./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/sum_25x0-2.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_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/sum_25x0-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0189dbb29c824fc5d22409df9775c70fa543bd61c2bf554681db703f0a461966 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:27:45,343 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:27:45,466 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-24 21:27:45,474 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:27:45,475 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:27:45,513 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:27:45,514 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:27:45,514 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:27:45,515 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:27:45,520 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:27:45,521 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:27:45,522 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:27:45,523 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:27:45,525 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:27:45,525 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:27:45,526 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:27:45,526 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 21:27:45,527 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:27:45,527 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:27:45,527 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:27:45,528 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:27:45,529 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 21:27:45,529 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:27:45,529 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 21:27:45,530 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:27:45,530 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 21:27:45,531 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:27:45,532 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:27:45,532 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:27:45,533 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:27:45,534 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:27:45,534 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:27:45,535 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:27:45,535 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:27:45,536 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 21:27:45,536 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:27:45,536 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:27:45,536 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:27:45,537 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:27:45,537 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 21:27:45,537 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:27:45,538 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:27:45,538 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_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0189dbb29c824fc5d22409df9775c70fa543bd61c2bf554681db703f0a461966 [2023-11-24 21:27:45,881 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:27:45,914 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:27:45,917 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:27:45,919 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:27:45,919 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:27:45,920 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/recursive-simple/sum_25x0-2.c [2023-11-24 21:27:49,163 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:27:49,350 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:27:49,350 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/sv-benchmarks/c/recursive-simple/sum_25x0-2.c [2023-11-24 21:27:49,359 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/data/b030678fd/14d4b34b5ac24910a24c37649a88f889/FLAG66b064935 [2023-11-24 21:27:49,376 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/data/b030678fd/14d4b34b5ac24910a24c37649a88f889 [2023-11-24 21:27:49,378 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:27:49,380 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:27:49,382 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:27:49,382 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:27:49,388 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:27:49,389 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:27:49" (1/1) ... [2023-11-24 21:27:49,390 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@639c0b2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:27:49, skipping insertion in model container [2023-11-24 21:27:49,390 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:27:49" (1/1) ... [2023-11-24 21:27:49,412 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:27:49,661 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_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/sv-benchmarks/c/recursive-simple/sum_25x0-2.c[481,494] [2023-11-24 21:27:49,667 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:27:49,676 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:27:49,690 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_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/sv-benchmarks/c/recursive-simple/sum_25x0-2.c[481,494] [2023-11-24 21:27:49,691 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:27:49,705 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:27:49,705 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:27:49 WrapperNode [2023-11-24 21:27:49,706 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:27:49,707 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:27:49,707 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:27:49,707 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:27:49,716 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:27:49" (1/1) ... [2023-11-24 21:27:49,722 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:27:49" (1/1) ... [2023-11-24 21:27:49,739 INFO L138 Inliner]: procedures = 12, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 19 [2023-11-24 21:27:49,739 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:27:49,740 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:27:49,740 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:27:49,740 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:27:49,751 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:27:49" (1/1) ... [2023-11-24 21:27:49,751 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:27:49" (1/1) ... [2023-11-24 21:27:49,752 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:27:49" (1/1) ... [2023-11-24 21:27:49,761 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-24 21:27:49,761 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:27:49" (1/1) ... [2023-11-24 21:27:49,762 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:27:49" (1/1) ... [2023-11-24 21:27:49,764 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:27:49" (1/1) ... [2023-11-24 21:27:49,766 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:27:49" (1/1) ... [2023-11-24 21:27:49,767 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:27:49" (1/1) ... [2023-11-24 21:27:49,767 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:27:49" (1/1) ... [2023-11-24 21:27:49,769 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:27:49,770 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:27:49,770 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:27:49,770 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:27:49,771 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:27:49" (1/1) ... [2023-11-24 21:27:49,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:27:49,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:27:49,810 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:27:49,850 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:27:49,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:27:49,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:27:49,851 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2023-11-24 21:27:49,851 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2023-11-24 21:27:49,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:27:49,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:27:49,929 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:27:49,932 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:27:50,112 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:27:50,145 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:27:50,149 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-24 21:27:50,150 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:27:50 BoogieIcfgContainer [2023-11-24 21:27:50,150 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:27:50,153 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:27:50,154 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:27:50,157 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:27:50,158 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:27:49" (1/3) ... [2023-11-24 21:27:50,159 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a8f8f03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:27:50, skipping insertion in model container [2023-11-24 21:27:50,160 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:27:49" (2/3) ... [2023-11-24 21:27:50,161 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a8f8f03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:27:50, skipping insertion in model container [2023-11-24 21:27:50,162 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:27:50" (3/3) ... [2023-11-24 21:27:50,163 INFO L112 eAbstractionObserver]: Analyzing ICFG sum_25x0-2.c [2023-11-24 21:27:50,184 