./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-new/count_by_nondet.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-new/count_by_nondet.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3467a31f3cd19e731a18eaf7789079f202f3b29e437ef24ddd0458f09610424d --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 02:35:46,340 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 02:35:46,423 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 02:35:46,428 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 02:35:46,429 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 02:35:46,461 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 02:35:46,462 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 02:35:46,463 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 02:35:46,464 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 02:35:46,465 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 02:35:46,465 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 02:35:46,466 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 02:35:46,467 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 02:35:46,468 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 02:35:46,468 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 02:35:46,469 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 02:35:46,470 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 02:35:46,470 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 02:35:46,471 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 02:35:46,472 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 02:35:46,473 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 02:35:46,476 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 02:35:46,477 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 02:35:46,478 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 02:35:46,478 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 02:35:46,479 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 02:35:46,479 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 02:35:46,480 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 02:35:46,480 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 02:35:46,481 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 02:35:46,481 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 02:35:46,482 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:35:46,482 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 02:35:46,482 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 02:35:46,483 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 02:35:46,483 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 02:35:46,483 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 02:35:46,483 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 02:35:46,484 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 02:35:46,484 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 02:35:46,484 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 02:35:46,485 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 02:35:46,485 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3467a31f3cd19e731a18eaf7789079f202f3b29e437ef24ddd0458f09610424d [2023-11-29 02:35:46,757 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 02:35:46,783 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 02:35:46,786 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 02:35:46,788 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 02:35:46,788 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 02:35:46,790 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/loop-new/count_by_nondet.i [2023-11-29 02:35:50,378 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 02:35:50,571 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 02:35:50,572 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/sv-benchmarks/c/loop-new/count_by_nondet.i [2023-11-29 02:35:50,582 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya/data/0968f4a71/ae77f2e9ddfb4cc2bdeacab7bf66ea38/FLAG14174b2c9 [2023-11-29 02:35:50,603 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya/data/0968f4a71/ae77f2e9ddfb4cc2bdeacab7bf66ea38 [2023-11-29 02:35:50,606 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 02:35:50,608 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 02:35:50,610 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 02:35:50,610 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 02:35:50,618 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 02:35:50,619 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:35:50" (1/1) ... [2023-11-29 02:35:50,620 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14091061 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:35:50, skipping insertion in model container [2023-11-29 02:35:50,621 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:35:50" (1/1) ... [2023-11-29 02:35:50,650 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 02:35:50,851 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/sv-benchmarks/c/loop-new/count_by_nondet.i[891,904] [2023-11-29 02:35:50,866 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:35:50,879 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 02:35:50,896 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/sv-benchmarks/c/loop-new/count_by_nondet.i[891,904] [2023-11-29 02:35:50,900 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:35:50,920 INFO L206 MainTranslator]: Completed translation [2023-11-29 02:35:50,920 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:35:50 WrapperNode [2023-11-29 02:35:50,920 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 02:35:50,922 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 02:35:50,922 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 02:35:50,922 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 02:35:50,932 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:35:50" (1/1) ... [2023-11-29 02:35:50,940 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:35:50" (1/1) ... [2023-11-29 02:35:50,962 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 35 [2023-11-29 02:35:50,963 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 02:35:50,964 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 02:35:50,964 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 02:35:50,964 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 02:35:50,979 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:35:50" (1/1) ... [2023-11-29 02:35:50,979 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:35:50" (1/1) ... [2023-11-29 02:35:50,981 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:35:50" (1/1) ... [2023-11-29 02:35:50,995 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-29 02:35:50,996 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:35:50" (1/1) ... [2023-11-29 02:35:50,996 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:35:50" (1/1) ... [2023-11-29 02:35:50,999 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:35:50" (1/1) ... [2023-11-29 02:35:51,004 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:35:50" (1/1) ... [2023-11-29 02:35:51,005 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:35:50" (1/1) ... [2023-11-29 02:35:51,006 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:35:50" (1/1) ... [2023-11-29 02:35:51,008 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 02:35:51,009 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 02:35:51,009 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 02:35:51,010 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 02:35:51,011 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:35:50" (1/1) ... [2023-11-29 02:35:51,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:35:51,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:35:51,052 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 02:35:51,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 02:35:51,092 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 02:35:51,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 02:35:51,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 02:35:51,093 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 