:49:55,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:55,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:49:55,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:55,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:49:55,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:49:55,708 INFO L87 Difference]: Start difference. First operand 6699 states and 7754 transitions. Second operand has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:56,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:56,805 INFO L93 Difference]: Finished difference Result 16526 states and 19322 transitions. [2023-11-26 11:49:56,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:49:56,806 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 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 385 [2023-11-26 11:49:56,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:56,827 INFO L225 Difference]: With dead ends: 16526 [2023-11-26 11:49:56,827 INFO L226 Difference]: Without dead ends: 10196 [2023-11-26 11:49:56,835 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 [2023-11-26 11:49:56,836 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 157 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:56,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 128 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-26 11:49:56,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10196 states. [2023-11-26 11:49:56,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10196 to 9826. [2023-11-26 11:49:56,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9826 states, 9825 states have (on average 1.1501272264631044) internal successors, (11300), 9825 states have internal predecessors, (11300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:57,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9826 states to 9826 states and 11300 transitions. [2023-11-26 11:49:57,011 INFO L78 Accepts]: Start accepts. Automaton has 9826 states and 11300 transitions. Word has length 385 [2023-11-26 11:49:57,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:57,012 INFO L495 AbstractCegarLoop]: Abstraction has 9826 states and 11300 transitions. [2023-11-26 11:49:57,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:57,012 INFO L276 IsEmpty]: Start isEmpty. Operand 9826 states and 11300 transitions. [2023-11-26 11:49:57,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2023-11-26 11:49:57,027 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:57,027 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, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-26 11:49:57,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-26 11:49:57,028 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:57,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:57,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1185768682, now seen corresponding path program 1 times [2023-11-26 11:49:57,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:57,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648270250] [2023-11-26 11:49:57,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:57,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:57,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:57,571 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 429 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-11-26 11:49:57,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:57,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648270250] [2023-11-26 11:49:57,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648270250] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:57,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:57,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:49:57,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127261989] [2023-11-26 11:49:57,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:57,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:49:57,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:57,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:49:57,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:49:57,574 INFO L87 Difference]: Start difference. First operand 9826 states and 11300 transitions. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:58,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:58,800 INFO L93 Difference]: Finished difference Result 21124 states and 24423 transitions. [2023-11-26 11:49:58,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:49:58,801 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 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 400 [2023-11-26 11:49:58,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:58,823 INFO L225 Difference]: With dead ends: 21124 [2023-11-26 11:49:58,823 INFO L226 Difference]: Without dead ends: 11667 [2023-11-26 11:49:58,832 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 [2023-11-26 11:49:58,833 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 129 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:58,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 75 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-26 11:49:58,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11667 states. [2023-11-26 11:49:58,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11667 to 11294. [2023-11-26 11:49:59,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11294 states, 11293 states have (on average 1.1512441335340475) internal successors, (13001), 11293 states have internal predecessors, (13001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:59,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11294 states to 11294 states and 13001 transitions. [2023-11-26 11:49:59,039 INFO L78 Accepts]: Start accepts. Automaton has 11294 states and 13001 transitions. Word has length 400 [2023-11-26 11:49:59,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:59,040 INFO L495 AbstractCegarLoop]: Abstraction has 11294 states and 13001 transitions. [2023-11-26 11:49:59,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:59,041 INFO L276 IsEmpty]: Start isEmpty. Operand 11294 states and 13001 transitions. [2023-11-26 11:49:59,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2023-11-26 11:49:59,054 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:59,055 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, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-26 11:49:59,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-26 11:49:59,055 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:59,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:59,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1624432320, now seen corresponding path program 1 times [2023-11-26 11:49:59,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:59,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651888125] [2023-11-26 11:49:59,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:59,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:59,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:00,304 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 490 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:00,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:00,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651888125] [2023-11-26 11:50:00,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651888125] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:00,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:00,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:50:00,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984056562] [2023-11-26 11:50:00,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:00,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:50:00,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:00,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:50:00,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:50:00,308 