./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-new/count_by_k.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a52e73c-6fea-4384-bbc9-7f2aa6ee9400/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a52e73c-6fea-4384-bbc9-7f2aa6ee9400/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a52e73c-6fea-4384-bbc9-7f2aa6ee9400/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a52e73c-6fea-4384-bbc9-7f2aa6ee9400/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-new/count_by_k.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a52e73c-6fea-4384-bbc9-7f2aa6ee9400/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a52e73c-6fea-4384-bbc9-7f2aa6ee9400/bin/uautomizer-verify-aQ6SnzHsRB --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 ee41851a84d57c0c483c2a5edf48180b7c141c1991cdc82f0d66c6775eb49f5b --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 02:59:42,902 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 02:59:43,003 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a52e73c-6fea-4384-bbc9-7f2aa6ee9400/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 02:59:43,010 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 02:59:43,011 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 02:59:43,045 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 02:59:43,047 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 02:59:43,047 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 02:59:43,048 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 02:59:43,048 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 02:59:43,049 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 02:59:43,049 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 02:59:43,049 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 02:59:43,049 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 02:59:43,049 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 02:59:43,051 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 02:59:43,051 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 02:59:43,051 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 02:59:43,051 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 02:59:43,051 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 02:59:43,051 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 02:59:43,051 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 02:59:43,052 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 02:59:43,052 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 02:59:43,052 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 02:59:43,052 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 02:59:43,052 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 02:59:43,052 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 02:59:43,052 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 02:59:43,052 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 02:59:43,052 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 02:59:43,052 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 02:59:43,052 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:59:43,052 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 02:59:43,053 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 02:59:43,053 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 02:59:43,053 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 02:59:43,053 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:59:43,053 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 02:59:43,053 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 02:59:43,054 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 02:59:43,054 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 02:59:43,055 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 02:59:43,055 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 02:59:43,055 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 02:59:43,055 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 02:59:43,055 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 02:59:43,055 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 02:59:43,056 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_4a52e73c-6fea-4384-bbc9-7f2aa6ee9400/bin/uautomizer-verify-aQ6SnzHsRB 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 -> ee41851a84d57c0c483c2a5edf48180b7c141c1991cdc82f0d66c6775eb49f5b [2024-11-28 02:59:43,457 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 02:59:43,470 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 02:59:43,473 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 02:59:43,478 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 02:59:43,478 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 02:59:43,480 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a52e73c-6fea-4384-bbc9-7f2aa6ee9400/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/loop-new/count_by_k.i [2024-11-28 02:59:46,692 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a52e73c-6fea-4384-bbc9-7f2aa6ee9400/bin/uautomizer-verify-aQ6SnzHsRB/data/aff933ec2/bce8e3f3d87a493c90b2617d723a9040/FLAGc0c9f4566 [2024-11-28 02:59:47,005 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 02:59:47,007 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a52e73c-6fea-4384-bbc9-7f2aa6ee9400/sv-benchmarks/c/loop-new/count_by_k.i [2024-11-28 02:59:47,021 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a52e73c-6fea-4384-bbc9-7f2aa6ee9400/bin/uautomizer-verify-aQ6SnzHsRB/data/aff933ec2/bce8e3f3d87a493c90b2617d723a9040/FLAGc0c9f4566 [2024-11-28 02:59:47,073 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a52e73c-6fea-4384-bbc9-7f2aa6ee9400/bin/uautomizer-verify-aQ6SnzHsRB/data/aff933ec2/bce8e3f3d87a493c90b2617d723a9040 [2024-11-28 02:59:47,075 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 02:59:47,078 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 02:59:47,079 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 02:59:47,080 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 02:59:47,085 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 02:59:47,086 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:59:47" (1/1) ... [2024-11-28 02:59:47,088 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@380c3330 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:47, skipping insertion in model container [2024-11-28 02:59:47,089 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:59:47" (1/1) ... [2024-11-28 02:59:47,107 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 02:59:47,310 WARN L250 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_4a52e73c-6fea-4384-bbc9-7f2aa6ee9400/sv-benchmarks/c/loop-new/count_by_k.i[891,904] [2024-11-28 02:59:47,330 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 02:59:47,341 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 02:59:47,355 WARN L250 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_4a52e73c-6fea-4384-bbc9-7f2aa6ee9400/sv-benchmarks/c/loop-new/count_by_k.i[891,904] [2024-11-28 02:59:47,358 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 02:59:47,375 INFO L204 MainTranslator]: Completed translation [2024-11-28 02:59:47,376 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:47 WrapperNode [2024-11-28 02:59:47,376 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 02:59:47,377 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 02:59:47,378 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 02:59:47,378 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 02:59:47,389 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:47" (1/1) ... [2024-11-28 02:59:47,397 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:47" (1/1) ... [2024-11-28 02:59:47,413 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 31 [2024-11-28 02:59:47,414 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 02:59:47,415 