02:35:51,172 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 02:35:51,176 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 02:35:51,301 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 02:35:51,326 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 02:35:51,327 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 02:35:51,327 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:35:51 BoogieIcfgContainer [2023-11-29 02:35:51,328 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 02:35:51,331 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 02:35:51,331 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 02:35:51,336 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 02:35:51,336 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 02:35:50" (1/3) ... [2023-11-29 02:35:51,337 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a9224eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:35:51, skipping insertion in model container [2023-11-29 02:35:51,337 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:35:50" (2/3) ... [2023-11-29 02:35:51,338 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a9224eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:35:51, skipping insertion in model container [2023-11-29 02:35:51,338 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:35:51" (3/3) ... [2023-11-29 02:35:51,340 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_nondet.i [2023-11-29 02:35:51,366 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 02:35:51,367 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 02:35:51,429 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 02:35:51,437 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@9196f83, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 02:35:51,437 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 02:35:51,441 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:35:51,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-29 02:35:51,449 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:35:51,449 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 02:35:51,450 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:35:51,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:35:51,458 INFO L85 PathProgramCache]: Analyzing trace with hash 61508582, now seen corresponding path program 1 times [2023-11-29 02:35:51,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:35:51,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164551130] [2023-11-29 02:35:51,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:35:51,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:35:51,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:35:51,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:35:51,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:35:51,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164551130] [2023-11-29 02:35:51,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164551130] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:35:51,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:35:51,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:35:51,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331639018] [2023-11-29 02:35:51,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:35:51,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 02:35:51,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:35:51,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 02:35:51,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 02:35:51,676 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 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 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:35:51,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:35:51,701 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2023-11-29 02:35:51,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 02:35:51,705 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2023-11-29 02:35:51,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:35:51,714 INFO L225 Difference]: With dead ends: 17 [2023-11-29 02:35:51,715 INFO L226 Difference]: Without dead ends: 7 [2023-11-29 02:35:51,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 02:35:51,723 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:35:51,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:35:51,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2023-11-29 02:35:51,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2023-11-29 02:35:51,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 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) [2023-11-29 02:35:51,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2023-11-29 02:35:51,765 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2023-11-29 02:35:51,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:35:51,765 INFO L495 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2023-11-29 02:35:51,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:35:51,766 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2023-11-29 02:35:51,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-29 02:35:51,766 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:35:51,767 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 02:35:51,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 02:35:51,767 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:35:51,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:35:51,768 INFO L85 PathProgramCache]: Analyzing trace with hash 61240463, now seen corresponding path program 1 times [2023-11-29 02:35:51,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:35:51,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386620435] [2023-11-29 02:35:51,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:35:51,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:35:51,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:35:51,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:35:51,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:35:51,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386620435] [2023-11-29 02:35:51,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386620435] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:35:51,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:35:51,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:35:51,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660105385] [2023-11-29 02:35:51,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:35:51,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:35:51,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:35:51,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:35:51,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:35:51,862 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:35:51,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:35:51,880 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2023-11-29 02:35:51,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:35:51,881 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2023-11-29 02:35:51,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:35:51,882 INFO L225 Difference]: With dead ends: 13 [2023-11-29 02:35:51,882 INFO L226 Difference]: Without dead ends: 9 [2023-11-29 02:35:51,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:35:51,885 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:35:51,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 7 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:35:51,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2023-11-29 02:35:51,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2023-11-29 02:35:51,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:35:51,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2023-11-29 02:35:51,891 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 5 [2023-11-29 02:35:51,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:35:51,892 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2023-11-29 02:35:51,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:35:51,892 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2023-11-29 02:35:51,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-29 