INFO L87 Difference]: Start difference. First operand 11294 states and 13001 transitions. Second operand has 4 states, 4 states have (on average 100.25) internal successors, (401), 4 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:02,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:02,011 INFO L93 Difference]: Finished difference Result 26117 states and 30098 transitions. [2023-11-26 11:50:02,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:50:02,012 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 100.25) internal successors, (401), 4 states have internal predecessors, (401), 0 states have call successors, (0), 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 401 [2023-11-26 11:50:02,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:02,038 INFO L225 Difference]: With dead ends: 26117 [2023-11-26 11:50:02,039 INFO L226 Difference]: Without dead ends: 15192 [2023-11-26 11:50:02,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:50:02,053 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 190 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1174 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 1257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:02,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 168 Invalid, 1257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1174 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-26 11:50:02,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15192 states. [2023-11-26 11:50:02,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15192 to 13712. [2023-11-26 11:50:02,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13712 states, 13711 states have (on average 1.1468893589089053) internal successors, (15725), 13711 states have internal predecessors, (15725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:02,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13712 states to 13712 states and 15725 transitions. [2023-11-26 11:50:02,307 INFO L78 Accepts]: Start accepts. Automaton has 13712 states and 15725 transitions. Word has length 401 [2023-11-26 11:50:02,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:02,308 INFO L495 AbstractCegarLoop]: Abstraction has 13712 states and 15725 transitions. [2023-11-26 11:50:02,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 100.25) internal successors, (401), 4 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:02,309 INFO L276 IsEmpty]: Start isEmpty. Operand 13712 states and 15725 transitions. [2023-11-26 11:50:02,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2023-11-26 11:50:02,326 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:02,327 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, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-26 11:50:02,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-26 11:50:02,327 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:50:02,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:02,328 INFO L85 PathProgramCache]: Analyzing trace with hash 673571335, now seen corresponding path program 1 times [2023-11-26 11:50:02,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:02,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641453807] [2023-11-26 11:50:02,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:02,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:02,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:03,106 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 176 proven. 203 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-11-26 11:50:03,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:03,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641453807] [2023-11-26 11:50:03,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641453807] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:03,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603121963] [2023-11-26 11:50:03,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:03,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:03,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995f8147-f8e4-42ba-89ea-8e7bfcd92217/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:03,113 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995f8147-f8e4-42ba-89ea-8e7bfcd92217/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:03,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995f8147-f8e4-42ba-89ea-8e7bfcd92217/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:50:03,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:03,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:50:03,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:03,847 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 441 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-11-26 11:50:03,849 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:50:03,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603121963] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:03,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:50:03,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-11-26 11:50:03,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817738115] [2023-11-26 11:50:03,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:03,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:50:03,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:03,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:50:03,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:50:03,853 INFO L87 Difference]: Start difference. First operand 13712 states and 15725 transitions. Second operand has 4 states, 4 states have (on average 88.25) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:05,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:05,749 INFO L93 Difference]: Finished difference Result 32406 states and 37377 transitions. [2023-11-26 11:50:05,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:50:05,750 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 88.25) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 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 411 [2023-11-26 11:50:05,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:05,781 INFO L225 Difference]: With dead ends: 32406 [2023-11-26 11:50:05,782 INFO L226 Difference]: Without dead ends: 19063 [2023-11-26 11:50:05,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 409 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:50:05,798 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 202 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:05,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 107 Invalid, 1354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 1043 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-26 11:50:05,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19063 states. [2023-11-26 11:50:06,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19063 to 19051. [2023-11-26 11:50:06,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19051 states, 19050 states have (on average 1.1395275590551182) internal successors, (21708), 19050 states have internal predecessors, (21708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:06,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19051 states to 19051 states and 21708 transitions. [2023-11-26 11:50:06,097 INFO L78 Accepts]: Start accepts. Automaton has 19051 states and 21708 transitions. Word has length 411 [2023-11-26 11:50:06,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:06,097 INFO L495 AbstractCegarLoop]: Abstraction has 19051 states and 21708 transitions. [2023-11-26 11:50:06,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 88.25) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:06,098 INFO L276 IsEmpty]: Start isEmpty. Operand 19051 states and 21708 transitions. [2023-11-26 11:50:06,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2023-11-26 11:50:06,130 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:06,130 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:06,145 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995f8147-f8e4-42ba-89ea-8e7bfcd92217/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-26 11:50:06,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995f8147-f8e4-42ba-89ea-8e7bfcd92217/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:06,337 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:50:06,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:06,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1601492279, now seen corresponding path program 1 times [2023-11-26 11:50:06,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:06,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435633033] [2023-11-26 11:50:06,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:06,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:06,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:06,978 INFO L134 CoverageAnalysis]: Checked inductivity of 804 backedges. 