./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem12_label48.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9e24f0-9e18-40d4-9ae8-fa1ba0acaabc/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9e24f0-9e18-40d4-9ae8-fa1ba0acaabc/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9e24f0-9e18-40d4-9ae8-fa1ba0acaabc/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9e24f0-9e18-40d4-9ae8-fa1ba0acaabc/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem12_label48.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9e24f0-9e18-40d4-9ae8-fa1ba0acaabc/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9e24f0-9e18-40d4-9ae8-fa1ba0acaabc/bin/uautomizer-verify-zZY32mL2XJ --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 6abe6deda42e5cd6457f2c2e337625778fbe4d0886f20421ed4af9df8a9f44a2 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 22:33:38,509 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 22:33:38,658 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9e24f0-9e18-40d4-9ae8-fa1ba0acaabc/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-23 22:33:38,666 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 22:33:38,667 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 22:33:38,695 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 22:33:38,695 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 22:33:38,696 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 22:33:38,697 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 22:33:38,698 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 22:33:38,698 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 22:33:38,699 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 22:33:38,700 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 22:33:38,701 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 22:33:38,701 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 22:33:38,702 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 22:33:38,703 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 22:33:38,703 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 22:33:38,704 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 22:33:38,705 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 22:33:38,705 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 22:33:38,706 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 22:33:38,707 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 22:33:38,707 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 22:33:38,708 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 22:33:38,709 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 22:33:38,709 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 22:33:38,710 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 22:33:38,710 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 22:33:38,711 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 22:33:38,711 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 22:33:38,712 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:33:38,712 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 22:33:38,713 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 22:33:38,713 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 22:33:38,713 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 22:33:38,714 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 22:33:38,714 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 22:33:38,714 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 22:33:38,714 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 22:33:38,715 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 22:33:38,715 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 22:33:38,715 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_3c9e24f0-9e18-40d4-9ae8-fa1ba0acaabc/bin/uautomizer-verify-zZY32mL2XJ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9e24f0-9e18-40d4-9ae8-fa1ba0acaabc/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6abe6deda42e5cd6457f2c2e337625778fbe4d0886f20421ed4af9df8a9f44a2 [2023-11-23 22:33:39,081 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 22:33:39,113 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 22:33:39,116 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 22:33:39,118 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 22:33:39,118 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 22:33:39,119 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9e24f0-9e18-40d4-9ae8-fa1ba0acaabc/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/eca-rers2012/Problem12_label48.c [2023-11-23 22:33:42,300 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 22:33:42,870 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 22:33:42,871 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9e24f0-9e18-40d4-9ae8-fa1ba0acaabc/sv-benchmarks/c/eca-rers2012/Problem12_label48.c [2023-11-23 22:33:42,913 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9e24f0-9e18-40d4-9ae8-fa1ba0acaabc/bin/uautomizer-verify-zZY32mL2XJ/data/30f67a9bf/849e5e00dc5b47d8b56a8cbd195a0896/FLAG7b426568d [2023-11-23 22:33:42,932 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9e24f0-9e18-40d4-9ae8-fa1ba0acaabc/bin/uautomizer-verify-zZY32mL2XJ/data/30f67a9bf/849e5e00dc5b47d8b56a8cbd195a0896 [2023-11-23 22:33:42,939 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 22:33:42,940 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 22:33:42,942 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 22:33:42,942 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 22:33:42,948 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 22:33:42,950 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:33:42" (1/1) ... [2023-11-23 22:33:42,952 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2276fbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:33:42, skipping insertion in model container [2023-11-23 22:33:42,952 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:33:42" (1/1) ... [2023-11-23 22:33:43,109 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 22:33:43,377 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_3c9e24f0-9e18-40d4-9ae8-fa1ba0acaabc/sv-benchmarks/c/eca-rers2012/Problem12_label48.c[1668,1681] [2023-11-23 22:33:44,555 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:33:44,567 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 22:33:44,594 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_3c9e24f0-9e18-40d4-9ae8-fa1ba0acaabc/sv-benchmarks/c/eca-rers2012/Problem12_label48.c[1668,1681] [2023-11-23 22:33:45,175 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:33:45,205 INFO L206 MainTranslator]: Completed translation [2023-11-23 22:33:45,206 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:33:45 WrapperNode [2023-11-23 22:33:45,207 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 22:33:45,208 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 22:33:45,208 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 22:33:45,208 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 22:33:45,217 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:33:45" (1/1) ... [2023-11-23 22:33:45,283 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:33:45" (1/1) ... [2023-11-23 22:33:45,755 INFO L138 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4758 [2023-11-23 22:33:45,756 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 22:33:45,756 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 22:33:45,757 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 22:33:45,757 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 22:33:45,837 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:33:45" (1/1) ... [2023-11-23 22:33:45,859 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:33:45" (1/1) ... [2023-11-23 22:33:45,962 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:33:45" (1/1) ... [2023-11-23 22:33:46,217 INFO L189 HeapSplitter]: Split 2 memory accesses to 1 slices as follows [2] [2023-11-23 22:33:46,218 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:33:45" (1/1) ... [2023-11-23 22:33:46,218 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:33:45" (1/1) ... [2023-11-23 22:33:46,390 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:33:45" (1/1) ... [2023-11-23 22:33:46,428 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:33:45" (1/1) ... [2023-11-23 22:33:46,445 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:33:45" (1/1) ... [2023-11-23 22:33:46,463 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:33:45" (1/1) ... [2023-11-23 22:33:46,581 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 22:33:46,585 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 22:33:46,585 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 22:33:46,586 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 22:33:46,587 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:33:45" (1/1) ... [2023-11-23 22:33:46,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:33:46,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9e24f0-9e18-40d4-9ae8-fa1ba0acaabc/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:33:46,625 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9e24f0-9e18-40d4-9ae8-fa1ba0acaabc/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 22:33:46,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9e24f0-9e18-40d4-9ae8-fa1ba0acaabc/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 22:33:46,670 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 22:33:46,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 22:33:46,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 22:33:46,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 22:33:46,745 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 22:33:46,748 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 22:33:51,993 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 22:33:52,065 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 22:33:52,067 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 22:33:52,069 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:33:52 BoogieIcfgContainer [2023-11-23 22:33:52,069 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 22:33:52,071 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 22:33:52,072 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 22:33:52,075 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 22:33:52,076 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:33:42" (1/3) ... [2023-11-23 22:33:52,078 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d39a691 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:33:52, skipping insertion in model container [2023-11-23 22:33:52,078 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:33:45" (2/3) ... [2023-11-23 22:33:52,078 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d39a691 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:33:52, skipping insertion in model container [2023-11-23 22:33:52,079 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:33:52" (3/3) ... [2023-11-23 22:33:52,080 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label48.c [2023-11-23 22:33:52,101 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 22:33:52,102 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 22:33:52,192 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:33:52,200 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;@58f96d95, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:33:52,200 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 22:33:52,211 INFO L276 IsEmpty]: Start isEmpty. Operand has 756 states, 754 states have (on average 1.993368700265252) internal successors, (1503), 755 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:52,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-23 22:33:52,219 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:33:52,220 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:33:52,221 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:33:52,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:33:52,230 INFO L85 PathProgramCache]: Analyzing trace with hash 902928907, now seen corresponding path program 1 times [2023-11-23 22:33:52,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:33:52,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771540469] [2023-11-23 22:33:52,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:52,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:33:52,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:33:52,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:33:52,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:33:52,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771540469] [2023-11-23 22:33:52,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771540469] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:33:52,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:33:52,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:33:52,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242647529] [2023-11-23 22:33:52,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:33:52,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 22:33:52,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:33:52,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 22:33:52,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 22:33:52,489 INFO L87 Difference]: Start difference. First operand has 756 states, 754 states have (on average 1.993368700265252) internal successors, (1503), 755 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:52,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:33:52,623 INFO L93 Difference]: Finished difference Result 1511 states and 3005 transitions. [2023-11-23 22:33:52,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 22:33:52,626 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2023-11-23 22:33:52,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:33:52,653 INFO L225 Difference]: With dead ends: 1511 [2023-11-23 22:33:52,653 INFO L226 Difference]: Without dead ends: 754 [2023-11-23 22:33:52,662 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 [2023-11-23 22:33:52,666 INFO L413 NwaCegarLoop]: 1438 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1438 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 22:33:52,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1438 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 22:33:52,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2023-11-23 22:33:52,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 754. [2023-11-23 22:33:52,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 1.9096945551128819) internal successors, (1438), 753 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:52,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1438 transitions. [2023-11-23 22:33:52,759 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1438 transitions. Word has length 9 [2023-11-23 22:33:52,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:33:52,760 INFO L495 AbstractCegarLoop]: Abstraction has 754 states and 1438 transitions. [2023-11-23 22:33:52,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:52,761 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1438 transitions. [2023-11-23 22:33:52,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-23 22:33:52,761 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:33:52,761 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:33:52,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 22:33:52,762 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:33:52,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:33:52,766 INFO L85 PathProgramCache]: Analyzing trace with hash 995675993, now seen corresponding path program 1 times [2023-11-23 22:33:52,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:33:52,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334991273] [2023-11-23 22:33:52,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:52,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:33:52,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:33:52,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:33:52,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:33:52,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334991273] [2023-11-23 22:33:52,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334991273] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:33:52,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:33:52,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:33:52,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165703050] [2023-11-23 22:33:52,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:33:52,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:33:52,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:33:52,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:33:52,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:33:52,906 INFO L87 Difference]: Start difference. First operand 754 states and 1438 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:57,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:33:57,303 INFO L93 Difference]: Finished difference Result 2258 states and 4311 transitions. [2023-11-23 22:33:57,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:33:57,304 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2023-11-23 22:33:57,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:33:57,314 INFO L225 Difference]: With dead ends: 2258 [2023-11-23 22:33:57,314 INFO L226 Difference]: Without dead ends: 1505 [2023-11-23 22:33:57,316 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 [2023-11-23 22:33:57,317 INFO L413 NwaCegarLoop]: 419 mSDtfsCounter, 808 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2275 mSolverCounterSat, 591 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 808 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 2866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 591 IncrementalHoareTripleChecker+Valid, 2275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-11-23 22:33:57,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [808 Valid, 426 Invalid, 2866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [591 Valid, 2275 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-11-23 22:33:57,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1505 states. [2023-11-23 22:33:57,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1505 to 1505. [2023-11-23 22:33:57,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1505 states, 1504 states have (on average 1.6389627659574468) internal successors, (2465), 1504 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:57,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 2465 transitions. [2023-11-23 22:33:57,381 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 2465 transitions. Word has length 9 [2023-11-23 22:33:57,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:33:57,382 INFO L495 AbstractCegarLoop]: Abstraction has 1505 states and 2465 transitions. [2023-11-23 22:33:57,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:33:57,382 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 2465 transitions. [2023-11-23 22:33:57,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-11-23 22:33:57,385 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:33:57,386 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 22:33:57,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 22:33:57,386 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:33:57,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:33:57,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1239332906, now seen corresponding path program 1 times [2023-11-23 22:33:57,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:33:57,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560696295] [2023-11-23 22:33:57,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:57,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:33:57,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:33:57,943 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:33:57,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:33:57,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560696295] [2023-11-23 22:33:57,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560696295] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:33:57,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566153134] [2023-11-23 22:33:57,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:33:57,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:33:57,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9e24f0-9e18-40d4-9ae8-fa1ba0acaabc/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:33:57,947 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9e24f0-9e18-40d4-9ae8-fa1ba0acaabc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:33:57,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9e24f0-9e18-40d4-9ae8-fa1ba0acaabc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 22:33:58,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:33:58,062 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 22:33:58,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:33:58,105 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:33:58,106 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:33:58,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566153134] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:33:58,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 22:33:58,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-11-23 22:33:58,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139323227] [2023-11-23 22:33:58,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:33:58,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:33:58,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:33:58,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:33:58,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:33:58,112 INFO L87 Difference]: Start difference. First operand 1505 states and 2465 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:34:02,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:34:02,753 INFO L93 Difference]: Finished difference Result 4511 states and 7392 transitions. [2023-11-23 22:34:02,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:34:02,755 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 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 80 [2023-11-23 22:34:02,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:34:02,776 INFO L225 Difference]: With dead ends: 4511 [2023-11-23 22:34:02,776 INFO L226 Difference]: Without dead ends: 3007 [2023-11-23 22:34:02,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:34:02,791 INFO L413 NwaCegarLoop]: 1381 mSDtfsCounter, 769 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1983 mSolverCounterSat, 885 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 769 SdHoareTripleChecker+Valid, 1388 SdHoareTripleChecker+Invalid, 2868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 885 IncrementalHoareTripleChecker+Valid, 1983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-11-23 22:34:02,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [769 Valid, 1388 Invalid, 2868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [885 Valid, 1983 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2023-11-23 22:34:02,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3007 states. [2023-11-23 22:34:02,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3007 to 3007. [2023-11-23 22:34:02,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3007 states, 3006 states have (on average 1.363606121091151) internal successors, (4099), 3006 states have internal predecessors, (4099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:34:02,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3007 states to 3007 states and 4099 transitions. [2023-11-23 22:34:02,910 INFO L78 Accepts]: Start accepts. Automaton has 3007 states and 4099 transitions. Word has length 80 [2023-11-23 22:34:02,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:34:02,912 INFO L495 AbstractCegarLoop]: Abstraction has 3007 states and 4099 transitions. [2023-11-23 22:34:02,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:34:02,912 INFO L276 IsEmpty]: Start isEmpty. Operand 3007 states and 4099 transitions. [2023-11-23 22:34:02,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-23 22:34:02,917 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:02,918 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:34:02,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9e24f0-9e18-40d4-9ae8-fa1ba0acaabc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 22:34:03,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9e24f0-9e18-40d4-9ae8-fa1ba0acaabc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-23 22:34:03,132 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:03,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:03,132 INFO L85 PathProgramCache]: Analyzing trace with hash -813283492, now seen corresponding path program 1 times [2023-11-23 22:34:03,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:03,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051884916] [2023-11-23 22:34:03,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:03,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:03,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:03,436 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:34:03,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:03,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051884916] [2023-11-23 22:34:03,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051884916] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:34:03,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:34:03,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:34:03,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108928410] [2023-11-23 22:34:03,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:34:03,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:34:03,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:03,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:34:03,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:34:03,444 INFO L87 Difference]: Start difference. First operand 3007 states and 4099 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:34:07,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:34:07,554 INFO L93 Difference]: Finished difference Result 7515 states and 10660 transitions. [2023-11-23 22:34:07,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:34:07,555 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 0 states have call successors, (0), 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 83 [2023-11-23 22:34:07,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:34:07,581 INFO L225 Difference]: With dead ends: 7515 [2023-11-23 22:34:07,581 INFO L226 Difference]: Without dead ends: 4509 [2023-11-23 22:34:07,585 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 [2023-11-23 22:34:07,587 INFO L413 NwaCegarLoop]: 512 mSDtfsCounter, 748 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2017 mSolverCounterSat, 910 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 748 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 2927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 910 IncrementalHoareTripleChecker+Valid, 2017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-11-23 22:34:07,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [748 Valid, 518 Invalid, 2927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [910 Valid, 2017 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-11-23 22:34:07,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4509 states. [2023-11-23 22:34:07,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4509 to 4509. [2023-11-23 22:34:07,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4509 states, 4508 states have (on average 1.3251996450754215) internal successors, (5974), 4508 states have internal predecessors, (5974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:34:07,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4509 states to 4509 states and 5974 transitions. [2023-11-23 22:34:07,693 INFO L78 Accepts]: Start accepts. Automaton has 4509 states and 5974 transitions. Word has length 83 [2023-11-23 22:34:07,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:34:07,694 INFO L495 AbstractCegarLoop]: Abstraction has 4509 states and 5974 transitions. [2023-11-23 22:34:07,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:34:07,694 INFO L276 IsEmpty]: Start isEmpty. Operand 4509 states and 5974 transitions. [2023-11-23 22:34:07,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-23 22:34:07,702 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:07,702 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:34:07,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 22:34:07,703 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:07,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:07,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1802311801, now seen corresponding path program 1 times [2023-11-23 22:34:07,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:07,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336858559] [2023-11-23 22:34:07,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:07,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:07,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:08,064 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:34:08,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:08,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336858559] [2023-11-23 22:34:08,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336858559] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:34:08,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:34:08,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:34:08,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939606436] [2023-11-23 22:34:08,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:34:08,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:34:08,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:08,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:34:08,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:34:08,069 INFO L87 Difference]: Start difference. First operand 4509 states and 5974 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:34:13,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:34:13,760 INFO L93 Difference]: Finished difference Result 14274 states and 18790 transitions. [2023-11-23 22:34:13,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:34:13,761 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 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 94 [2023-11-23 22:34:13,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:34:13,810 INFO L225 Difference]: With dead ends: 14274 [2023-11-23 22:34:13,810 INFO L226 Difference]: Without dead ends: 9766 [2023-11-23 22:34:13,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:34:13,819 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 2161 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 4750 mSolverCounterSat, 778 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2161 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 5528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 778 IncrementalHoareTripleChecker+Valid, 4750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2023-11-23 22:34:13,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2161 Valid, 183 Invalid, 5528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [778 Valid, 4750 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2023-11-23 22:34:13,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9766 states. [2023-11-23 22:34:13,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9766 to 9015. [2023-11-23 22:34:14,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9015 states, 9014 states have (on average 1.3039715997337475) internal successors, (11754), 9014 states have internal