02:35:51,893 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:35:51,893 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:35:51,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 02:35:51,894 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:35:51,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:35:51,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1224314124, now seen corresponding path program 1 times [2023-11-29 02:35:51,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:35:51,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194378571] [2023-11-29 02:35:51,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:35:51,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:35:51,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:35:52,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:35:52,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:35:52,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194378571] [2023-11-29 02:35:52,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194378571] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:35:52,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835510104] [2023-11-29 02:35:52,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:35:52,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:35:52,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:35:52,019 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:35:52,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 02:35:52,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:35:52,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 02:35:52,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:35:52,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:35:52,162 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:35:52,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:35:52,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835510104] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:35:52,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:35:52,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-11-29 02:35:52,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120990909] [2023-11-29 02:35:52,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:35:52,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 02:35:52,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:35:52,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 02:35:52,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:35:52,200 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 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) [2023-11-29 02:35:52,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:35:52,223 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2023-11-29 02:35:52,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:35:52,224 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 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) Word has length 7 [2023-11-29 02:35:52,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:35:52,225 INFO L225 Difference]: With dead ends: 14 [2023-11-29 02:35:52,225 INFO L226 Difference]: Without dead ends: 10 [2023-11-29 02:35:52,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:35:52,228 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:35:52,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 7 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:35:52,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2023-11-29 02:35:52,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2023-11-29 02:35:52,233 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) [2023-11-29 02:35:52,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2023-11-29 02:35:52,233 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2023-11-29 02:35:52,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:35:52,234 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2023-11-29 02:35:52,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 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) [2023-11-29 02:35:52,234 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2023-11-29 02:35:52,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-29 02:35:52,235 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:35:52,235 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-11-29 02:35:52,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 02:35:52,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:35:52,436 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:35:52,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:35:52,438 INFO L85 PathProgramCache]: Analyzing trace with hash 308309017, now seen corresponding path program 2 times [2023-11-29 02:35:52,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:35:52,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258559014] [2023-11-29 02:35:52,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:35:52,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:35:52,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:35:52,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:35:52,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:35:52,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258559014] [2023-11-29 02:35:52,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258559014] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:35:52,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145162261] [2023-11-29 02:35:52,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:35:52,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:35:52,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:35:52,613 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:35:52,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 02:35:52,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:35:52,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:35:52,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 02:35:52,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:35:52,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:35:52,721 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:35:52,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:35:52,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145162261] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:35:52,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:35:52,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-29 02:35:52,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806609938] [2023-11-29 02:35:52,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:35:52,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 02:35:52,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:35:52,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 02:35:52,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-29 02:35:52,786 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:35:52,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:35:52,870 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2023-11-29 02:35:52,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 02:35:52,871 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-29 02:35:52,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:35:52,872 INFO L225 Difference]: With dead ends: 29 [2023-11-29 02:35:52,872 INFO L226 Difference]: Without dead ends: 19 [2023-11-29 02:35:52,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2023-11-29 02:35:52,875 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 10 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:35:52,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 24 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:35:52,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-29 02:35:52,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2023-11-29 02:35:52,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:35:52,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2023-11-29 02:35:52,882 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 9 [2023-11-29 02:35:52,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:35:52,882 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2023-11-29 