461 proven. 0 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2023-11-26 11:50:06,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:06,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435633033] [2023-11-26 11:50:06,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435633033] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:06,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:06,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:50:06,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390032877] [2023-11-26 11:50:06,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:06,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:50:06,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:06,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:50:06,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:50:06,984 INFO L87 Difference]: Start difference. First operand 19051 states and 21708 transitions. Second operand has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:08,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:08,158 INFO L93 Difference]: Finished difference Result 39572 states and 45096 transitions. [2023-11-26 11:50:08,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:50:08,158 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 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 499 [2023-11-26 11:50:08,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:08,181 INFO L225 Difference]: With dead ends: 39572 [2023-11-26 11:50:08,181 INFO L226 Difference]: Without dead ends: 19046 [2023-11-26 11:50:08,194 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 [2023-11-26 11:50:08,195 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 196 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:08,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 357 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-26 11:50:08,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19046 states. [2023-11-26 11:50:08,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19046 to 18302. [2023-11-26 11:50:08,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18302 states, 18301 states have (on average 1.1157313807988634) internal successors, (20419), 18301 states have internal predecessors, (20419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:08,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18302 states to 18302 states and 20419 transitions. [2023-11-26 11:50:08,600 INFO L78 Accepts]: Start accepts. Automaton has 18302 states and 20419 transitions. Word has length 499 [2023-11-26 11:50:08,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:08,601 INFO L495 AbstractCegarLoop]: Abstraction has 18302 states and 20419 transitions. [2023-11-26 11:50:08,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:08,601 INFO L276 IsEmpty]: Start isEmpty. Operand 18302 states and 20419 transitions. [2023-11-26 11:50:08,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2023-11-26 11:50:08,626 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:08,627 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 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] [2023-11-26 11:50:08,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-26 11:50:08,627 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:50:08,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:08,628 INFO L85 PathProgramCache]: Analyzing trace with hash 946498037, now seen corresponding path program 1 times [2023-11-26 11:50:08,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:08,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789551112] [2023-11-26 11:50:08,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:08,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:08,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:09,754 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 447 proven. 85 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2023-11-26 11:50:09,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:09,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789551112] [2023-11-26 11:50:09,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789551112] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:09,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536490972] [2023-11-26 11:50:09,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:09,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:09,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995f8147-f8e4-42ba-89ea-8e7bfcd92217/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:09,758 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995f8147-f8e4-42ba-89ea-8e7bfcd92217/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:09,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995f8147-f8e4-42ba-89ea-8e7bfcd92217/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:50:10,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:10,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:50:10,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:10,452 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 532 proven. 0 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2023-11-26 11:50:10,452 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:50:10,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536490972] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:10,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:50:10,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-11-26 11:50:10,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902086304] [2023-11-26 11:50:10,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:10,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:50:10,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:10,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:50:10,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:50:10,456 INFO L87 Difference]: Start difference. First operand 18302 states and 20419 transitions. Second operand has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:11,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:11,472 INFO L93 Difference]: Finished difference Result 37161 states and 41450 transitions. [2023-11-26 11:50:11,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:50:11,473 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 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 506 [2023-11-26 11:50:11,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:11,493 INFO L225 Difference]: With dead ends: 37161 [2023-11-26 11:50:11,493 INFO L226 Difference]: Without dead ends: 19228 [2023-11-26 11:50:11,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 505 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:50:11,503 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 82 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:11,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 