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:27:50,184 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 21:27:50,251 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:27:50,260 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;@5291fd70, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:27:50,261 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 21:27:50,266 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 21:27:50,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-24 21:27:50,275 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:27:50,276 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:27:50,277 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:27:50,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:27:50,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1493244868, now seen corresponding path program 1 times [2023-11-24 21:27:50,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:27:50,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855065523] [2023-11-24 21:27:50,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:27:50,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:27:50,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:50,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:27:50,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:50,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:27:50,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:27:50,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855065523] [2023-11-24 21:27:50,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855065523] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:27:50,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:27:50,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:27:50,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662546180] [2023-11-24 21:27:50,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:27:50,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:27:50,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:27:50,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:27:50,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:27:50,646 INFO L87 Difference]: Start difference. First operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:27:50,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:27:50,731 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2023-11-24 21:27:50,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:27:50,737 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2023-11-24 21:27:50,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:27:50,745 INFO L225 Difference]: With dead ends: 22 [2023-11-24 21:27:50,746 INFO L226 Difference]: Without dead ends: 14 [2023-11-24 21:27:50,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:27:50,757 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 9 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:27:50,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 17 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:27:50,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-11-24 21:27:50,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-11-24 21:27:50,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 10 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-24 21:27:50,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2023-11-24 21:27:50,802 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2023-11-24 21:27:50,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:27:50,803 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2023-11-24 21:27:50,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:27:50,804 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2023-11-24 21:27:50,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-24 21:27:50,806 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:27:50,806 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:27:50,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:27:50,807 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:27:50,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:27:50,808 INFO L85 PathProgramCache]: Analyzing trace with hash -642736818, now seen corresponding path program 1 times [2023-11-24 21:27:50,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:27:50,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296305128] [2023-11-24 21:27:50,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:27:50,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:27:50,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:50,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:27:50,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:51,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:27:51,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:51,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-24 21:27:51,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:27:51,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296305128] [2023-11-24 21:27:51,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296305128] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:27:51,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865721847] [2023-11-24 21:27:51,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:27:51,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:27:51,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:27:51,064 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:27:51,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:27:51,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:51,142 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-24 21:27:51,148 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:27:51,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-24 21:27:51,221 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:27:51,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:27:51,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865721847] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:27:51,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:27:51,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 10 [2023-11-24 21:27:51,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46441228] [2023-11-24 21:27:51,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:27:51,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-24 21:27:51,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:27:51,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-24 21:27:51,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-24 21:27:51,432 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 10 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-24 21:27:51,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:27:51,499 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2023-11-24 21:27:51,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:27:51,500 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 15 [2023-11-24 21:27:51,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:27:51,501 INFO L225 Difference]: With dead ends: 21 [2023-11-24 21:27:51,502 INFO L226 Difference]: Without dead ends: 17 [2023-11-24 21:27:51,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2023-11-24 21:27:51,504 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 9 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:27:51,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 29 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:27:51,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-24 21:27:51,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-24 21:27:51,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 12 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-24 21:27:51,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2023-11-24 21:27:51,512 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2023-11-24 21:27:51,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:27:51,513 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2023-11-24 21:27:51,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-24 21:27:51,514 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2023-11-24 21:27:51,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-24 21:27:51,515 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:27:51,515 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:27:51,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 21:27:51,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:27:51,722 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:27:51,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:27:51,722 INFO L85 PathProgramCache]: Analyzing trace with hash -2123675004, now seen corresponding path program 2 times [2023-11-24 21:27:51,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:27:51,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210359529] [2023-11-24 21:27:51,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:27:51,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:27:51,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:51,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:27:51,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:52,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:27:52,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:52,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:27:52,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:52,164 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-24 21:27:52,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:27:52,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210359529] [2023-11-24 21:27:52,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210359529] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:27:52,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028543423] [2023-11-24 