02:35:52,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:35:52,883 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2023-11-29 02:35:52,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-29 02:35:52,883 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:35:52,884 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1] [2023-11-29 02:35:52,890 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 02:35:53,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:35:53,085 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:35:53,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:35:53,086 INFO L85 PathProgramCache]: Analyzing trace with hash -157918163, now seen corresponding path program 3 times [2023-11-29 02:35:53,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:35:53,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052817610] [2023-11-29 02:35:53,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:35:53,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:35:53,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:35:53,335 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:35:53,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:35:53,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052817610] [2023-11-29 02:35:53,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052817610] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:35:53,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170320681] [2023-11-29 02:35:53,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:35:53,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:35:53,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:35:53,338 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:35:53,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 02:35:53,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-29 02:35:53,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:35:53,409 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 02:35:53,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:35:53,472 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:35:53,472 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:35:53,636 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:35:53,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170320681] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:35:53,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:35:53,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-11-29 02:35:53,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960003551] [2023-11-29 02:35:53,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:35:53,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 02:35:53,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:35:53,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 02:35:53,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2023-11-29 02:35:53,640 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:35:53,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:35:53,835 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2023-11-29 02:35:53,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 02:35:53,835 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 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 17 [2023-11-29 02:35:53,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:35:53,837 INFO L225 Difference]: With dead ends: 53 [2023-11-29 02:35:53,837 INFO L226 Difference]: Without dead ends: 35 [2023-11-29 02:35:53,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=237, Invalid=465, Unknown=0, NotChecked=0, Total=702 [2023-11-29 02:35:53,839 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 34 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:35:53,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 42 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:35:53,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-29 02:35:53,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2023-11-29 02:35:53,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:35:53,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2023-11-29 02:35:53,848 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 17 [2023-11-29 02:35:53,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:35:53,848 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2023-11-29 02:35:53,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:35:53,849 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2023-11-29 02:35:53,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-29 02:35:53,850 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:35:53,850 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1] [2023-11-29 02:35:53,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-29 02:35:54,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:35:54,052 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:35:54,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:35:54,052 INFO L85 PathProgramCache]: Analyzing trace with hash -87015339, now seen corresponding path program 4 times [2023-11-29 02:35:54,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:35:54,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002639320] [2023-11-29 02:35:54,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:35:54,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:35:54,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:35:54,457 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:35:54,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:35:54,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002639320] [2023-11-29 02:35:54,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002639320] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:35:54,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683998250] [2023-11-29 02:35:54,459 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:35:54,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:35:54,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:35:54,461 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:35:54,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 02:35:54,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:35:54,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:35:54,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 02:35:54,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:35:54,652 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:35:54,653 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:35:55,216 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:35:55,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683998250] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:35:55,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:35:55,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2023-11-29 02:35:55,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569567853] [2023-11-29 02:35:55,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:35:55,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-29 02:35:55,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:35:55,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-29 02:35:55,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 02:35:55,222 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 34 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:35:55,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:35:55,718 INFO L93 Difference]: Finished difference Result 101 states and 116 transitions. [2023-11-29 02:35:55,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-29 02:35:55,719 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 34 states have internal predecessors, (69), 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 33 [2023-11-29 02:35:55,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:35:55,721 INFO L225 Difference]: With dead ends: 101 [2023-11-29 02:35:55,721 INFO L226 Difference]: Without dead ends: 67 [2023-11-29 02:35:55,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=853, Invalid=1697, Unknown=0, NotChecked=0, Total=2550 [2023-11-29 02:35:55,725 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 66 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:35:55,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 