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 02:59:47,416 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 02:59:47,416 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 02:59:47,426 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:47" (1/1) ... [2024-11-28 02:59:47,426 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:47" (1/1) ... [2024-11-28 02:59:47,427 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:47" (1/1) ... [2024-11-28 02:59:47,438 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]. [2024-11-28 02:59:47,439 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:47" (1/1) ... [2024-11-28 02:59:47,439 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:47" (1/1) ... [2024-11-28 02:59:47,441 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:47" (1/1) ... [2024-11-28 02:59:47,442 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:47" (1/1) ... [2024-11-28 02:59:47,446 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:47" (1/1) ... [2024-11-28 02:59:47,446 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:47" (1/1) ... [2024-11-28 02:59:47,447 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:47" (1/1) ... [2024-11-28 02:59:47,448 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 02:59:47,449 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 02:59:47,449 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 02:59:47,449 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 02:59:47,451 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:47" (1/1) ... [2024-11-28 02:59:47,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:59:47,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a52e73c-6fea-4384-bbc9-7f2aa6ee9400/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:59:47,491 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a52e73c-6fea-4384-bbc9-7f2aa6ee9400/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 02:59:47,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a52e73c-6fea-4384-bbc9-7f2aa6ee9400/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 02:59:47,532 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 02:59:47,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 02:59:47,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 02:59:47,532 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 02:59:47,600 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 02:59:47,602 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 02:59:47,723 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-11-28 02:59:47,723 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 02:59:47,737 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 02:59:47,738 INFO L312 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-28 02:59:47,740 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:59:47 BoogieIcfgContainer [2024-11-28 02:59:47,740 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 02:59:47,744 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 02:59:47,745 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 02:59:47,751 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 02:59:47,751 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 02:59:47" (1/3) ... [2024-11-28 02:59:47,752 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fac53a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:59:47, skipping insertion in model container [2024-11-28 02:59:47,753 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:47" (2/3) ... [2024-11-28 02:59:47,754 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fac53a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:59:47, skipping insertion in model container [2024-11-28 02:59:47,754 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:59:47" (3/3) ... [2024-11-28 02:59:47,756 INFO L128 eAbstractionObserver]: Analyzing ICFG count_by_k.i [2024-11-28 02:59:47,775 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 02:59:47,778 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG count_by_k.i that has 1 procedures, 13 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2024-11-28 02:59:47,853 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 02:59:47,872 INFO L333 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, 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;@6f842a01, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 02:59:47,873 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-28 02:59:47,878 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:59:47,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-28 02:59:47,885 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:59:47,885 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:59:47,886 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:59:47,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:59:47,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1807120264, now seen corresponding path program 1 times [2024-11-28 02:59:47,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:59:47,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343041346] [2024-11-28 02:59:47,904 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:59:47,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:59:47,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:59:48,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:59:48,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:59:48,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343041346] [2024-11-28 02:59:48,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343041346] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:59:48,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:59:48,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 02:59:48,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336528212] [2024-11-28 02:59:48,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:59:48,061 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-28 02:59:48,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:59:48,084 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-28 02:59:48,085 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 02:59:48,087 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:59:48,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:59:48,100 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2024-11-28 02:59:48,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-28 02:59:48,102 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-28 02:59:48,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:59:48,109 INFO L225 Difference]: With dead ends: 21 [2024-11-28 02:59:48,109 INFO L226 Difference]: Without dead ends: 9 [2024-11-28 02:59:48,112 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 02:59:48,116 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:59:48,117 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 02:59:48,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2024-11-28 02:59:48,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2024-11-28 02:59:48,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:59:48,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2024-11-28 02:59:48,153 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2024-11-28 02:59:48,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:59:48,155 INFO L471 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2024-11-28 02:59:48,155 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:59:48,156 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2024-11-28 02:59:48,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-28 02:59:48,156 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:59:48,156 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:59:48,156 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 02:59:48,157 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:59:48,157 