21:27:52,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:27:52,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:27:52,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:27:52,177 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:27:52,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:27:52,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:27:52,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:27:52,250 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-24 21:27:52,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:27:52,321 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-24 21:27:52,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:27:52,651 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 21:27:52,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028543423] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:27:52,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:27:52,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 12 [2023-11-24 21:27:52,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166812289] [2023-11-24 21:27:52,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:27:52,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-24 21:27:52,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:27:52,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-24 21:27:52,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-11-24 21:27:52,655 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 12 states, 10 states have (on average 2.2) internal successors, (22), 11 states have internal predecessors, (22), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2023-11-24 21:27:52,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:27:52,742 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2023-11-24 21:27:52,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 21:27:52,742 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.2) internal successors, (22), 11 states have internal predecessors, (22), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) Word has length 21 [2023-11-24 21:27:52,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:27:52,744 INFO L225 Difference]: With dead ends: 24 [2023-11-24 21:27:52,744 INFO L226 Difference]: Without dead ends: 20 [2023-11-24 21:27:52,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2023-11-24 21:27:52,749 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 26 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:27:52,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 25 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:27:52,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-24 21:27:52,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-11-24 21:27:52,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 14 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 21:27:52,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2023-11-24 21:27:52,760 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2023-11-24 21:27:52,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:27:52,760 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2023-11-24 21:27:52,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.2) internal successors, (22), 11 states have internal predecessors, (22), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2023-11-24 21:27:52,761 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2023-11-24 21:27:52,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-24 21:27:52,762 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:27:52,762 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:27:52,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 21:27:52,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:27:52,968 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:27:52,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:27:52,969 INFO L85 PathProgramCache]: Analyzing trace with hash 54189198, now seen corresponding path program 3 times [2023-11-24 21:27:52,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:27:52,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030275092] [2023-11-24 21:27:52,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:27:52,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:27:52,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:53,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:27:53,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:53,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:27:53,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:53,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:27:53,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:53,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:27:53,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:53,307 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-24 21:27:53,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:27:53,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030275092] [2023-11-24 21:27:53,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030275092] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:27:53,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046756836] [2023-11-24 21:27:53,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 21:27:53,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:27:53,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:27:53,310 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:27:53,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 21:27:53,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-24 21:27:53,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:27:53,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-24 21:27:53,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:27:53,461 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-24 21:27:53,461 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:27:54,066 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 21:27:54,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046756836] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:27:54,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:27:54,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11] total 14 [2023-11-24 21:27:54,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588393950] [2023-11-24 21:27:54,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:27:54,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-24 21:27:54,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:27:54,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-24 21:27:54,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-11-24 21:27:54,072 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 14 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) [2023-11-24 21:27:54,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:27:54,162 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2023-11-24 21:27:54,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 21:27:54,163 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) Word has length 27 [2023-11-24 21:27:54,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:27:54,164 INFO L225 Difference]: With dead ends: 27 [2023-11-24 21:27:54,165 INFO L226 Difference]: Without dead ends: 23 [2023-11-24 21:27:54,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2023-11-24 21:27:54,168 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 28 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:27:54,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 31 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:27:54,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-24 21:27:54,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-24 21:27:54,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 16 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-24 21:27:54,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2023-11-24 21:27:54,175 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2023-11-24 21:27:54,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:27:54,176 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2023-11-24 21:27:54,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) [2023-11-24 21:27:54,176 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2023-11-24 21:27:54,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-24 21:27:54,178 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:27:54,178 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:27:54,188 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-24 21:27:54,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:27:54,383 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:27:54,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:27:54,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1269749436, now seen corresponding path program 4 times [2023-11-24 21:27:54,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:27:54,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5282159] [2023-11-24 21:27:54,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:27:54,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:27:54,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:54,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:27:54,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:54,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:27:54,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:54,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:27:54,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:54,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:27:54,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:54,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:27:54,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:54,699 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-24 21:27:54,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:27:54,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5282159] [2023-11-24 21:27:54,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5282159] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:27:54,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219944234] [2023-11-24 21:27:54,700 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-24 21:27:54,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:27:54,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:27:54,701 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:27:54,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 21:27:54,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-24 21:27:54,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:27:54,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-24 21:27:54,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:27:54,835 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-24 21:27:54,835 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:27:55,746 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-24 21:27:55,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219944234] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:27:55,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:27:55,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 13] total 16 [2023-11-24 21:27:55,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072296622] [2023-11-24 21:27:55,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:27:55,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-24 21:27:55,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:27:55,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-24 21:27:55,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-11-24 21:27:55,750 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 16 states, 14 states have (on average 2.142857142857143) internal successors, (30), 15 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) [2023-11-24 21:27:55,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:27:55,851 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2023-11-24 21:27:55,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 21:27:55,852 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.142857142857143) internal successors, (30), 15 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) Word has length 33 [2023-11-24 21:27:55,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:27:55,853 INFO L225 Difference]: With dead ends: 30 [2023-11-24 21:27:55,853 INFO L226 Difference]: Without dead ends: 26 [2023-11-24 21:27:55,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 62 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2023-11-24 21:27:55,855 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 28 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:27:55,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 33 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:27:55,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-24 21:27:55,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-11-24 21:27:55,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 18 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-24 21:27:55,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2023-11-24 21:27:55,861 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 33 [2023-11-24 21:27:55,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:27:55,861 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2023-11-24 21:27:55,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.142857142857143) internal successors, (30), 15 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) [2023-11-24 21:27:55,862 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2023-11-24 21:27:55,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-24 21:27:55,863 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:27:55,864 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:27:55,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 21:27:56,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:27:56,069 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:27:56,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:27:56,070 INFO L85 PathProgramCache]: Analyzing trace with hash -4035634, now seen corresponding path program 5 times [2023-11-24 21:27:56,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:27:56,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145476794] [2023-11-24 21:27:56,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:27:56,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:27:56,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:56,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:27:56,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:56,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:27:56,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:56,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:27:56,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:56,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:27:56,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:56,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:27:56,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:56,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:27:56,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:56,477 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-24 21:27:56,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:27:56,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145476794] [2023-11-24 21:27:56,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145476794] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:27:56,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270307155] [2023-11-24 21:27:56,477 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-24 21:27:56,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:27:56,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:27:56,499 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:27:56,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 21:27:56,586 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-11-24 21:27:56,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:27:56,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-24 21:27:56,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:27:56,658 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-24 21:27:56,658 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:27:58,017 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-24 21:27:58,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270307155] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:27:58,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:27:58,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 15] total 18 [2023-11-24 21:27:58,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320005649] [2023-11-24 21:27:58,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:27:58,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-24 21:27:58,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:27:58,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-24 21:27:58,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2023-11-24 21:27:58,020 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 18 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2023-11-24 21:27:58,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:27:58,134 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2023-11-24 21:27:58,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 21:27:58,136 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) Word has length 39 [2023-11-24 21:27:58,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:27:58,139 INFO L225 Difference]: With dead ends: 33 [2023-11-24 21:27:58,139 INFO L226 Difference]: Without dead ends: 29 [2023-11-24 21:27:58,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 74 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=373, Unknown=0, NotChecked=0, Total=552 [2023-11-24 21:27:58,142 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 34 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:27:58,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 39 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:27:58,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-24 21:27:58,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-11-24 21:27:58,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 20 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-24 21:27:58,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2023-11-24 21:27:58,157 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 39 [2023-11-24 21:27:58,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:27:58,159 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2023-11-24 21:27:58,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2023-11-24 21:27:58,161 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2023-11-24 21:27:58,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-24 21:27:58,164 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:27:58,164 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:27:58,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 21:27:58,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-24 21:27:58,370 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:27:58,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:27:58,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1047611388, now seen corresponding path program 6 times [2023-11-24 21:27:58,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:27:58,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895335569] [2023-11-24 21:27:58,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:27:58,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:27:58,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:58,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:27:58,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:58,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:27:58,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:58,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:27:58,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:58,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:27:58,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:58,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:27:58,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:58,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:27:58,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:58,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:27:58,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:58,898 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-24 21:27:58,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:27:58,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895335569] [2023-11-24 21:27:58,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895335569] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:27:58,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91911413] [2023-11-24 21:27:58,899 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-24 21:27:58,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:27:58,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:27:58,900 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:27:58,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 21:27:59,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-11-24 21:27:59,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:27:59,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-24 21:27:59,009 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:27:59,082 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-24 21:27:59,083 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:28:01,107 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-24 21:28:01,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91911413] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:28:01,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:28:01,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 17] total 20 [2023-11-24 21:28:01,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888428280] [2023-11-24 21:28:01,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:28:01,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-24 21:28:01,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:28:01,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-24 21:28:01,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2023-11-24 21:28:01,116 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 20 states, 18 states have (on average 2.111111111111111) internal successors, (38), 19 states have internal predecessors, (38), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) [2023-11-24 21:28:01,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:28:01,249 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2023-11-24 21:28:01,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-24 21:28:01,250 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.111111111111111) internal successors, (38), 19 states have internal predecessors, (38), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) Word has length 45 [2023-11-24 21:28:01,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:28:01,254 INFO L225 Difference]: With dead ends: 36 [2023-11-24 21:28:01,254 INFO L226 Difference]: Without dead ends: 32 [2023-11-24 21:28:01,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 86 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2023-11-24 21:28:01,257 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 51 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:28:01,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 43 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:28:01,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-24 21:28:01,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-11-24 21:28:01,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 22 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-24 21:28:01,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2023-11-24 21:28:01,268 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 45 [2023-11-24 21:28:01,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:28:01,269 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2023-11-24 21:28:01,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.111111111111111) internal successors, (38), 19 states have internal predecessors, (38), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) [2023-11-24 21:28:01,270 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2023-11-24 21:28:01,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-24 21:28:01,278 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:28:01,278 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:28:01,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-24 21:28:01,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:28:01,490 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:28:01,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:28:01,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1466649358, now seen corresponding path program 7 times [2023-11-24 21:28:01,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:28:01,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048502683] [2023-11-24 21:28:01,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:28:01,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:28:01,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:01,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:28:01,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:01,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:28:01,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:01,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:28:01,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:01,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:28:01,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:01,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:28:01,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:01,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:28:01,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:01,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:28:01,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:01,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:28:01,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:01,999 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-11-24 21:28:01,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:28:01,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048502683] [2023-11-24 21:28:01,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048502683] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:28:01,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457310116] [2023-11-24 21:28:01,999 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-24 21:28:02,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:28:02,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:28:02,005 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:28:02,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-24 21:28:02,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:02,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-24 21:28:02,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:28:02,215 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-11-24 21:28:02,215 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:28:04,987 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-24 21:28:04,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457310116] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:28:04,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:28:04,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 22 [2023-11-24 21:28:04,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140423183] [2023-11-24 21:28:04,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:28:04,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-24 21:28:04,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:28:04,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-24 21:28:04,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2023-11-24 21:28:04,990 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 22 states, 20 states have (on average 2.1) internal successors, (42), 21 states have internal predecessors, (42), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2023-11-24 21:28:05,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:28:05,155 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2023-11-24 21:28:05,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-24 21:28:05,155 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.1) internal successors, (42), 21 states have internal predecessors, (42), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) Word has length 51 [2023-11-24 21:28:05,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:28:05,156 INFO L225 Difference]: With dead ends: 39 [2023-11-24 21:28:05,157 INFO L226 Difference]: Without dead ends: 35 [2023-11-24 21:28:05,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 98 SyntacticMatches, 8 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2023-11-24 21:28:05,158 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 62 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:28:05,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 49 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:28:05,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-24 21:28:05,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-11-24 21:28:05,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 