66 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:35:55,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-29 02:35:55,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2023-11-29 02:35:55,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0153846153846153) internal successors, (66), 65 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:35:55,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2023-11-29 02:35:55,737 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 33 [2023-11-29 02:35:55,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:35:55,738 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2023-11-29 02:35:55,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 34 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:35:55,738 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2023-11-29 02:35:55,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-29 02:35:55,741 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:35:55,741 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1] [2023-11-29 02:35:55,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 02:35:55,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 02:35:55,944 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:35:55,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:35:55,945 INFO L85 PathProgramCache]: Analyzing trace with hash -22275931, now seen corresponding path program 5 times [2023-11-29 02:35:55,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:35:55,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881664940] [2023-11-29 02:35:55,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:35:55,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:35:55,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:35:57,049 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:35:57,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:35:57,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881664940] [2023-11-29 02:35:57,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881664940] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:35:57,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955437422] [2023-11-29 02:35:57,050 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:35:57,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:35:57,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:35:57,052 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:35:57,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 02:35:57,168 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2023-11-29 02:35:57,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:35:57,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-29 02:35:57,175 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:35:57,324 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:35:57,324 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:35:58,727 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:35:58,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955437422] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:35:58,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:35:58,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2023-11-29 02:35:58,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690259346] [2023-11-29 02:35:58,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:35:58,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2023-11-29 02:35:58,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:35:58,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2023-11-29 02:35:58,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2085, Invalid=2337, Unknown=0, NotChecked=0, Total=4422 [2023-11-29 02:35:58,737 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand has 67 states, 67 states have (on average 1.9850746268656716) internal successors, (133), 66 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:35:59,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:35:59,839 INFO L93 Difference]: Finished difference Result 197 states and 228 transitions. [2023-11-29 02:35:59,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-11-29 02:35:59,840 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.9850746268656716) internal successors, (133), 66 states have internal predecessors, (133), 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 65 [2023-11-29 02:35:59,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:35:59,842 INFO L225 Difference]: With dead ends: 197 [2023-11-29 02:35:59,842 INFO L226 Difference]: Without dead ends: 131 [2023-11-29 02:35:59,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3237, Invalid=6465, Unknown=0, NotChecked=0, Total=9702 [2023-11-29 02:35:59,847 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 184 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:35:59,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 116 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:35:59,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-11-29 02:35:59,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2023-11-29 02:35:59,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.0077519379844961) internal successors, (130), 129 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:35:59,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2023-11-29 02:35:59,862 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 65 [2023-11-29 02:35:59,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:35:59,863 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2023-11-29 02:35:59,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.9850746268656716) internal successors, (133), 66 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:35:59,863 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2023-11-29 02:35:59,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-29 02:35:59,866 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:35:59,866 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1] [2023-11-29 02:35:59,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-29 02:36:00,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 02:36:00,072 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:36:00,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:36:00,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1249638075, now seen corresponding path program 6 times [2023-11-29 02:36:00,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:36:00,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546140956] [2023-11-29 02:36:00,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:36:00,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:36:00,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:36:03,222 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:36:03,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:36:03,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546140956] [2023-11-29 02:36:03,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546140956] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:36:03,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283965159] [2023-11-29 02:36:03,223 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 02:36:03,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:36:03,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:36:03,224 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:36:03,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 02:36:03,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 63 check-sat command(s) [2023-11-29 02:36:03,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:36:03,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 69 conjunts are in the unsatisfiable core [2023-11-29 02:36:03,440 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:36:03,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:36:03,664 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:36:08,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:36:08,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283965159] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:36:08,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:36:08,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2023-11-29 02:36:08,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195889426] [2023-11-29 02:36:08,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:36:08,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2023-11-29 02:36:08,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:36:08,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2023-11-29 02:36:08,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8261, Invalid=8769, Unknown=0, NotChecked=0, Total=17030 [2023-11-29 02:36:08,762 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand has 131 states, 131 states have (on average 1.9923664122137406) internal successors, (261), 130 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:36:12,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:36:12,372 INFO L93 Difference]: Finished difference Result 389 states and 452 transitions. [2023-11-29 02:36:12,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2023-11-29 02:36:12,373 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 1.9923664122137406) internal successors, (261), 130 states have internal predecessors, (261), 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 129 [2023-11-29 02:36:12,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:36:12,377 INFO L225 Difference]: With dead ends: 389 [2023-11-29 02:36:12,377 INFO L226 Difference]: Without dead ends: 259 [2023-11-29 02:36:12,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4408 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=12613, Invalid=25217, Unknown=0, NotChecked=0, Total=37830 [2023-11-29 02:36:12,390 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 413 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:36:12,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [413 Valid, 218 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 02:36:12,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2023-11-29 02:36:12,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 258. [2023-11-29 02:36:12,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 1.0038910505836576) internal successors, (258), 257 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:36:12,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 258 transitions. [2023-11-29 02:36:12,415 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 258 transitions. Word has length 129 [2023-11-29 02:36:12,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:36:12,415 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 258 transitions. [2023-11-29 02:36:12,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 1.9923664122137406) internal successors, (261), 130 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:36:12,416 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 258 transitions. [2023-11-29 02:36:12,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2023-11-29 02:36:12,422 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:36:12,423 INFO L195 NwaCegarLoop]: trace histogram [126, 126, 1, 1, 1, 1, 1] [2023-11-29 02:36:12,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-29 02:36:12,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:36:12,624 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:36:12,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:36:12,625 INFO L85 PathProgramCache]: Analyzing trace with hash -340465019, now seen corresponding path program 7 times [2023-11-29 02:36:12,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:36:12,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013743160] [2023-11-29 02:36:12,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:36:12,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:36:12,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:36:23,246 INFO L134 CoverageAnalysis]: Checked inductivity of 15876 backedges. 0 proven. 15876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:36:23,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:36:23,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013743160] [2023-11-29 02:36:23,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013743160] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:36:23,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081485760] [2023-11-29 02:36:23,247 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 02:36:23,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:36:23,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:36:23,248 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:36:23,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 02:36:23,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:36:23,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 1163 conjuncts, 133 conjunts are in the unsatisfiable core [2023-11-29 02:36:23,524 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:36:24,015 INFO L134 CoverageAnalysis]: Checked inductivity of 15876 backedges. 0 proven. 15876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:36:24,016 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:36:42,922 INFO L134 CoverageAnalysis]: Checked inductivity of 15876 backedges. 0 proven. 15876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:36:42,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081485760] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:36:42,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:36:42,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [129, 129, 129] total 258 [2023-11-29 02:36:42,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142544279] [2023-11-29 02:36:42,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:36:42,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 259 states [2023-11-29 02:36:42,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:36:42,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 259 interpolants. [2023-11-29 02:36:42,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32901, Invalid=33921, Unknown=0, NotChecked=0, Total=66822 [2023-11-29 02:36:42,942 INFO L87 Difference]: Start difference. First operand 258 states and 258 transitions. Second operand has 259 states, 259 states have (on average 1.9961389961389961) internal successors, (517), 258 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:36:57,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:36:57,676 INFO L93 Difference]: Finished difference Result 773 states and 900 transitions. [2023-11-29 02:36:57,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2023-11-29 02:36:57,677 INFO L78 Accepts]: Start accepts. Automaton has has 259 states, 259 states have (on average 1.9961389961389961) internal successors, (517), 258 states have internal predecessors, (517), 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 257 [2023-11-29 02:36:57,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:36:57,681 INFO L225 Difference]: With dead ends: 773 [2023-11-29 02:36:57,681 INFO L226 Difference]: Without dead ends: 515 [2023-11-29 02:36:57,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 769 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 385 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17016 ImplicationChecksByTransitivity, 35.3s TimeCoverageRelationStatistics Valid=49797, Invalid=99585, Unknown=0, NotChecked=0, Total=149382 [2023-11-29 02:36:57,696 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1028 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1028 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 02:36:57,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1028 Valid, 402 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 02:36:57,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2023-11-29 02:36:57,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 514. [2023-11-29 02:36:57,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 513 states have (on average 1.0019493177387915) internal successors, (514), 513 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:36:57,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 514 transitions. [2023-11-29 02:36:57,728 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 514 transitions. Word has length 257 [2023-11-29 02:36:57,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:36:57,729 INFO