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:59:48,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1807001100, now seen corresponding path program 1 times [2024-11-28 02:59:48,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:59:48,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307984015] [2024-11-28 02:59:48,158 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:59:48,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:59:48,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:59:48,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:59:48,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:59:48,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307984015] [2024-11-28 02:59:48,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307984015] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:59:48,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:59:48,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 02:59:48,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470804956] [2024-11-28 02:59:48,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:59:48,486 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 02:59:48,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:59:48,486 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 02:59:48,487 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:59:48,487 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:59:48,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:59:48,530 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2024-11-28 02:59:48,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 02:59:48,530 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-28 02:59:48,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:59:48,531 INFO L225 Difference]: With dead ends: 15 [2024-11-28 02:59:48,531 INFO L226 Difference]: Without dead ends: 11 [2024-11-28 02:59:48,531 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:59:48,532 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 1 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:59:48,533 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 02:59:48,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2024-11-28 02:59:48,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2024-11-28 02:59:48,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:59:48,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2024-11-28 02:59:48,537 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2024-11-28 02:59:48,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:59:48,537 INFO L471 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2024-11-28 02:59:48,538 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:59:48,538 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2024-11-28 02:59:48,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-28 02:59:48,538 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:59:48,538 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:59:48,538 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 02:59:48,539 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:59:48,539 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:59:48,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1300044976, now seen corresponding path program 1 times [2024-11-28 02:59:48,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:59:48,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143704235] [2024-11-28 02:59:48,540 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:59:48,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:59:48,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:59:48,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:59:48,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:59:48,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143704235] [2024-11-28 02:59:48,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143704235] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:59:48,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690794590] [2024-11-28 02:59:48,814 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:59:48,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:59:48,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a52e73c-6fea-4384-bbc9-7f2aa6ee9400/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:59:48,817 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a52e73c-6fea-4384-bbc9-7f2aa6ee9400/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:59:48,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a52e73c-6fea-4384-bbc9-7f2aa6ee9400/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 02:59:48,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:59:48,888 INFO L256 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 02:59:48,893 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:59:49,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:59:49,020 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:59:49,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:59:49,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690794590] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:59:49,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:59:49,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2024-11-28 02:59:49,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140879837] [2024-11-28 02:59:49,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:59:49,150 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 02:59:49,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:59:49,152 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 02:59:49,152 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-11-28 02:59:49,153 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:59:49,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:59:49,259 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2024-11-28 02:59:49,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 02:59:49,261 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-28 02:59:49,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:59:49,261 INFO L225 Difference]: With dead ends: 20 [2024-11-28 02:59:49,261 INFO L226 Difference]: Without dead ends: 16 [2024-11-28 02:59:49,262 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-11-28 02:59:49,263 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 6 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:59:49,264 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 27 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:59:49,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-11-28 02:59:49,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-11-28 02:59:49,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:59:49,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2024-11-28 02:59:49,270 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 9 [2024-11-28 02:59:49,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:59:49,271 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2024-11-28 02:59:49,271 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:59:49,271 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2024-11-28 02:59:49,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-28 02:59:49,271 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:59:49,271 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:59:49,283 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a52e73c-6fea-4384-bbc9-7f2aa6ee9400/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 02:59:49,475 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a52e73c-6fea-4384-bbc9-7f2aa6ee9400/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-28 02:59:49,475 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:59:49,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:59:49,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1824724324, now