24 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (10), 9 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-24 21:28:05,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2023-11-24 21:28:05,168 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 51 [2023-11-24 21:28:05,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:28:05,170 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2023-11-24 21:28:05,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.1) internal successors, (42), 21 states have internal predecessors, (42), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2023-11-24 21:28:05,171 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2023-11-24 21:28:05,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-24 21:28:05,173 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:28:05,174 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:28:05,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-24 21:28:05,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:28:05,379 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:28:05,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:28:05,379 INFO L85 PathProgramCache]: Analyzing trace with hash 335541956, now seen corresponding path program 8 times [2023-11-24 21:28:05,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:28:05,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864825371] [2023-11-24 21:28:05,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:28:05,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:28:05,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:05,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:28:05,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:05,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:28:05,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:05,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:28:05,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:05,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:28:05,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:05,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:28:05,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:05,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:28:05,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:05,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:28:05,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:06,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:28:06,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:06,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:28:06,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:06,078 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-24 21:28:06,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:28:06,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864825371] [2023-11-24 21:28:06,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864825371] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:28:06,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593183763] [2023-11-24 21:28:06,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:28:06,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:28:06,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:28:06,080 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:28:06,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-24 21:28:06,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:28:06,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:28:06,236 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-24 21:28:06,238 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:28:06,331 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-24 21:28:06,332 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:28:10,129 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-24 21:28:10,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593183763] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:28:10,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:28:10,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 21] total 24 [2023-11-24 21:28:10,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651133980] [2023-11-24 21:28:10,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:28:10,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-24 21:28:10,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:28:10,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-24 21:28:10,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2023-11-24 21:28:10,133 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 24 states, 22 states have (on average 2.090909090909091) internal successors, (46), 23 states have internal predecessors, (46), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) [2023-11-24 21:28:10,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:28:10,302 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2023-11-24 21:28:10,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-24 21:28:10,303 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.090909090909091) internal successors, (46), 23 states have internal predecessors, (46), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) Word has length 57 [2023-11-24 21:28:10,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:28:10,305 INFO L225 Difference]: With dead ends: 42 [2023-11-24 21:28:10,305 INFO L226 Difference]: Without dead ends: 38 [2023-11-24 21:28:10,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 110 SyntacticMatches, 9 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=344, Invalid=712, Unknown=0, NotChecked=0, Total=1056 [2023-11-24 21:28:10,309 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 62 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:28:10,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 51 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:28:10,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-24 21:28:10,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-11-24 21:28:10,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.04) internal successors, (26), 26 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (11), 10 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-24 21:28:10,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2023-11-24 21:28:10,323 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 57 [2023-11-24 21:28:10,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:28:10,324 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2023-11-24 21:28:10,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.090909090909091) internal successors, (46), 23 states have internal predecessors, (46), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) [2023-11-24 21:28:10,324 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2023-11-24 21:28:10,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-24 21:28:10,325 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:28:10,325 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:28:10,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-24 21:28:10,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:28:10,526 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:28:10,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:28:10,526 INFO L85 PathProgramCache]: Analyzing trace with hash -682001842, now seen corresponding path program 9 times [2023-11-24 21:28:10,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:28:10,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351088649] [2023-11-24 21:28:10,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:28:10,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:28:10,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:10,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:28:10,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:10,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:28:10,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:10,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:28:10,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:11,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:28:11,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:11,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:28:11,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:11,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:28:11,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:11,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:28:11,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:11,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:28:11,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:11,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:28:11,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:11,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:28:11,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:11,307 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-11-24 21:28:11,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:28:11,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351088649] [2023-11-24 21:28:11,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351088649] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:28:11,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454589295] [2023-11-24 21:28:11,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 21:28:11,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:28:11,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:28:11,309 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:28:11,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-24 21:28:11,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-11-24 21:28:11,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:28:11,528 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-24 21:28:11,531 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:28:11,623 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-11-24 21:28:11,623 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:28:16,467 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-24 21:28:16,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454589295] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:28:16,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:28:16,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 23] total 26 [2023-11-24 21:28:16,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848729358] [2023-11-24 21:28:16,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:28:16,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-24 21:28:16,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:28:16,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-24 21:28:16,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=479, Unknown=0, NotChecked=0, Total=650 [2023-11-24 21:28:16,471 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 26 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 25 states have internal predecessors, (50), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) [2023-11-24 21:28:16,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:28:16,639 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2023-11-24 21:28:16,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-24 21:28:16,640 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 25 states have internal predecessors, (50), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) Word has length 63 [2023-11-24 21:28:16,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:28:16,641 INFO L225 Difference]: With dead ends: 45 [2023-11-24 21:28:16,641 INFO L226 Difference]: Without dead ends: 41 [2023-11-24 21:28:16,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 122 SyntacticMatches, 10 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=411, Invalid=849, Unknown=0, NotChecked=0, Total=1260 [2023-11-24 21:28:16,643 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 80 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:28:16,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 53 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:28:16,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-24 21:28:16,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-11-24 21:28:16,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.037037037037037) internal successors, (28), 28 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (12), 11 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-24 21:28:16,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2023-11-24 21:28:16,649 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 63 [2023-11-24 21:28:16,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:28:16,650 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2023-11-24 21:28:16,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 25 states have internal predecessors, (50), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) [2023-11-24 21:28:16,650 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2023-11-24 21:28:16,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-24 21:28:16,651 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:28:16,651 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:28:16,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-24 21:28:16,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:28:16,856 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:28:16,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:28:16,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1904272772, now seen corresponding path program 10 times [2023-11-24 21:28:16,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:28:16,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027667686] [2023-11-24 21:28:16,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:28:16,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:28:16,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:16,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:28:17,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:17,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:28:17,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:17,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:28:17,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:17,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:28:17,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:17,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:28:17,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:17,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:28:17,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:17,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:28:17,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:17,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:28:17,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:17,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:28:17,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:17,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:28:17,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:17,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:28:17,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:17,655 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2023-11-24 21:28:17,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:28:17,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027667686] [2023-11-24 21:28:17,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027667686] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:28:17,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510687120] [2023-11-24 21:28:17,656 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-24 21:28:17,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:28:17,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:28:17,661 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:28:17,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-24 21:28:17,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-24 21:28:17,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:28:17,928 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-24 21:28:17,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:28:18,029 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2023-11-24 21:28:18,030 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:28:24,305 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-24 21:28:24,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510687120] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:28:24,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:28:24,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 25] total 28 [2023-11-24 21:28:24,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293948062] [2023-11-24 21:28:24,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:28:24,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-24 21:28:24,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:28:24,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-24 21:28:24,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=558, Unknown=0, NotChecked=0, Total=756 [2023-11-24 21:28:24,309 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 28 states, 26 states have (on average 2.076923076923077) internal successors, (54), 27 states have internal predecessors, (54), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) [2023-11-24 21:28:24,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:28:24,480 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2023-11-24 21:28:24,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-24 21:28:24,481 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.076923076923077) internal successors, (54), 27 states have internal predecessors, (54), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) Word has length 69 [2023-11-24 21:28:24,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:28:24,482 INFO L225 Difference]: With dead ends: 48 [2023-11-24 21:28:24,482 INFO L226 Difference]: Without dead ends: 44 [2023-11-24 21:28:24,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 134 SyntacticMatches, 11 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=484, Invalid=998, Unknown=0, NotChecked=0, Total=1482 [2023-11-24 21:28:24,484 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 27 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:28:24,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 63 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:28:24,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-24 21:28:24,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-11-24 21:28:24,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 30 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (13), 12 states have call predecessors, (13), 2 states have call successors, (13) [2023-11-24 21:28:24,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2023-11-24 21:28:24,490 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 69 [2023-11-24 21:28:24,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:28:24,490 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2023-11-24 21:28:24,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.076923076923077) internal successors, (54), 27 states have internal predecessors, (54), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) [2023-11-24 21:28:24,490 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2023-11-24 21:28:24,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-24 21:28:24,491 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:28:24,491 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:28:24,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-24 21:28:24,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-24 