160 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-26 11:50:11,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19228 states. [2023-11-26 11:50:11,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19228 to 18854. [2023-11-26 11:50:11,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18854 states, 18853 states have (on average 1.1102742269134886) internal successors, (20932), 18853 states have internal predecessors, (20932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:11,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18854 states to 18854 states and 20932 transitions. [2023-11-26 11:50:11,781 INFO L78 Accepts]: Start accepts. Automaton has 18854 states and 20932 transitions. Word has length 506 [2023-11-26 11:50:11,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:11,782 INFO L495 AbstractCegarLoop]: Abstraction has 18854 states and 20932 transitions. [2023-11-26 11:50:11,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:11,783 INFO L276 IsEmpty]: Start isEmpty. Operand 18854 states and 20932 transitions. [2023-11-26 11:50:11,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2023-11-26 11:50:11,801 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:11,802 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 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] [2023-11-26 11:50:11,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995f8147-f8e4-42ba-89ea-8e7bfcd92217/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:12,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995f8147-f8e4-42ba-89ea-8e7bfcd92217/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-26 11:50:12,008 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:50:12,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:12,009 INFO L85 PathProgramCache]: Analyzing trace with hash -594032100, now seen corresponding path program 1 times [2023-11-26 11:50:12,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:12,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445585420] [2023-11-26 11:50:12,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:12,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:12,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:13,270 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 508 proven. 24 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2023-11-26 11:50:13,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:13,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445585420] [2023-11-26 11:50:13,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445585420] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:13,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324379213] [2023-11-26 11:50:13,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:13,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:13,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995f8147-f8e4-42ba-89ea-8e7bfcd92217/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:13,274 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995f8147-f8e4-42ba-89ea-8e7bfcd92217/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:13,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995f8147-f8e4-42ba-89ea-8e7bfcd92217/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:50:13,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:13,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:50:13,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:13,887 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 532 proven. 0 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2023-11-26 11:50:13,887 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:50:13,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324379213] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:13,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:50:13,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2023-11-26 11:50:13,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274418458] [2023-11-26 11:50:13,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:13,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:50:13,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:13,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:50:13,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:50:13,891 INFO L87 Difference]: Start difference. First operand 18854 states and 20932 transitions. Second operand has 4 states, 4 states have (on average 76.5) internal successors, (306), 4 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:15,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:15,369 INFO L93 Difference]: Finished difference Result 39729 states and 44006 transitions. [2023-11-26 11:50:15,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:50:15,370 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 76.5) internal successors, (306), 4 states have internal predecessors, (306), 0 states have call successors, (0), 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 507 [2023-11-26 11:50:15,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:15,391 INFO L225 Difference]: With dead ends: 39729 [2023-11-26 11:50:15,391 INFO L226 Difference]: Without dead ends: 21244 [2023-11-26 11:50:15,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 505 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:50:15,401 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 274 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1061 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:15,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 173 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1061 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-26 11:50:15,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21244 states. [2023-11-26 11:50:15,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21244 to 18108. [2023-11-26 11:50:15,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18108 states, 18107 states have (on average 1.1062020213177224) internal successors, (20030), 18107 states have internal predecessors, (20030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:15,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18108 states to 18108 states and 20030 transitions. [2023-11-26 11:50:15,686 INFO L78 Accepts]: Start accepts. Automaton has 18108 states and 20030 transitions. Word has length 507 [2023-11-26 11:50:15,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:15,686 INFO L495 AbstractCegarLoop]: Abstraction has 18108 states and 20030 transitions. [2023-11-26 11:50:15,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 76.5) internal successors, (306), 4 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:15,687 INFO L276 IsEmpty]: Start isEmpty. Operand 18108 states and 20030 transitions. [2023-11-26 11:50:15,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2023-11-26 11:50:15,704 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:15,704 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2023-11-26 11:50:15,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995f8147-f8e4-42ba-89ea-8e7bfcd92217/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:15,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995f8147-f8e4-42ba-89ea-8e7bfcd92217/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:15,910 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:50:15,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:15,911 INFO L85 PathProgramCache]: Analyzing trace with hash 537179088, now seen corresponding path program 1 times [2023-11-26 11:50:15,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:15,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68789239] [2023-11-26 11:50:15,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:15,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:16,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat