./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label26.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label26.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya --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 0887ed233b7d9ebaebc7d3592c7422f9d4fe2418c2eecfd5d225ad45a2570d74 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:26:14,400 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:26:14,462 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 00:26:14,466 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:26:14,467 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:26:14,487 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:26:14,488 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:26:14,488 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:26:14,489 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:26:14,489 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:26:14,490 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:26:14,490 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:26:14,491 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:26:14,492 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:26:14,492 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:26:14,493 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:26:14,493 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 00:26:14,494 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 00:26:14,494 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:26:14,495 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 00:26:14,495 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:26:14,496 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 00:26:14,496 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:26:14,497 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 00:26:14,497 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 00:26:14,497 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 00:26:14,498 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:26:14,498 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:26:14,499 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:26:14,499 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:26:14,499 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:26:14,500 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:26:14,500 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:26:14,500 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:26:14,501 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 00:26:14,501 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 00:26:14,501 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 00:26:14,501 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:26:14,502 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:26:14,502 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 00:26:14,502 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:26:14,502 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:26:14,502 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_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0887ed233b7d9ebaebc7d3592c7422f9d4fe2418c2eecfd5d225ad45a2570d74 [2023-11-29 00:26:14,725 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:26:14,748 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:26:14,750 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:26:14,751 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:26:14,752 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:26:14,753 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/eca-rers2012/Problem03_label26.c [2023-11-29 00:26:17,472 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:26:17,794 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:26:17,795 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/sv-benchmarks/c/eca-rers2012/Problem03_label26.c [2023-11-29 00:26:17,810 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/data/8b2c378fd/7c060250c2414e56bc3f2d404abddb99/FLAG64761817e [2023-11-29 00:26:17,822 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/data/8b2c378fd/7c060250c2414e56bc3f2d404abddb99 [2023-11-29 00:26:17,825 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:26:17,826 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:26:17,828 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:26:17,828 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:26:17,832 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:26:17,833 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:26:17" (1/1) ... [2023-11-29 00:26:17,834 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@735f6f48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:26:17, skipping insertion in model container [2023-11-29 00:26:17,834 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:26:17" (1/1) ... [2023-11-29 00:26:17,891 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:26:18,334 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_cffe466c-df82-4f3f-9d3a-325dc27b5802/sv-benchmarks/c/eca-rers2012/Problem03_label26.c[55276,55289] [2023-11-29 00:26:18,370 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:26:18,380 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 00:26:18,588 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_cffe466c-df82-4f3f-9d3a-325dc27b5802/sv-benchmarks/c/eca-rers2012/Problem03_label26.c[55276,55289] [2023-11-29 00:26:18,603 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:26:18,618 INFO L206 MainTranslator]: Completed translation [2023-11-29 00:26:18,619 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:26:18 WrapperNode [2023-11-29 00:26:18,619 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:26:18,620 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 00:26:18,620 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 00:26:18,620 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 00:26:18,626 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:26:18" (1/1) ... [2023-11-29 00:26:18,661 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:26:18" (1/1) ... [2023-11-29 00:26:18,752 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1772 [2023-11-29 00:26:18,753 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 00:26:18,753 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 00:26:18,753 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 00:26:18,753 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 00:26:18,762 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:26:18" (1/1) ... [2023-11-29 00:26:18,763 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:26:18" (1/1) ... [2023-11-29 00:26:18,770 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:26:18" (1/1) ... [2023-11-29 00:26:18,806 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]. [2023-11-29 00:26:18,806 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:26:18" (1/1) ... [2023-11-29 00:26:18,806 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:26:18" (1/1) ... [2023-11-29 00:26:18,846 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:26:18" (1/1) ... [2023-11-29 00:26:18,857 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:26:18" (1/1) ... [2023-11-29 00:26:18,874 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:26:18" (1/1) ... [2023-11-29 00:26:18,885 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:26:18" (1/1) ... [2023-11-29 00:26:18,898 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 00:26:18,899 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 00:26:18,899 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 00:26:18,899 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 00:26:18,900 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:26:18" (1/1) ... [2023-11-29 00:26:18,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:26:18,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:26:18,925 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 00:26:18,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 00:26:18,951 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 00:26:18,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 00:26:18,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 00:26:18,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 00:26:19,030 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 00:26:19,033 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 00:26:20,721 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 00:26:20,771 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 00:26:20,771 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 00:26:20,772 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:26:20 BoogieIcfgContainer [2023-11-29 00:26:20,772 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 00:26:20,774 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 00:26:20,774 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 00:26:20,777 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 00:26:20,777 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 12:26:17" (1/3) ... [2023-11-29 00:26:20,778 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b3a45bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:26:20, skipping insertion in model container [2023-11-29 00:26:20,778 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:26:18" (2/3) ... [2023-11-29 00:26:20,778 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b3a45bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:26:20, skipping insertion in model container [2023-11-29 00:26:20,779 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:26:20" (3/3) ... [2023-11-29 00:26:20,780 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label26.c [2023-11-29 00:26:20,798 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 00:26:20,798 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 00:26:20,853 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:26:20,860 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;@57bff003, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:26:20,860 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 00:26:20,866 INFO L276 IsEmpty]: Start isEmpty. Operand has 240 states, 238 states have (on average 1.9201680672268908) internal successors, (457), 239 states have internal predecessors, (457), 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) [2023-11-29 00:26:20,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-11-29 00:26:20,880 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:26:20,881 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:26:20,881 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:26:20,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:20,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1263329180, now seen corresponding path program 1 times [2023-11-29 00:26:20,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:26:20,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722446795] [2023-11-29 00:26:20,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:20,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:26:21,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:21,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:26:21,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:26:21,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722446795] [2023-11-29 00:26:21,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722446795] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:26:21,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:26:21,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:26:21,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470164559] [2023-11-29 00:26:21,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:26:21,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 00:26:21,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:26:21,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 00:26:21,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 00:26:21,421 INFO L87 Difference]: Start difference. First operand has 240 states, 238 states have (on average 1.9201680672268908) internal successors, (457), 239 states have internal predecessors, (457), 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 77.5) internal successors, (155), 2 states have internal predecessors, (155), 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) [2023-11-29 00:26:21,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:26:21,473 INFO L93 Difference]: Finished difference Result 479 states and 913 transitions. [2023-11-29 00:26:21,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 00:26:21,476 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 77.5) internal successors, (155), 2 states have internal predecessors, (155), 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 155 [2023-11-29 00:26:21,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:26:21,490 INFO L225 Difference]: With dead ends: 479 [2023-11-29 00:26:21,490 INFO L226 Difference]: Without dead ends: 238 [2023-11-29 00:26:21,494 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 [2023-11-29 00:26:21,498 INFO L413 NwaCegarLoop]: 392 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, 392 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 [2023-11-29 00:26:21,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 392 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:26:21,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2023-11-29 00:26:21,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 238. [2023-11-29 00:26:21,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 1.6540084388185654) internal successors, (392), 237 states have internal predecessors, (392), 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) [2023-11-29 00:26:21,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 392 transitions. [2023-11-29 00:26:21,541 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 392 transitions. Word has length 155 [2023-11-29 00:26:21,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:26:21,542 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 392 transitions. [2023-11-29 00:26:21,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 77.5) internal successors, (155), 2 states have internal predecessors, (155), 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) [2023-11-29 00:26:21,543 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 392 transitions. [2023-11-29 00:26:21,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-11-29 00:26:21,545 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:26:21,546 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:26:21,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 00:26:21,547 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:26:21,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:21,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1043215951, now seen corresponding path program 1 times [2023-11-29 00:26:21,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:26:21,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139536153] [2023-11-29 00:26:21,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:21,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:26:21,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:21,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:26:21,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:26:21,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139536153] [2023-11-29 00:26:21,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139536153] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:26:21,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:26:21,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:26:21,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498492128] [2023-11-29 00:26:21,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:26:21,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:26:21,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:26:21,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:26:21,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:26:21,931 INFO L87 Difference]: Start difference. First operand 238 states and 392 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 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) [2023-11-29 00:26:22,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:26:22,933 INFO L93 Difference]: Finished difference Result 699 states and 1160 transitions. [2023-11-29 00:26:22,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:26:22,933 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 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 155 [2023-11-29 00:26:22,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:26:22,938 INFO L225 Difference]: With dead ends: 699 [2023-11-29 00:26:22,938 INFO L226 Difference]: Without dead ends: 462 [2023-11-29 00:26:22,940 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 [2023-11-29 00:26:22,941 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 101 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:26:22,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 90 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 00:26:22,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2023-11-29 00:26:22,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 448. [2023-11-29 00:26:22,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 1.6196868008948546) internal successors, (724), 447 states have internal predecessors, (724), 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) [2023-11-29 00:26:22,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 724 transitions. [2023-11-29 00:26:22,974 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 724 transitions. Word has length 155 [2023-11-29 00:26:22,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:26:22,975 INFO L495 AbstractCegarLoop]: Abstraction has 448 states and 724 transitions. [2023-11-29 00:26:22,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 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) [2023-11-29 00:26:22,975 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 724 transitions. [2023-11-29 00:26:22,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-11-29 00:26:22,980 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:26:22,980 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:26:22,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 00:26:22,983 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:26:22,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:22,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1551764101, now seen corresponding path program 1 times [2023-11-29 00:26:22,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:26:22,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216377258] [2023-11-29 00:26:22,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:22,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:26:23,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:23,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:26:23,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:26:23,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216377258] [2023-11-29 00:26:23,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216377258] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:26:23,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:26:23,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:26:23,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135193457] [2023-11-29 00:26:23,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:26:23,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:26:23,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:26:23,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:26:23,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:26:23,272 INFO L87 Difference]: Start difference. First operand 448 states and 724 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 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) [2023-11-29 00:26:24,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:26:24,109 INFO L93 Difference]: Finished difference Result 1320 states and 2138 transitions. [2023-11-29 00:26:24,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:26:24,110 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 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 160 [2023-11-29 00:26:24,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:26:24,115 INFO L225 Difference]: With dead ends: 1320 [2023-11-29 00:26:24,116 INFO L226 Difference]: Without dead ends: 873 [2023-11-29 00:26:24,118 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 [2023-11-29 00:26:24,120 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 251 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 00:26:24,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 147 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 00:26:24,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2023-11-29 00:26:24,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 869. [2023-11-29 00:26:24,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 1.5138248847926268) internal successors, (1314), 868 states have internal predecessors, (1314), 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) [2023-11-29 00:26:24,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1314 transitions. [2023-11-29 00:26:24,154 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1314 transitions. Word has length 160 [2023-11-29 00:26:24,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:26:24,155 INFO L495 AbstractCegarLoop]: Abstraction has 869 states and 1314 transitions. [2023-11-29 00:26:24,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 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) [2023-11-29 00:26:24,155 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1314 transitions. [2023-11-29 00:26:24,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-11-29 00:26:24,159 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:26:24,159 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:26:24,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 00:26:24,160 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:26:24,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:24,161 INFO L85 PathProgramCache]: Analyzing trace with hash 2027892000, now seen corresponding path program 1 times [2023-11-29 00:26:24,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:26:24,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923346349] [2023-11-29 00:26:24,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:24,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:26:24,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:24,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:26:24,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:26:24,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923346349] [2023-11-29 00:26:24,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923346349] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:26:24,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221239181] [2023-11-29 00:26:24,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:24,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:24,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:26:24,628 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:26:24,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 00:26:24,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:24,811 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:26:24,840 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:26:25,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 00:26:25,076 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:26:25,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221239181] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:26:25,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:26:25,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2023-11-29 00:26:25,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706269353] [2023-11-29 00:26:25,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:26:25,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:26:25,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:26:25,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:26:25,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:26:25,079 INFO L87 Difference]: Start difference. First operand 869 states and 1314 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 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) [2023-11-29 00:26:26,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:26:26,045 INFO L93 Difference]: Finished difference Result 2574 states and 3905 transitions. [2023-11-29 00:26:26,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:26:26,046 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 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 162 [2023-11-29 00:26:26,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:26:26,056 INFO L225 Difference]: With dead ends: 2574 [2023-11-29 00:26:26,056 INFO L226 Difference]: Without dead ends: 1706 [2023-11-29 00:26:26,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:26:26,059 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 114 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 00:26:26,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 174 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 00:26:26,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2023-11-29 00:26:26,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 1699. [2023-11-29 00:26:26,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1699 states, 1698 states have (on average 1.4487632508833923) internal successors, (2460), 1698 states have internal predecessors, (2460), 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) [2023-11-29 00:26:26,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 2460 transitions. [2023-11-29 00:26:26,106 INFO L78 Accepts]: Start accepts. Automaton has 1699 states and 2460 transitions. Word has length 162 [2023-11-29 00:26:26,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:26:26,107 INFO L495 AbstractCegarLoop]: Abstraction has 1699 states and 2460 transitions. [2023-11-29 00:26:26,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 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) [2023-11-29 00:26:26,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1699 states and 2460 transitions. [2023-11-29 00:26:26,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-11-29 00:26:26,111 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:26:26,112 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:26:26,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 00:26:26,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:26,313 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:26:26,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:26,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1014872390, now seen corresponding path program 1 times [2023-11-29 00:26:26,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:26:26,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820437413] [2023-11-29 00:26:26,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:26,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:26:26,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:26,685 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 00:26:26,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:26:26,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820437413] [2023-11-29 00:26:26,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820437413] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:26:26,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:26:26,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:26:26,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844497895] [2023-11-29 00:26:26,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:26:26,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:26:26,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:26:26,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:26:26,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:26:26,688 INFO L87 Difference]: Start difference. First operand 1699 states and 2460 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 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) [2023-11-29 00:26:27,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:26:27,609 INFO L93 Difference]: Finished difference Result 4225 states and 6096 transitions. [2023-11-29 00:26:27,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:26:27,609 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 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 [2023-11-29 00:26:27,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:26:27,624 INFO L225 Difference]: With dead ends: 4225 [2023-11-29 00:26:27,624 INFO L226 Difference]: Without dead ends: 2527 [2023-11-29 00:26:27,627 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 [2023-11-29 00:26:27,628 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 234 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 00:26:27,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 113 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 00:26:27,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2527 states. [2023-11-29 00:26:27,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2527 to 2526. [2023-11-29 00:26:27,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2526 states, 2525 states have (on average 1.4182178217821781) internal successors, (3581), 2525 states have internal predecessors, (3581), 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) [2023-11-29 00:26:27,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2526 states to 2526 states and 3581 transitions. [2023-11-29 00:26:27,709 INFO L78 Accepts]: Start accepts. Automaton has 2526 states and 3581 transitions. Word has length 172 [2023-11-29 00:26:27,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:26:27,710 INFO L495 AbstractCegarLoop]: Abstraction has 2526 states and 3581 transitions. [2023-11-29 00:26:27,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 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) [2023-11-29 00:26:27,710 INFO L276 IsEmpty]: Start isEmpty. Operand 2526 states and 3581 transitions. [2023-11-29 00:26:27,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2023-11-29 00:26:27,716 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:26:27,717 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:26:27,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 00:26:27,717 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:26:27,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:27,718 INFO L85 PathProgramCache]: Analyzing trace with hash -484206955, now seen corresponding path program 1 times [2023-11-29 00:26:27,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:26:27,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382415256] [2023-11-29 00:26:27,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:27,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:26:27,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:27,996 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 00:26:27,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:26:27,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382415256] [2023-11-29 00:26:27,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382415256] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:26:27,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:26:27,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:26:27,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777194997] [2023-11-29 00:26:27,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:26:27,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:26:27,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:26:27,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:26:27,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:26:27,999 INFO L87 Difference]: Start difference. First operand 2526 states and 3581 transitions. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 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) [2023-11-29 00:26:28,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:26:28,964 INFO L93 Difference]: Finished difference Result 7491 states and 10626 transitions. [2023-11-29 00:26:28,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:26:28,968 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 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 175 [2023-11-29 00:26:28,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:26:28,994 INFO L225 Difference]: With dead ends: 7491 [2023-11-29 00:26:28,994 INFO L226 Difference]: Without dead ends: 4966 [2023-11-29 00:26:28,998 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 [2023-11-29 00:26:28,999 INFO L413 NwaCegarLoop]: 391 mSDtfsCounter, 228 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 00:26:28,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 418 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 00:26:29,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4966 states. [2023-11-29 00:26:29,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4966 to 4964. [2023-11-29 00:26:29,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4964 states, 4963 states have (on average 1.2673786016522264) internal successors, (6290), 4963 states have internal predecessors, (6290), 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) [2023-11-29 00:26:29,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4964 states to 4964 states and 6290 transitions. [2023-11-29 00:26:29,118 INFO L78 Accepts]: Start accepts. Automaton has 4964 states and 6290 transitions. Word has length 175 [2023-11-29 00:26:29,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:26:29,118 INFO L495 AbstractCegarLoop]: Abstraction has 4964 states and 6290 transitions. [2023-11-29 00:26:29,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 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) [2023-11-29 00:26:29,119 INFO L276 IsEmpty]: Start isEmpty. Operand 4964 states and 6290 transitions. [2023-11-29 00:26:29,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2023-11-29 00:26:29,129 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:26:29,129 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:26:29,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 00:26:29,129 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:26:29,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:29,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1871645133, now seen corresponding path program 1 times [2023-11-29 00:26:29,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:26:29,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108299942] [2023-11-29 00:26:29,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:29,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:26:29,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:29,678 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 00:26:29,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:26:29,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108299942] [2023-11-29 00:26:29,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108299942] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:26:29,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49996911] [2023-11-29 00:26:29,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:29,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:29,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:26:29,683 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:26:29,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 00:26:29,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:29,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:26:29,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:26:29,931 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-29 00:26:29,931 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:26:29,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49996911] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:26:29,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:26:29,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2023-11-29 00:26:29,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692460335] [2023-11-29 00:26:29,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:26:29,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:26:29,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:26:29,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:26:29,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:26:29,934 INFO L87 Difference]: Start difference. First operand 4964 states and 6290 transitions. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 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) [2023-11-29 00:26:30,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:26:30,780 INFO L93 Difference]: Finished difference Result 14627 states and 18568 transitions. [2023-11-29 00:26:30,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:26:30,780 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 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 189 [2023-11-29 00:26:30,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:26:30,816 INFO L225 Difference]: With dead ends: 14627 [2023-11-29 00:26:30,816 INFO L226 Difference]: Without dead ends: 9664 [2023-11-29 00:26:30,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:26:30,822 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 244 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 00:26:30,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 177 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 00:26:30,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9664 states. [2023-11-29 00:26:30,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9664 to 9661. [2023-11-29 00:26:30,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9661 states, 9660 states have (on average 1.2318840579710144) internal successors, (11900), 9660 states have internal predecessors, (11900), 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) [2023-11-29 00:26:30,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9661 states to 9661 states and 11900 transitions. [2023-11-29 00:26:30,977 INFO L78 Accepts]: Start accepts. Automaton has 9661 states and 11900 transitions. Word has length 189 [2023-11-29 00:26:30,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:26:30,978 INFO L495 AbstractCegarLoop]: Abstraction has 9661 states and 11900 transitions. [2023-11-29 00:26:30,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 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) [2023-11-29 00:26:30,978 INFO L276 IsEmpty]: Start isEmpty. Operand 9661 states and 11900 transitions. [2023-11-29 00:26:30,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2023-11-29 00:26:30,990 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:26:30,990 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:26:30,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-29 00:26:31,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 00:26:31,191 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:26:31,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:31,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1082081619, now seen corresponding path program 1 times [2023-11-29 00:26:31,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:26:31,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998373420] [2023-11-29 00:26:31,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:31,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:26:31,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:31,526 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:26:31,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:26:31,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998373420] [2023-11-29 00:26:31,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998373420] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:26:31,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138620863] [2023-11-29 00:26:31,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:31,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:31,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:26:31,529 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:26:31,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 00:26:31,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:31,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 00:26:31,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:26:31,914 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 00:26:31,914 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:26:31,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138620863] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:26:31,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:26:31,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-29 00:26:31,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563794446] [2023-11-29 00:26:31,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:26:31,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:26:31,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:26:31,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:26:31,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:26:31,917 INFO L87 Difference]: Start difference. First operand 9661 states and 11900 transitions. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 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) [2023-11-29 00:26:32,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:26:32,742 INFO L93 Difference]: Finished difference Result 27273 states and 33745 transitions. [2023-11-29 00:26:32,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:26:32,743 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 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 193 [2023-11-29 00:26:32,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:26:32,804 INFO L225 Difference]: With dead ends: 27273 [2023-11-29 00:26:32,804 INFO L226 Difference]: Without dead ends: 17613 [2023-11-29 00:26:32,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:26:32,815 INFO L413 NwaCegarLoop]: 410 mSDtfsCounter, 83 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 00:26:32,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 440 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 00:26:32,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17613 states. [2023-11-29 00:26:33,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17613 to 17578. [2023-11-29 00:26:33,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17578 states, 17577 states have (on average 1.21994652102179) internal successors, (21443), 17577 states have internal predecessors, (21443), 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) [2023-11-29 00:26:33,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17578 states to 17578 states and 21443 transitions. [2023-11-29 00:26:33,078 INFO L78 Accepts]: Start accepts. Automaton has 17578 states and 21443 transitions. Word has length 193 [2023-11-29 00:26:33,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:26:33,078 INFO L495 AbstractCegarLoop]: Abstraction has 17578 states and 21443 transitions. [2023-11-29 00:26:33,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 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) [2023-11-29 00:26:33,079 INFO L276 IsEmpty]: Start isEmpty. Operand 17578 states and 21443 transitions. [2023-11-29 00:26:33,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2023-11-29 00:26:33,104 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:26:33,104 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:26:33,111 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 00:26:33,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:33,305 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:26:33,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:33,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1946506726, now seen corresponding path program 1 times [2023-11-29 00:26:33,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:26:33,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888956260] [2023-11-29 00:26:33,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:33,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:26:33,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:33,723 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 53 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-29 00:26:33,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:26:33,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888956260] [2023-11-29 00:26:33,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888956260] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:26:33,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472193576] [2023-11-29 00:26:33,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:33,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:33,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:26:33,728 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:26:33,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 00:26:33,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:33,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 00:26:33,887 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:26:34,064 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-29 00:26:34,065 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:26:34,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472193576] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:26:34,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:26:34,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-29 00:26:34,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299841911] [2023-11-29 00:26:34,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:26:34,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:26:34,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:26:34,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:26:34,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:26:34,067 INFO L87 Difference]: Start difference. First operand 17578 states and 21443 transitions. Second operand has 4 states, 4 states have (on average 47.75) internal successors, (191), 3 states have internal predecessors, (191), 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) [2023-11-29 00:26:35,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:26:35,266 INFO L93 Difference]: Finished difference Result 60849 states and 74307 transitions. [2023-11-29 00:26:35,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:26:35,266 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.75) internal successors, (191), 3 states have internal predecessors, (191), 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 203 [2023-11-29 00:26:35,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:26:35,324 INFO L225 Difference]: With dead ends: 60849 [2023-11-29 00:26:35,324 INFO L226 Difference]: Without dead ends: 43272 [2023-11-29 00:26:35,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:26:35,342 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 558 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:26:35,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [558 Valid, 437 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 00:26:35,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43272 states. [2023-11-29 00:26:35,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43272 to 41841. [2023-11-29 00:26:35,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41841 states, 41840 states have (on average 1.2112571701720842) internal successors, (50679), 41840 states have internal predecessors, (50679), 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) [2023-11-29 00:26:36,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41841 states to 41841 states and 50679 transitions. [2023-11-29 00:26:36,000 INFO L78 Accepts]: Start accepts. Automaton has 41841 states and 50679 transitions. Word has length 203 [2023-11-29 00:26:36,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:26:36,000 INFO L495 AbstractCegarLoop]: Abstraction has 41841 states and 50679 transitions. [2023-11-29 00:26:36,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.75) internal successors, (191), 3 states have internal predecessors, (191), 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) [2023-11-29 00:26:36,001 INFO L276 IsEmpty]: Start isEmpty. Operand 41841 states and 50679 transitions. [2023-11-29 00:26:36,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2023-11-29 00:26:36,032 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:26:36,032 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:26:36,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-29 00:26:36,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-29 00:26:36,236 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:26:36,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:36,237 INFO L85 PathProgramCache]: Analyzing trace with hash -86122349, now seen corresponding path program 1 times [2023-11-29 00:26:36,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:26:36,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111623681] [2023-11-29 00:26:36,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:36,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:26:36,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:36,813 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 47 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:26:36,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:26:36,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111623681] [2023-11-29 00:26:36,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111623681] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:26:36,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207575791] [2023-11-29 00:26:36,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:36,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:36,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:26:36,814 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:26:36,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 00:26:36,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:36,982 INFO L262 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:26:36,986 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:26:37,143 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 00:26:37,144 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:26:37,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207575791] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:26:37,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:26:37,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-29 00:26:37,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550681220] [2023-11-29 00:26:37,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:26:37,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:26:37,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:26:37,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:26:37,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:26:37,145 INFO L87 Difference]: Start difference. First operand 41841 states and 50679 transitions. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 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) [2023-11-29 00:26:37,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:26:37,949 INFO L93 Difference]: Finished difference Result 83687 states and 101367 transitions. [2023-11-29 00:26:37,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:26:37,950 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 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 203 [2023-11-29 00:26:37,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:26:37,994 INFO L225 Difference]: With dead ends: 83687 [2023-11-29 00:26:37,994 INFO L226 Difference]: Without dead ends: 41847 [2023-11-29 00:26:38,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:26:38,017 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 121 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:26:38,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 98 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 00:26:38,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41847 states. [2023-11-29 00:26:38,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41847 to 41841. [2023-11-29 00:26:38,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41841 states, 41840 states have (on average 1.2049952198852771) internal successors, (50417), 41840 states have internal predecessors, (50417), 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) [2023-11-29 00:26:38,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41841 states to 41841 states and 50417 transitions. [2023-11-29 00:26:38,557 INFO L78 Accepts]: Start accepts. Automaton has 41841 states and 50417 transitions. Word has length 203 [2023-11-29 00:26:38,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:26:38,557 INFO L495 AbstractCegarLoop]: Abstraction has 41841 states and 50417 transitions. [2023-11-29 00:26:38,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 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) [2023-11-29 00:26:38,558 INFO L276 IsEmpty]: Start isEmpty. Operand 41841 states and 50417 transitions. [2023-11-29 00:26:38,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2023-11-29 00:26:38,605 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:26:38,605 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:26:38,610 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 00:26:38,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 00:26:38,806 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:26:38,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:38,807 INFO L85 PathProgramCache]: Analyzing trace with hash -80709523, now seen corresponding path program 1 times [2023-11-29 00:26:38,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:26:38,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005170336] [2023-11-29 00:26:38,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:38,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:26:38,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:39,150 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 56 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-29 00:26:39,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:26:39,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005170336] [2023-11-29 00:26:39,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005170336] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:26:39,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444313077] [2023-11-29 00:26:39,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:39,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:39,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:26:39,152 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:26:39,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 00:26:39,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:39,324 INFO L262 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 00:26:39,329 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:26:39,589 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 56 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 00:26:39,590 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:26:39,771 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 56 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 00:26:39,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444313077] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:26:39,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:26:39,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 6 [2023-11-29 00:26:39,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036040180] [2023-11-29 00:26:39,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:26:39,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:26:39,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:26:39,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:26:39,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:26:39,775 INFO L87 Difference]: Start difference. First operand 41841 states and 50417 transitions. Second operand has 6 states, 6 states have (on average 65.66666666666667) internal successors, (394), 6 states have internal predecessors, (394), 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) [2023-11-29 00:26:43,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:26:43,734 INFO L93 Difference]: Finished difference Result 131241 states and 157948 transitions. [2023-11-29 00:26:43,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 00:26:43,748 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 65.66666666666667) internal successors, (394), 6 states have internal predecessors, (394), 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 206 [2023-11-29 00:26:43,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:26:43,827 INFO L225 Difference]: With dead ends: 131241 [2023-11-29 00:26:43,827 INFO L226 Difference]: Without dead ends: 89400 [2023-11-29 00:26:43,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 416 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-11-29 00:26:43,840 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 2809 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 3834 mSolverCounterSat, 734 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2809 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 4568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 734 IncrementalHoareTripleChecker+Valid, 3834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:26:43,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2809 Valid, 407 Invalid, 4568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [734 Valid, 3834 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-11-29 00:26:43,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89400 states. [2023-11-29 00:26:44,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89400 to 87299. [2023-11-29 00:26:44,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87299 states, 87298 states have (on average 1.1552040138376596) internal successors, (100847), 87298 states have internal predecessors, (100847), 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) [2023-11-29 00:26:45,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87299 states to 87299 states and 100847 transitions. [2023-11-29 00:26:45,012 INFO L78 Accepts]: Start accepts. Automaton has 87299 states and 100847 transitions. Word has length 206 [2023-11-29 00:26:45,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:26:45,012 INFO L495 AbstractCegarLoop]: Abstraction has 87299 states and 100847 transitions. [2023-11-29 00:26:45,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 65.66666666666667) internal successors, (394), 6 states have internal predecessors, (394), 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) [2023-11-29 00:26:45,013 INFO L276 IsEmpty]: Start isEmpty. Operand 87299 states and 100847 transitions. [2023-11-29 00:26:45,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2023-11-29 00:26:45,170 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:26:45,170 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:26:45,188 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 00:26:45,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 00:26:45,376 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:26:45,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:45,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1556573375, now seen corresponding path program 1 times [2023-11-29 00:26:45,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:26:45,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037787472] [2023-11-29 00:26:45,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:45,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:26:45,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:45,619 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 00:26:45,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:26:45,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037787472] [2023-11-29 00:26:45,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037787472] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:26:45,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:26:45,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:26:45,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891125503] [2023-11-29 00:26:45,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:26:45,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:26:45,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:26:45,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:26:45,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:26:45,621 INFO L87 Difference]: Start difference. First operand 87299 states and 100847 transitions. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 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) [2023-11-29 00:26:46,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:26:46,766 INFO L93 Difference]: Finished difference Result 188237 states and 217750 transitions. [2023-11-29 00:26:46,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:26:46,767 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 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 248 [2023-11-29 00:26:46,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:26:46,876 INFO L225 Difference]: With dead ends: 188237 [2023-11-29 00:26:46,876 INFO L226 Difference]: Without dead ends: 100939 [2023-11-29 00:26:46,922 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 [2023-11-29 00:26:46,923 INFO L413 NwaCegarLoop]: 383 mSDtfsCounter, 142 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 00:26:46,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 405 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 00:26:47,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100939 states. [2023-11-29 00:26:48,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100939 to 100921. [2023-11-29 00:26:48,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100921 states, 100920 states have (on average 1.1462544589774077) internal successors, (115680), 100920 states have internal predecessors, (115680), 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) [2023-11-29 00:26:48,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100921 states to 100921 states and 115680 transitions. [2023-11-29 00:26:48,401 INFO L78 Accepts]: Start accepts. Automaton has 100921 states and 115680 transitions. Word has length 248 [2023-11-29 00:26:48,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:26:48,401 INFO L495 AbstractCegarLoop]: Abstraction has 100921 states and 115680 transitions. [2023-11-29 00:26:48,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 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) [2023-11-29 00:26:48,402 INFO L276 IsEmpty]: Start isEmpty. Operand 100921 states and 115680 transitions. [2023-11-29 00:26:48,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2023-11-29 00:26:48,430 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:26:48,430 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:26:48,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-29 00:26:48,431 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:26:48,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:48,431 INFO L85 PathProgramCache]: Analyzing trace with hash 403534775, now seen corresponding path program 1 times [2023-11-29 00:26:48,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:26:48,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345300248] [2023-11-29 00:26:48,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:48,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:26:48,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:48,795 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-29 00:26:48,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:26:48,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345300248] [2023-11-29 00:26:48,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345300248] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:26:48,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:26:48,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:26:48,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270528228] [2023-11-29 00:26:48,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:26:48,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:26:48,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:26:48,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:26:48,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:26:48,797 INFO L87 Difference]: Start difference. First operand 100921 states and 115680 transitions. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 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) [2023-11-29 00:26:50,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:26:50,203 INFO L93 Difference]: Finished difference Result 256491 states and 293561 transitions. [2023-11-29 00:26:50,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:26:50,203 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 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 261 [2023-11-29 00:26:50,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:26:50,357 INFO L225 Difference]: With dead ends: 256491 [2023-11-29 00:26:50,357 INFO L226 Difference]: Without dead ends: 155571 [2023-11-29 00:26:50,389 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 [2023-11-29 00:26:50,390 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 218 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 00:26:50,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 178 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 00:26:50,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155571 states. [2023-11-29 00:26:52,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155571 to 155556. [2023-11-29 00:26:52,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155556 states, 155555 states have (on average 1.1411012182186364) internal successors, (177504), 155555 states have internal predecessors, (177504), 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) [2023-11-29 00:26:52,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155556 states to 155556 states and 177504 transitions. [2023-11-29 00:26:52,595 INFO L78 Accepts]: Start accepts. Automaton has 155556 states and 177504 transitions. Word has length 261 [2023-11-29 00:26:52,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:26:52,595 INFO L495 AbstractCegarLoop]: Abstraction has 155556 states and 177504 transitions. [2023-11-29 00:26:52,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 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) [2023-11-29 00:26:52,596 INFO L276 IsEmpty]: Start isEmpty. Operand 155556 states and 177504 transitions. [2023-11-29 00:26:52,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2023-11-29 00:26:52,628 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:26:52,628 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:26:52,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-29 00:26:52,629 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:26:52,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:52,629 INFO L85 PathProgramCache]: Analyzing trace with hash -841768494, now seen corresponding path program 1 times [2023-11-29 00:26:52,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:26:52,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813760045] [2023-11-29 00:26:52,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:52,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:26:52,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:53,210 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 121 proven. 6 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-29 00:26:53,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:26:53,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813760045] [2023-11-29 00:26:53,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813760045] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:26:53,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893649374] [2023-11-29 00:26:53,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:53,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:53,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:26:53,212 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:26:53,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 00:26:53,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:53,438 INFO L262 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 00:26:53,442 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:26:53,602 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-29 00:26:53,603 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:26:53,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893649374] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:26:53,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:26:53,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-11-29 00:26:53,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127305913] [2023-11-29 00:26:53,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:26:53,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:26:53,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:26:53,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:26:53,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:26:53,605 INFO L87 Difference]: Start difference. First operand 155556 states and 177504 transitions. Second operand has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 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) [2023-11-29 00:26:55,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:26:55,335 INFO L93 Difference]: Finished difference Result 331622 states and 379174 transitions. [2023-11-29 00:26:55,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:26:55,348 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 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 265 [2023-11-29 00:26:55,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:26:55,548 INFO L225 Difference]: With dead ends: 331622 [2023-11-29 00:26:55,548 INFO L226 Difference]: Without dead ends: 176067 [2023-11-29 00:26:55,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:26:55,586 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 160 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 00:26:55,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 167 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 00:26:55,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176067 states. [2023-11-29 00:26:57,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176067 to 171783. [2023-11-29 00:26:57,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171783 states, 171782 states have (on average 1.1364461934312093) internal successors, (195221), 171782 states have internal predecessors, (195221), 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) [2023-11-29 00:26:57,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171783 states to 171783 states and 195221 transitions. [2023-11-29 00:26:57,703 INFO L78 Accepts]: Start accepts. Automaton has 171783 states and 195221 transitions. Word has length 265 [2023-11-29 00:26:57,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:26:57,704 INFO L495 AbstractCegarLoop]: Abstraction has 171783 states and 195221 transitions. [2023-11-29 00:26:57,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 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) [2023-11-29 00:26:57,704 INFO L276 IsEmpty]: Start isEmpty. Operand 171783 states and 195221 transitions. [2023-11-29 00:26:57,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2023-11-29 00:26:57,751 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:26:57,752 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:26:57,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 00:26:57,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 00:26:57,953 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:26:57,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:57,953 INFO L85 PathProgramCache]: Analyzing trace with hash 327241032, now seen corresponding path program 1 times [2023-11-29 00:26:57,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:26:57,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65367996] [2023-11-29 00:26:57,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:57,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:26:58,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:58,606 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 68 proven. 6 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-29 00:26:58,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:26:58,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65367996] [2023-11-29 00:26:58,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65367996] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:26:58,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464531366] [2023-11-29 00:26:58,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:58,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:58,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:26:58,608 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:26:58,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 00:26:58,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:58,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 00:26:58,785 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:26:58,860 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-29 00:26:58,861 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:26:58,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464531366] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:26:58,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:26:58,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-29 00:26:58,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014288554] [2023-11-29 00:26:58,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:26:58,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:26:58,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:26:58,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:26:58,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:26:58,863 INFO L87 Difference]: Start difference. First operand 171783 states and 195221 transitions. Second operand has 4 states, 4 states have (on average 47.75) internal successors, (191), 3 states have internal predecessors, (191), 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) [2023-11-29 00:27:01,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:27:01,116 INFO L93 Difference]: Finished difference Result 477432 states and 542346 transitions. [2023-11-29 00:27:01,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:27:01,116 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.75) internal successors, (191), 3 states have internal predecessors, (191), 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 268 [2023-11-29 00:27:01,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:27:01,532 INFO L225 Difference]: With dead ends: 477432 [2023-11-29 00:27:01,532 INFO L226 Difference]: Without dead ends: 305650 [2023-11-29 00:27:01,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:27:01,620 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 807 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 807 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 00:27:01,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [807 Valid, 383 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 00:27:01,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305650 states. [2023-11-29 00:27:05,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305650 to 290805. [2023-11-29 00:27:05,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290805 states, 290804 states have (on average 1.1375943934746426) internal successors, (330817), 290804 states have internal predecessors, (330817), 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) [2023-11-29 00:27:05,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290805 states to 290805 states and 330817 transitions. [2023-11-29 00:27:05,566 INFO L78 Accepts]: Start accepts. Automaton has 290805 states and 330817 transitions. Word has length 268 [2023-11-29 00:27:05,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:27:05,566 INFO L495 AbstractCegarLoop]: Abstraction has 290805 states and 330817 transitions. [2023-11-29 00:27:05,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.75) internal successors, (191), 3 states have internal predecessors, (191), 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) [2023-11-29 00:27:05,566 INFO L276 IsEmpty]: Start isEmpty. Operand 290805 states and 330817 transitions. [2023-11-29 00:27:06,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2023-11-29 00:27:06,004 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:27:06,005 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:27:06,011 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 00:27:06,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 00:27:06,211 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:27:06,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:27:06,212 INFO L85 PathProgramCache]: Analyzing trace with hash -2079620196, now seen corresponding path program 1 times [2023-11-29 00:27:06,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:27:06,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001233475] [2023-11-29 00:27:06,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:27:06,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:27:06,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:27:06,466 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-11-29 00:27:06,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:27:06,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001233475] [2023-11-29 00:27:06,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001233475] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:27:06,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:27:06,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:27:06,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464115050] [2023-11-29 00:27:06,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:27:06,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:27:06,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:27:06,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:27:06,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:27:06,469 INFO L87 Difference]: Start difference. First operand 290805 states and 330817 transitions. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 2 states have internal predecessors, (223), 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) [2023-11-29 00:27:09,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:27:09,332 INFO L93 Difference]: Finished difference Result 659994 states and 756019 transitions. [2023-11-29 00:27:09,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:27:09,332 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 2 states have internal predecessors, (223), 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 269 [2023-11-29 00:27:09,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:27:09,767 INFO L225 Difference]: With dead ends: 659994 [2023-11-29 00:27:09,767 INFO L226 Difference]: Without dead ends: 369190 [2023-11-29 00:27:09,840 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 [2023-11-29 00:27:09,841 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 181 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 00:27:09,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 164 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 00:27:10,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369190 states. [2023-11-29 00:27:14,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369190 to 363073. [2023-11-29 00:27:14,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363073 states, 363072 states have (on average 1.1156602547153183) internal successors, (405065), 363072 states have internal predecessors, (405065), 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) [2023-11-29 00:27:15,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363073 states to 363073 states and 405065 transitions. [2023-11-29 00:27:15,147 INFO L78 Accepts]: Start accepts. Automaton has 363073 states and 405065 transitions. Word has length 269 [2023-11-29 00:27:15,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:27:15,147 INFO L495 AbstractCegarLoop]: Abstraction has 363073 states and 405065 transitions. [2023-11-29 00:27:15,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 2 states have internal predecessors, (223), 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) [2023-11-29 00:27:15,147 INFO L276 IsEmpty]: Start isEmpty. Operand 363073 states and 405065 transitions. [2023-11-29 00:27:15,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2023-11-29 00:27:15,192 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:27:15,193 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:27:15,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-29 00:27:15,193 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:27:15,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:27:15,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1312117211, now seen corresponding path program 1 times [2023-11-29 00:27:15,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:27:15,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919355103] [2023-11-29 00:27:15,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:27:15,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:27:15,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:27:15,438 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2023-11-29 00:27:15,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:27:15,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919355103] [2023-11-29 00:27:15,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919355103] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:27:15,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:27:15,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:27:15,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506715661] [2023-11-29 00:27:15,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:27:15,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:27:15,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:27:15,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:27:15,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:27:15,440 INFO L87 Difference]: Start difference. First operand 363073 states and 405065 transitions. Second operand has 4 states, 4 states have (on average 49.75) internal successors, (199), 3 states have internal predecessors, (199), 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) [2023-11-29 00:27:20,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:27:20,010 INFO L93 Difference]: Finished difference Result 1014909 states and 1130055 transitions. [2023-11-29 00:27:20,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:27:20,011 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 49.75) internal successors, (199), 3 states have internal predecessors, (199), 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 270 [2023-11-29 00:27:20,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:27:20,914 INFO L225 Difference]: With dead ends: 1014909 [2023-11-29 00:27:20,914 INFO L226 Difference]: Without dead ends: 651837 [2023-11-29 00:27:21,076 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 [2023-11-29 00:27:21,077 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 547 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 00:27:21,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [547 Valid, 399 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 771 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 00:27:21,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651837 states. [2023-11-29 00:27:28,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651837 to 651787. [2023-11-29 00:27:29,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651787 states, 651786 states have (on average 1.1110164992804388) internal successors, (724145), 651786 states have internal predecessors, (724145), 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) [2023-11-29 00:27:30,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651787 states to 651787 states and 724145 transitions. [2023-11-29 00:27:30,815 INFO L78 Accepts]: Start accepts. Automaton has 651787 states and 724145 transitions. Word has length 270 [2023-11-29 00:27:30,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:27:30,815 INFO L495 AbstractCegarLoop]: Abstraction has 651787 states and 724145 transitions. [2023-11-29 00:27:30,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.75) internal successors, (199), 3 states have internal predecessors, (199), 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) [2023-11-29 00:27:30,815 INFO L276 IsEmpty]: Start isEmpty. Operand 651787 states and 724145 transitions. [2023-11-29 00:27:30,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2023-11-29 00:27:30,892 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:27:30,893 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:27:30,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-29 00:27:30,893 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:27:30,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:27:30,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1833804360, now seen corresponding path program 1 times [2023-11-29 00:27:30,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:27:30,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584668614] [2023-11-29 00:27:30,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:27:30,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:27:30,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:27:31,326 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 136 proven. 6 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2023-11-29 00:27:31,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:27:31,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584668614] [2023-11-29 00:27:31,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584668614] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:27:31,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405838013] [2023-11-29 00:27:31,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:27:31,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:27:31,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:27:31,327 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:27:31,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 00:27:31,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:27:31,528 INFO L262 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 00:27:31,531 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:27:31,561 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 205 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-11-29 00:27:31,561 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:27:31,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405838013] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:27:31,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:27:31,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-29 00:27:31,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649647480] [2023-11-29 00:27:31,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:27:31,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:27:31,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:27:31,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:27:31,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:27:31,563 INFO L87 Difference]: Start difference. First operand 651787 states and 724145 transitions. Second operand has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 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) [2023-11-29 00:27:37,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:27:37,668 INFO L93 Difference]: Finished difference Result 1761543 states and 1960238 transitions. [2023-11-29 00:27:37,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:27:37,669 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 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 274 [2023-11-29 00:27:37,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:27:39,653 INFO L225 Difference]: With dead ends: 1761543 [2023-11-29 00:27:39,653 INFO L226 Difference]: Without dead ends: 1109960 [2023-11-29 00:27:39,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:27:39,896 INFO L413 NwaCegarLoop]: 630 mSDtfsCounter, 307 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 923 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:27:39,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 923 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 00:27:40,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109960 states. [2023-11-29 00:27:52,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109960 to 1094727. [2023-11-29 00:27:53,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094727 states, 1094726 states have (on average 1.1059607609575364) internal successors, (1210724), 1094726 states have internal predecessors, (1210724), 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) [2023-11-29 00:27:56,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094727 states to 1094727 states and 1210724 transitions. [2023-11-29 00:27:56,028 INFO L78 Accepts]: Start accepts. Automaton has 1094727 states and 1210724 transitions. Word has length 274 [2023-11-29 00:27:56,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:27:56,028 INFO L495 AbstractCegarLoop]: Abstraction has 1094727 states and 1210724 transitions. [2023-11-29 00:27:56,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 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) [2023-11-29 00:27:56,028 INFO L276 IsEmpty]: Start isEmpty. Operand 1094727 states and 1210724 transitions. [2023-11-29 00:27:56,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2023-11-29 00:27:56,098 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:27:56,098 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:27:56,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 00:27:56,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:27:56,299 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:27:56,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:27:56,299 INFO L85 PathProgramCache]: Analyzing trace with hash -595898219, now seen corresponding path program 1 times [2023-11-29 00:27:56,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:27:56,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015303020] [2023-11-29 00:27:56,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:27:56,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:27:56,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:27:57,333 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 94 proven. 6 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-29 00:27:57,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:27:57,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015303020] [2023-11-29 00:27:57,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015303020] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:27:57,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326674259] [2023-11-29 00:27:57,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:27:57,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:27:57,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:27:57,335 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:27:57,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cffe466c-df82-4f3f-9d3a-325dc27b5802/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 00:27:57,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:27:57,551 INFO L262 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 00:27:57,555 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:27:57,687 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-29 00:27:57,687 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:27:57,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326674259] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:27:57,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:27:57,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-29 00:27:57,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133402533] [2023-11-29 00:27:57,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:27:57,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:27:57,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:27:57,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:27:57,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:27:57,690 INFO L87 Difference]: Start difference. First operand 1094727 states and 1210724 transitions. Second operand has 4 states, 4 states have (on average 51.0) internal successors, (204), 3 states have internal predecessors, (204), 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) [2023-11-29 00:28:05,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:28:05,432 INFO L93 Difference]: Finished difference Result 2229914 states and 2464320 transitions. [2023-11-29 00:28:05,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:28:05,433 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 51.0) internal successors, (204), 3 states have internal predecessors, (204), 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 281 [2023-11-29 00:28:05,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:28:07,541 INFO L225 Difference]: With dead ends: 2229914 [2023-11-29 00:28:07,542 INFO L226 Difference]: Without dead ends: 1135391 [2023-11-29 00:28:07,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:28:07,858 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 584 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 584 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 00:28:07,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [584 Valid, 181 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 00:28:08,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1135391 states.