seen corresponding path program 2 times [2024-11-28 02:59:49,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:59:49,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633153336] [2024-11-28 02:59:49,476 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:59:49,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:59:49,504 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:59:49,504 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:59:49,671 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:59:49,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:59:49,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633153336] [2024-11-28 02:59:49,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633153336] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:59:49,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283250001] [2024-11-28 02:59:49,672 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:59:49,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:59:49,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a52e73c-6fea-4384-bbc9-7f2aa6ee9400/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:59:49,674 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a52e73c-6fea-4384-bbc9-7f2aa6ee9400/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:59:49,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a52e73c-6fea-4384-bbc9-7f2aa6ee9400/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 02:59:49,720 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:59:49,720 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:59:49,725 INFO L256 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 02:59:49,726 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:59:49,934 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:59:49,934 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:59:50,194 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:59:50,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283250001] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:59:50,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:59:50,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2024-11-28 02:59:50,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620012796] [2024-11-28 02:59:50,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:59:50,196 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 02:59:50,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:59:50,197 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 02:59:50,197 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2024-11-28 02:59:50,197 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:59:50,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:59:50,550 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2024-11-28 02:59:50,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 02:59:50,551 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-28 02:59:50,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:59:50,552 INFO L225 Difference]: With dead ends: 30 [2024-11-28 02:59:50,552 INFO L226 Difference]: Without dead ends: 26 [2024-11-28 02:59:50,553 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2024-11-28 02:59:50,554 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 11 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:59:50,555 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 24 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:59:50,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-28 02:59:50,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-11-28 02:59:50,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:59:50,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2024-11-28 02:59:50,569 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 15 [2024-11-28 02:59:50,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:59:50,569 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2024-11-28 02:59:50,573 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:59:50,573 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2024-11-28 02:59:50,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-28 02:59:50,574 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:59:50,574 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:59:50,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a52e73c-6fea-4384-bbc9-7f2aa6ee9400/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 02:59:50,778 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a52e73c-6fea-4384-bbc9-7f2aa6ee9400/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:59:50,779 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:59:50,781 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:59:50,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1850847792, now seen corresponding path program 3 times [2024-11-28 02:59:50,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:59:50,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828441479] [2024-11-28 02:59:50,782 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:59:50,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:59:50,811 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-28 02:59:50,812 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:59:51,228 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:59:51,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:59:51,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828441479] [2024-11-28 02:59:51,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828441479] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:59:51,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189162601] [2024-11-28 02:59:51,229 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:59:51,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:59:51,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a52e73c-6fea-4384-bbc9-7f2aa6ee9400/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:59:51,232 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a52e73c-6fea-4384-bbc9-7f2aa6ee9400/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:59:51,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a52e73c-6fea-4384-bbc9-7f2aa6ee9400/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 02:59:51,296 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-28 02:59:51,296 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:59:51,298 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 02:59:51,300 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:59:51,519 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:59:51,519 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:59:52,133 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:59:52,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189162601] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:59:52,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:59:52,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-11-28 02:59:52,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122105332] [2024-11-28 02:59:52,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:59:52,135 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-28 02:59:52,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:59:52,136 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-28 02:59:52,140 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2024-11-28 02:59:52,141 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:59:53,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:59:53,036 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2024-11-28 02:59:53,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 02:59:53,038 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-11-28 02:59:53,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:59:53,038 INFO L225 Difference]: With dead ends: 50 [2024-11-28 02:59:53,039 INFO L226 Difference]: Without dead