predecessors, (11754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:34:14,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9015 states to 9015 states and 11754 transitions. [2023-11-23 22:34:14,036 INFO L78 Accepts]: Start accepts. Automaton has 9015 states and 11754 transitions. Word has length 94 [2023-11-23 22:34:14,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:34:14,036 INFO L495 AbstractCegarLoop]: Abstraction has 9015 states and 11754 transitions. [2023-11-23 22:34:14,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:34:14,037 INFO L276 IsEmpty]: Start isEmpty. Operand 9015 states and 11754 transitions. [2023-11-23 22:34:14,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-11-23 22:34:14,039 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:14,039 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:34:14,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 22:34:14,040 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:14,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:14,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1274828124, now seen corresponding path program 1 times [2023-11-23 22:34:14,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:14,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549271029] [2023-11-23 22:34:14,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:14,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:14,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:14,428 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:34:14,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:14,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549271029] [2023-11-23 22:34:14,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549271029] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:34:14,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:34:14,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:34:14,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028713085] [2023-11-23 22:34:14,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:34:14,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:34:14,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:14,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:34:14,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:34:14,439 INFO L87 Difference]: Start difference. First operand 9015 states and 11754 transitions. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:34:19,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:34:19,332 INFO L93 Difference]: Finished difference Result 22574 states and 30208 transitions. [2023-11-23 22:34:19,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:34:19,334 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 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 148 [2023-11-23 22:34:19,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:34:19,379 INFO L225 Difference]: With dead ends: 22574 [2023-11-23 22:34:19,380 INFO L226 Difference]: Without dead ends: 12772 [2023-11-23 22:34:19,393 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 [2023-11-23 22:34:19,394 INFO L413 NwaCegarLoop]: 693 mSDtfsCounter, 690 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 3807 mSolverCounterSat, 663 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 4470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 663 IncrementalHoareTripleChecker+Valid, 3807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-11-23 22:34:19,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [690 Valid, 711 Invalid, 4470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [663 Valid, 3807 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2023-11-23 22:34:19,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12772 states. [2023-11-23 22:34:19,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12772 to 12770. [2023-11-23 22:34:19,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12770 states, 12769 states have (on average 1.2174015193045657) internal successors, (15545), 12769 states have internal predecessors, (15545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:34:19,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12770 states to 12770 states and 15545 transitions. [2023-11-23 22:34:19,651 INFO L78 Accepts]: Start accepts. Automaton has 12770 states and 15545 transitions. Word has length 148 [2023-11-23 22:34:19,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:34:19,652 INFO L495 AbstractCegarLoop]: Abstraction has 12770 states and 15545 transitions. [2023-11-23 22:34:19,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:34:19,652 INFO L276 IsEmpty]: Start isEmpty. Operand 12770 states and 15545 transitions. [2023-11-23 22:34:19,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2023-11-23 22:34:19,655 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:19,656 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:34:19,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 22:34:19,656 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:19,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:19,657 INFO L85 PathProgramCache]: Analyzing trace with hash -447595537, now seen corresponding path program 1 times [2023-11-23 22:34:19,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:19,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26740909] [2023-11-23 22:34:19,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:19,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:19,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:20,292 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 41 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:34:20,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:20,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26740909] [2023-11-23 22:34:20,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26740909] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:34:20,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528859957] [2023-11-23 22:34:20,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:20,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:20,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9e24f0-9e18-40d4-9ae8-fa1ba0acaabc/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:34:20,298 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9e24f0-9e18-40d4-9ae8-fa1ba0acaabc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:34:20,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9e24f0-9e18-40d4-9ae8-fa1ba0acaabc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 22:34:20,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:20,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 22:34:20,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:34:20,544 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-11-23 22:34:20,544 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:34:20,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528859957] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:34:20,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 22:34:20,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-23 22:34:20,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196029697] [2023-11-23 22:34:20,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:34:20,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:34:20,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:20,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:34:20,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:34:20,557 INFO L87 Difference]: Start difference. First operand 12770 states and 15545 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:34:24,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:34:24,621 INFO L93 Difference]: Finished difference Result 32298 states and 40260 transitions. [2023-11-23 22:34:24,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:34:24,622 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 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 239 [2023-11-23 22:34:24,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:34:24,665 INFO