21:28:24,698 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:28:24,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:28:24,698 INFO L85 PathProgramCache]: Analyzing trace with hash -776930930, now seen corresponding path program 11 times [2023-11-24 21:28:24,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:28:24,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636572948] [2023-11-24 21:28:24,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:28:24,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:28:24,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:24,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:28:24,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:25,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:28:25,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:25,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:28:25,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:25,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:28:25,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:25,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:28:25,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:25,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:28:25,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:25,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:28:25,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:25,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:28:25,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:25,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:28:25,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:25,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:28:25,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:25,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:28:25,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:25,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:28:25,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:25,661 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2023-11-24 21:28:25,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:28:25,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636572948] [2023-11-24 21:28:25,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636572948] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:28:25,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284487221] [2023-11-24 21:28:25,661 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-24 21:28:25,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:28:25,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:28:25,665 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:28:25,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-24 21:28:26,030 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2023-11-24 21:28:26,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:28:26,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-24 21:28:26,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:28:26,147 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2023-11-24 21:28:26,147 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:28:34,607 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-24 21:28:34,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284487221] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:28:34,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:28:34,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 27] total 30 [2023-11-24 21:28:34,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828822507] [2023-11-24 21:28:34,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:28:34,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-24 21:28:34,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:28:34,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-24 21:28:34,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=643, Unknown=0, NotChecked=0, Total=870 [2023-11-24 21:28:34,611 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 30 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 29 states have internal predecessors, (58), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) [2023-11-24 21:28:34,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:28:34,827 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2023-11-24 21:28:34,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-24 21:28:34,828 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 29 states have internal predecessors, (58), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) Word has length 75 [2023-11-24 21:28:34,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:28:34,829 INFO L225 Difference]: With dead ends: 51 [2023-11-24 21:28:34,829 INFO L226 Difference]: Without dead ends: 47 [2023-11-24 21:28:34,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 146 SyntacticMatches, 12 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=563, Invalid=1159, Unknown=0, NotChecked=0, Total=1722 [2023-11-24 21:28:34,832 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 29 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:28:34,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 67 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:28:34,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-24 21:28:34,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-11-24 21:28:34,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 31 states have (on average 1.032258064516129) internal successors, (32), 32 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (14), 13 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-24 21:28:34,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2023-11-24 21:28:34,838 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 75 [2023-11-24 21:28:34,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:28:34,838 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2023-11-24 21:28:34,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 29 states have internal predecessors, (58), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) [2023-11-24 21:28:34,839 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2023-11-24 21:28:34,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-11-24 21:28:34,840 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:28:34,840 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:28:34,857 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-24 21:28:35,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-24 21:28:35,047 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:28:35,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:28:35,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1158839228, now seen corresponding path program 12 times [2023-11-24 21:28:35,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:28:35,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679639613] [2023-11-24 21:28:35,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:28:35,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:28:35,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:35,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:28:35,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:35,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:28:35,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:35,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:28:35,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:35,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:28:35,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:35,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:28:35,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:35,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:28:35,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:35,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:28:35,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:36,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:28:36,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:36,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:28:36,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:36,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:28:36,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:36,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:28:36,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:36,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:28:36,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:36,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:28:36,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:36,261 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2023-11-24 21:28:36,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:28:36,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679639613] [2023-11-24 21:28:36,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679639613] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:28:36,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518358968] [2023-11-24 21:28:36,262 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-24 21:28:36,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:28:36,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:28:36,265 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:28:36,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d456c12-e9b3-4d95-99be-5e49ebfbfc35/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-24 21:28:36,745 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2023-11-24 21:28:36,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:28:36,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-24 21:28:36,750 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:28:36,854 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2023-11-24 21:28:36,854 INFO L327 TraceCheckSpWp]: Computing backward predicates...