ends: 46 [2024-11-28 02:59:53,040 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=603, Invalid=1203, Unknown=0, NotChecked=0, Total=1806 [2024-11-28 02:59:53,041 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 19 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:59:53,044 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 24 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:59:53,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-28 02:59:53,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2024-11-28 02:59:53,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 45 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:59:53,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2024-11-28 02:59:53,064 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 25 [2024-11-28 02:59:53,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:59:53,065 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2024-11-28 02:59:53,065 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:59:53,065 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2024-11-28 02:59:53,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-28 02:59:53,067 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:59:53,067 INFO L218 NwaCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:59:53,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a52e73c-6fea-4384-bbc9-7f2aa6ee9400/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-28 02:59:53,267 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a52e73c-6fea-4384-bbc9-7f2aa6ee9400/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:59:53,268 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:59:53,268 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:59:53,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1201143496, now seen corresponding path program 4 times [2024-11-28 02:59:53,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:59:53,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672009379] [2024-11-28 02:59:53,269 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:59:53,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:59:53,329 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:59:53,331 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:59:54,142 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:59:54,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:59:54,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672009379] [2024-11-28 02:59:54,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672009379] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:59:54,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566736046] [2024-11-28 02:59:54,142 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:59:54,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:59:54,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a52e73c-6fea-4384-bbc9-7f2aa6ee9400/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:59:54,145 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a52e73c-6fea-4384-bbc9-7f2aa6ee9400/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:59:54,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a52e73c-6fea-4384-bbc9-7f2aa6ee9400/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 02:59:54,206 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:59:54,206 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:59:54,209 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-28 02:59:54,211 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:59:54,479 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:59:54,479 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:59:55,607 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:59:55,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566736046] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:59:55,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:59:55,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 45 [2024-11-28 02:59:55,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586459679] [2024-11-28 02:59:55,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:59:55,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-28 02:59:55,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:59:55,610 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-28 02:59:55,611 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=647, Invalid=1333, Unknown=0, NotChecked=0, Total=1980 [2024-11-28 02:59:55,612 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:59:57,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:59:57,896 INFO L93 Difference]: Finished difference Result 90 states and 109 transitions. [2024-11-28 02:59:57,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-28 02:59:57,897 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2024-11-28 02:59:57,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:59:57,898 INFO L225 Difference]: With dead ends: 90 [2024-11-28 02:59:57,899 INFO L226 Difference]: Without dead ends: 86 [2024-11-28 02:59:57,903 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1336 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2297, Invalid=4509, Unknown=0, NotChecked=0, Total=6806 [2024-11-28 02:59:57,904 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 55 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:59:57,905 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 18 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 02:59:57,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-28 02:59:57,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2024-11-28 02:59:57,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.011764705882353) internal successors, (86), 85 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:59:57,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2024-11-28 02:59:57,919 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 45 [2024-11-28 02:59:57,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:59:57,920 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2024-11-28 02:59:57,920 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:59:57,920 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2024-11-28 02:59:57,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-11-28 02:59:57,922 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:59:57,923 INFO L218 NwaCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:59:57,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a52e73c-6fea-4384-bbc9-7f2aa6ee9400/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-28 02:59:58,127 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a52e73c-6fea-4384-bbc9-7f2aa6ee9400/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:59:58,128 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:59:58,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:59:58,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1286988792, now seen corresponding path program 5 times [2024-11-28 02:59:58,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:59:58,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428876602] [2024-11-28 02:59:58,129 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:59:58,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:59:58,233 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2024-11-28 02:59:58,233 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:00:00,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:00:00,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:00:00,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428876602] [2024-11-28 03:00:00,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428876602] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:00:00,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208773649] [2024-11-28 03:00:00,152 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:00:00,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:00:00,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a52e73c-6fea-4384-bbc9-7f2aa6ee9400/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:00:00,154 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a52e73c-6fea-4384-bbc9-7f2aa6ee9400/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:00:00,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a52e73c-6fea-4384-bbc9-7f2aa6ee9400/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 03:00:00,288 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2024-11-28 03:00:00,288 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:00:00,295 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-28 03:00:00,299 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:00:00,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:00:00,710 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:00:03,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:00:03,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208773649] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:00:03,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:00:03,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 85 [2024-11-28 03:00:03,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44988816] [2024-11-28 03:00:03,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:00:03,892 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2024-11-28 03:00:03,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:00:03,894 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2024-11-28 03:00:03,896 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=2477, Invalid=4663, Unknown=0, NotChecked=0, Total=7140 [2024-11-28 03:00:03,897 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand has 85 states, 85 states have (on average 1.9764705882352942) internal successors, (168), 85 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:00:12,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:00:12,455 INFO L93 Difference]: Finished difference Result 170 states and 209 transitions. [2024-11-28 03:00:12,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2024-11-28 03:00:12,456 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.9764705882352942) internal successors, (168), 85 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2024-11-28 03:00:12,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:00:12,461 INFO L225 Difference]: With dead ends: 170 [2024-11-28 03:00:12,465 INFO L226 Difference]: Without dead ends: 166 [2024-11-28 03:00:12,471 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 126 SyntacticMatches, 2 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5466 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=8987, Invalid=17419, Unknown=0, NotChecked=0, Total=26406 [2024-11-28 03:00:12,472 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 116 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 03:00:12,473 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 36 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 03:00:12,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2024-11-28 03:00:12,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2024-11-28 03:00:12,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.006060606060606) internal successors, (166), 165 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:00:12,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 166 transitions. [2024-11-28 03:00:12,497 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 166 transitions. Word has length 85 [2024-11-28 03:00:12,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:00:12,497 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 166 transitions. [2024-11-28 03:00:12,497 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.9764705882352942) internal successors, (168), 85 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:00:12,497 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 166 transitions. [2024-11-28 03:00:12,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2024-11-28 03:00:12,501 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:00:12,501 INFO L218 NwaCegarLoop]: trace histogram [79, 79, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:00:12,509 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a52e73c-6fea-4384-bbc9-7f2aa6ee9400/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 03:00:12,701 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a52e73c-6fea-4384-bbc9-7f2aa6ee9400/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:00:12,702 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:00:12,702 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:00:12,702 INFO L85 PathProgramCache]: Analyzing trace with hash -958324312, now seen corresponding path program 6 times [2024-11-28 03:00:12,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:00:12,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431318968] [2024-11-28 03:00:12,703 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:00:12,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:00:12,832 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 80 check-sat command(s) [2024-11-28 03:00:12,832 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:00:18,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:00:18,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:00:18,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431318968] [2024-11-28 03:00:18,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431318968] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:00:18,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207330108] [2024-11-28 03:00:18,570 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:00:18,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:00:18,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a52e73c-6fea-4384-bbc9-7f2aa6ee9400/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:00:18,572 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a52e73c-6fea-4384-bbc9-7f2aa6ee9400/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:00:18,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a52e73c-6fea-4384-bbc9-7f2aa6ee9400/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 03:00:18,719 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 80 check-sat command(s) [2024-11-28 03:00:18,719 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:00:18,723 INFO L256 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 82 conjuncts are in the unsatisfiable core [2024-11-28 03:00:18,731 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:00:19,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:00:19,347 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:00:30,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:00:30,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207330108] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:00:30,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:00:30,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83, 83] total 165 [2024-11-28 03:00:30,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791413903] [2024-11-28 03:00:30,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:00:30,587 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 165 states [2024-11-28 03:00:30,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:00:30,592 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2024-11-28 03:00:30,596 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9813, Invalid=17247, Unknown=0, NotChecked=0, Total=27060 [2024-11-28 03:00:30,596 INFO L87 Difference]: Start difference. First operand 166 states and 166 transitions. Second operand has 165 states, 165 states have (on average 1.993939393939394) internal successors, (329), 165 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:01:12,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:01:12,118 INFO L93 Difference]: Finished difference Result 330 states and 409 transitions. [2024-11-28 03:01:12,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2024-11-28 03:01:12,119 INFO L78 Accepts]: Start accepts. Automaton has has 165 states, 165 states have (on average 1.993939393939394) internal successors, (329), 165 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2024-11-28 03:01:12,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:01:12,122 INFO L225 Difference]: With dead ends: 330 [2024-11-28 03:01:12,122 INFO L226 Difference]: Without dead ends: 326 [2024-11-28 03:01:12,133 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 246 SyntacticMatches, 2 SemanticMatches, 321 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22051 ImplicationChecksByTransitivity, 54.9s TimeCoverageRelationStatistics Valid=35568, Invalid=68438, Unknown=0, NotChecked=0, Total=104006 [2024-11-28 03:01:12,133 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 158 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 03:01:12,134 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 30 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 03:01:12,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2024-11-28 03:01:12,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 326. [2024-11-28 03:01:12,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 1.003076923076923) internal successors, (326), 325 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:01:12,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 326 transitions. [2024-11-28 03:01:12,192 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 326 transitions. Word has length 165 [2024-11-28 03:01:12,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:01:12,193 INFO L471 AbstractCegarLoop]: Abstraction has 326 states and 326 transitions. [2024-11-28 03:01:12,193 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 165 states, 165 states have (on average 1.993939393939394) internal successors, (329), 165 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:01:12,194 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 326 transitions. [2024-11-28 03:01:12,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2024-11-28 03:01:12,206 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:01:12,206 INFO L218 NwaCegarLoop]: trace histogram [159, 159, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:01:12,218 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a52e73c-6fea-4384-bbc9-7f2aa6ee9400/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 03:01:12,407 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a52e73c-6fea-4384-bbc9-7f2aa6ee9400/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-28 03:01:12,407 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:01:12,408 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:01:12,408 INFO L85 PathProgramCache]: Analyzing trace with hash 505048296, now seen corresponding path program 7 times [2024-11-28 03:01:12,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:01:12,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729150107] [2024-11-28 03:01:12,408 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:01:12,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:01:13,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:01:33,143 INFO L134 CoverageAnalysis]: Checked inductivity of 25281 backedges. 0 proven. 25281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:01:33,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:01:33,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729150107] [2024-11-28 03:01:33,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729150107] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:01:33,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334613061] [2024-11-28 03:01:33,144 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:01:33,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:01:33,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a52e73c-6fea-4384-bbc9-7f2aa6ee9400/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:01:33,146 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a52e73c-6fea-4384-bbc9-7f2aa6ee9400/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:01:33,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a52e73c-6fea-4384-bbc9-7f2aa6ee9400/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 03:01:36,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:01:37,719 INFO L256 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 162 conjuncts are in the unsatisfiable core [2024-11-28 03:01:37,728 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:01:39,103 INFO L134 CoverageAnalysis]: Checked inductivity of 25281 backedges. 0 proven. 25281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:01:39,103 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:02:21,698 INFO L134 CoverageAnalysis]: Checked inductivity of 25281 backedges. 0 proven. 25281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:02:21,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334613061] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:02:21,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:02:21,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [163, 163, 163] total 326 [2024-11-28 03:02:21,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873471278] [2024-11-28 03:02:21,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:02:21,701 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 326 states [2024-11-28 03:02:21,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:02:21,716 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 326 interpolants. [2024-11-28 03:02:21,720 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38819, Invalid=67131, Unknown=0, NotChecked=0, Total=105950 [2024-11-28 03:02:21,722 INFO L87 Difference]: Start difference. First operand 326 states and 326 transitions. Second operand has 326 states, 326 states have (on average 1.9969325153374233) internal successors, (651), 326 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:06:42,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:06:42,427 INFO L93 Difference]: Finished difference Result 650 states and 809 transitions. [2024-11-28 03:06:42,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 323 states. [2024-11-28 03:06:42,428 INFO L78 Accepts]: Start accepts. Automaton has has 326 states, 326 states have (on average 1.9969325153374233) internal successors, (651), 326 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 325 [2024-11-28 03:06:42,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:06:42,431 INFO L225 Difference]: With dead ends: 650 [2024-11-28 03:06:42,431 INFO L226 Difference]: Without dead ends: 646 [2024-11-28 03:06:42,444 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1129 GetRequests, 485 SyntacticMatches, 2 SemanticMatches, 642 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89051 ImplicationChecksByTransitivity, 311.3s TimeCoverageRelationStatistics Valid=141850, Invalid=272242, Unknown=0, NotChecked=0, Total=414092 [2024-11-28 03:06:42,444 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 475 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 477 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 1145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 477 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:06:42,445 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [475 Valid, 18 Invalid, 1145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [477 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-28 03:06:42,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2024-11-28 03:06:42,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 646. [2024-11-28 03:06:42,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 645 states have (on average 1.0015503875968992) internal successors, (646), 645 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:06:42,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 646 transitions. [2024-11-28 03:06:42,485 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 646 transitions. Word has length 325 [2024-11-28 03:06:42,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:06:42,486 INFO L471 AbstractCegarLoop]: Abstraction has 646 states and 646 transitions. [2024-11-28 03:06:42,487 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 326 states, 326 states have (on average 1.9969325153374233) internal successors, (651), 326 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:06:42,487 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 646 transitions. [2024-11-28 03:06:42,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 646 [2024-11-28 03:06:42,504 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:06:42,504 INFO L218 NwaCegarLoop]: trace histogram [319, 319, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:06:42,515 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a52e73c-6fea-4384-bbc9-7f2aa6ee9400/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 03:06:42,705 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a52e73c-6fea-4384-bbc9-7f2aa6ee9400/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-28 03:06:42,705 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:06:42,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:06:42,706 INFO L85 PathProgramCache]: Analyzing trace with hash -759561368, now seen corresponding path program 8 times [2024-11-28 03:06:42,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:06:42,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191156014] [2024-11-28 03:06:42,706 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:06:42,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:06:48,158 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:06:48,159 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:07:59,306 INFO L134 CoverageAnalysis]: Checked inductivity of 101761 backedges. 0 proven. 101761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:07:59,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:07:59,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191156014] [2024-11-28 03:07:59,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191156014] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:07:59,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508800666] [2024-11-28 03:07:59,307 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:07:59,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:07:59,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a52e73c-6fea-4384-bbc9-7f2aa6ee9400/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:07:59,311 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a52e73c-6fea-4384-bbc9-7f2aa6ee9400/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:07:59,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a52e73c-6fea-4384-bbc9-7f2aa6ee9400/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 03:08:19,015 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:08:19,015 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:08:31,803 INFO L256 TraceCheckSpWp]: Trace formula consists of 988 conjuncts, 322 conjuncts are in the unsatisfiable core [2024-11-28 03:08:31,813 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:08:34,178 INFO L134 CoverageAnalysis]: Checked inductivity of 101761 backedges. 0 proven. 101761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:08:34,178 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:11:13,590 INFO L134 CoverageAnalysis]: Checked inductivity of 101761 backedges. 0 proven. 101761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:11:13,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508800666] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:11:13,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:11:13,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [323, 323, 323] total 646 [2024-11-28 03:11:13,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876040154] [2024-11-28 03:11:13,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:11:13,593 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 646 states [2024-11-28 03:11:13,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:13,610 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 646 interpolants. [2024-11-28 03:11:13,620 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=154419, Invalid=262251, Unknown=0, NotChecked=0, Total=416670 [2024-11-28 03:11:13,622 INFO L87 Difference]: Start difference. First operand 646 states and 646 transitions. Second operand has 646 states, 646 states have (on average 1.998452012383901) internal successors, (1291), 646 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:22,634 WARN L286 SmtUtils]: Spent 8.50s on a formula simplification. DAG size of input: 966 DAG size of output: 9 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 03:11:31,168 WARN L286 SmtUtils]: Spent 8.39s on a formula simplification. DAG size of input: 965 DAG size of output: 11 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 03:11:39,660 WARN L286 SmtUtils]: Spent 8.33s on a formula simplification. DAG size of input: 962 DAG size of output: 11 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 03:11:48,196 WARN L286 SmtUtils]: Spent 8.35s on a formula simplification. DAG size of input: 959 DAG size of output: 11 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 03:11:56,866 WARN L286 SmtUtils]: Spent 8.38s on a formula simplification. DAG size of input: 956 DAG size of output: 11 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 03:12:05,553 WARN L286 SmtUtils]: Spent 8.45s on a formula simplification. DAG size of input: 953 DAG size of output: 11 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 03:12:14,206 WARN L286 SmtUtils]: Spent 8.37s on a formula simplification. DAG size of input: 950 DAG size of output: 11 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 03:12:22,689 WARN L286 SmtUtils]: Spent 8.20s on a formula simplification. DAG size of input: 947 DAG size of output: 11 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 03:12:31,265 WARN L286 SmtUtils]: Spent 8.27s on a formula simplification. DAG size of input: 944 DAG size of output: 11 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 03:12:39,900 WARN L286 SmtUtils]: Spent 8.29s on a formula simplification. DAG size of input: 941 DAG size of output: 11 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 03:12:48,627 WARN L286 SmtUtils]: Spent 8.36s on a formula simplification. DAG size of input: 938 DAG size of output: 11 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 03:12:57,176 WARN L286 SmtUtils]: Spent 8.15s on a formula simplification. DAG size of input: 935 DAG size of output: 11 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 03:13:05,701 WARN L286 SmtUtils]: Spent 8.13s on a formula simplification. DAG size of input: 932 DAG size of output: 11 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 03:13:13,964 WARN L286 SmtUtils]: Spent 7.85s on a formula simplification. DAG size of input: 929 DAG size of output: 11 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 03:13:22,512 WARN L286 SmtUtils]: Spent 8.08s on a formula simplification. DAG size of input: 926 DAG size of output: 11 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 03:13:31,043 WARN L286 SmtUtils]: Spent 8.05s on a formula simplification. DAG size of input: 923 DAG size of output: 11 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 03:13:39,399 WARN L286 SmtUtils]: Spent 7.85s on a formula simplification. DAG size of input: 920 DAG size of output: 11 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)