L225 Difference]: With dead ends: 32298 [2023-11-23 22:34:24,665 INFO L226 Difference]: Without dead ends: 20280 [2023-11-23 22:34:24,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:34:24,681 INFO L413 NwaCegarLoop]: 962 mSDtfsCounter, 802 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2301 mSolverCounterSat, 745 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 802 SdHoareTripleChecker+Valid, 969 SdHoareTripleChecker+Invalid, 3046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 745 IncrementalHoareTripleChecker+Valid, 2301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-11-23 22:34:24,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [802 Valid, 969 Invalid, 3046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [745 Valid, 2301 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-11-23 22:34:24,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20280 states. [2023-11-23 22:34:24,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20280 to 18778. [2023-11-23 22:34:24,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18778 states, 18777 states have (on average 1.2516908984395803) internal successors, (23503), 18777 states have internal predecessors, (23503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:34:24,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18778 states to 18778 states and 23503 transitions. [2023-11-23 22:34:24,986 INFO L78 Accepts]: Start accepts. Automaton has 18778 states and 23503 transitions. Word has length 239 [2023-11-23 22:34:24,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:34:24,987 INFO L495 AbstractCegarLoop]: Abstraction has 18778 states and 23503 transitions. [2023-11-23 22:34:24,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:34:24,988 INFO L276 IsEmpty]: Start isEmpty. Operand 18778 states and 23503 transitions. [2023-11-23 22:34:24,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2023-11-23 22:34:24,992 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:24,992 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 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] [2023-11-23 22:34:25,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9e24f0-9e18-40d4-9ae8-fa1ba0acaabc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 22:34:25,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9e24f0-9e18-40d4-9ae8-fa1ba0acaabc/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:25,213 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:25,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:25,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1383221762, now seen corresponding path program 1 times [2023-11-23 22:34:25,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:25,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639542576] [2023-11-23 22:34:25,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:25,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:25,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:25,568 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2023-11-23 22:34:25,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:25,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639542576] [2023-11-23 22:34:25,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639542576] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:34:25,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:34:25,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:34:25,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207019753] [2023-11-23 22:34:25,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:34:25,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:34:25,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:25,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:34:25,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:34:25,572 INFO L87 Difference]: Start difference. First operand 18778 states and 23503 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:34:29,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:34:29,338 INFO L93 Difference]: Finished difference Result 44314 states and 57007 transitions. [2023-11-23 22:34:29,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:34:29,339 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 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 249 [2023-11-23 22:34:29,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:34:29,401 INFO L225 Difference]: With dead ends: 44314 [2023-11-23 22:34:29,402 INFO L226 Difference]: Without dead ends: 26288 [2023-11-23 22:34:29,424 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 [2023-11-23 22:34:29,428 INFO L413 NwaCegarLoop]: 1211 mSDtfsCounter, 765 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2260 mSolverCounterSat, 526 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 1218 SdHoareTripleChecker+Invalid, 2786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 526 IncrementalHoareTripleChecker+Valid, 2260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-11-23 22:34:29,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [765 Valid, 1218 Invalid, 2786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [526 Valid, 2260 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-11-23 22:34:29,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26288 states. [2023-11-23 22:34:29,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26288 to 26288. [2023-11-23 22:34:29,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26288 states, 26287 states have (on average 1.2187012591775401) internal successors, (32036), 26287 states have internal predecessors, (32036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:34:29,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26288 states to 26288 states and 32036 transitions. [2023-11-23 22:34:29,851 INFO L78 Accepts]: Start accepts. Automaton has 26288 states and 32036 transitions. Word has length 249 [2023-11-23 22:34:29,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:34:29,852 INFO L495 AbstractCegarLoop]: Abstraction has 26288 states and 32036 transitions. [2023-11-23 22:34:29,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:34:29,853 INFO L276 IsEmpty]: Start isEmpty. Operand 26288 states and 32036 transitions. [2023-11-23 22:34:29,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2023-11-23 22:34:29,859 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:29,860 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-23 22:34:29,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 22:34:29,860 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:29,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:29,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1564398950, now seen corresponding path program 1 times [2023-11-23 22:34:29,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:29,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884436383] [2023-11-23 22:34:29,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:29,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:29,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:30,145 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2023-11-23 22:34:30,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:30,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884436383] [2023-11-23 22:34:30,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884436383] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:34:30,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:34:30,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:34:30,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730636396] [2023-11-23 22:34:30,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:34:30,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:34:30,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:30,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:34:30,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:34:30,150 INFO L87 Difference]: Start difference. First operand 26288 states and 32036 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)