L495 AbstractCegarLoop]: Abstraction has 514 states and 514 transitions. [2023-11-29 02:36:57,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 259 states, 259 states have (on average 1.9961389961389961) internal successors, (517), 258 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:36:57,731 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 514 transitions. [2023-11-29 02:36:57,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2023-11-29 02:36:57,746 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:36:57,747 INFO L195 NwaCegarLoop]: trace histogram [254, 254, 1, 1, 1, 1, 1] [2023-11-29 02:36:57,753 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 02:36:57,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:36:57,948 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:36:57,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:36:57,948 INFO L85 PathProgramCache]: Analyzing trace with hash -635785979, now seen corresponding path program 8 times [2023-11-29 02:36:57,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:36:57,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268543758] [2023-11-29 02:36:57,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:36:57,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:36:58,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:37:37,095 INFO L134 CoverageAnalysis]: Checked inductivity of 64516 backedges. 0 proven. 64516 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:37:37,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:37:37,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268543758] [2023-11-29 02:37:37,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268543758] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:37:37,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032496544] [2023-11-29 02:37:37,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:37:37,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:37:37,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:37:37,097 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:37:37,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 02:37:37,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:37:37,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:37:37,544 INFO L262 TraceCheckSpWp]: Trace formula consists of 2315 conjuncts, 261 conjunts are in the unsatisfiable core [2023-11-29 02:37:37,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:37:38,306 INFO L134 CoverageAnalysis]: Checked inductivity of 64516 backedges. 0 proven. 64516 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:37:38,306 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:38:50,549 INFO L134 CoverageAnalysis]: Checked inductivity of 64516 backedges. 0 proven. 64516 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:38:50,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032496544] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:38:50,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:38:50,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [257, 257, 257] total 514 [2023-11-29 02:38:50,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665297618] [2023-11-29 02:38:50,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:38:50,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 515 states [2023-11-29 02:38:50,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:38:50,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 515 interpolants. [2023-11-29 02:38:50,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131333, Invalid=133377, Unknown=0, NotChecked=0, Total=264710 [2023-11-29 02:38:50,593 INFO L87 Difference]: Start difference. First operand 514 states and 514 transitions. Second operand has 515 states, 515 states have (on average 1.9980582524271844) internal successors, (1029), 514 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:40:15,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:40:15,639 INFO L93 Difference]: Finished difference Result 1541 states and 1796 transitions. [2023-11-29 02:40:15,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 768 states. [2023-11-29 02:40:15,641 INFO L78 Accepts]: Start accepts. Automaton has has 515 states, 515 states have (on average 1.9980582524271844) internal successors, (1029), 514 states have internal predecessors, (1029), 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 513 [2023-11-29 02:40:15,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:40:15,646 INFO L225 Difference]: With dead ends: 1541 [2023-11-29 02:40:15,647 INFO L226 Difference]: Without dead ends: 1027 [2023-11-29 02:40:15,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1537 GetRequests, 768 SyntacticMatches, 0 SemanticMatches, 769 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66808 ImplicationChecksByTransitivity, 136.5s TimeCoverageRelationStatistics Valid=197893, Invalid=395777, Unknown=0, NotChecked=0, Total=593670 [2023-11-29 02:40:15,679 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 2944 mSDsluCounter, 783 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2944 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 1033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:40:15,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2944 Valid, 787 Invalid, 1033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 02:40:15,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1027 states. [2023-11-29 02:40:15,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1027 to 1026. [2023-11-29 02:40:15,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1026 states, 1025 states have (on average 1.0009756097560976) internal successors, (1026), 1025 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:40:15,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026 states to 1026 states and 1026 transitions. [2023-11-29 02:40:15,704 INFO L78 Accepts]: Start accepts. Automaton has 1026 states and 1026 transitions. Word has length 513 [2023-11-29 02:40:15,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:40:15,705 INFO L495 AbstractCegarLoop]: Abstraction has 1026 states and 1026 transitions. [2023-11-29 02:40:15,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 515 states, 515 states have (on average 1.9980582524271844) internal successors, (1029), 514 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:40:15,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1026 states and 1026 transitions. [2023-11-29 02:40:15,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1026 [2023-11-29 02:40:15,745 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:40:15,745 INFO L195 NwaCegarLoop]: trace histogram [510, 510, 1, 1, 1, 1, 1] [2023-11-29 02:40:15,752 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 02:40:15,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:40:15,946 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:40:15,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:40:15,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1091161595, now seen corresponding path program 9 times [2023-11-29 02:40:15,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:40:15,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121783110] [2023-11-29 02:40:15,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:40:15,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:40:17,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:42:59,215 INFO L134 CoverageAnalysis]: Checked inductivity of 260100 backedges. 0 proven. 260100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:42:59,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:42:59,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121783110] [2023-11-29 02:42:59,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121783110] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:42:59,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146568191] [2023-11-29 02:42:59,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:42:59,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:42:59,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:42:59,217 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:42:59,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d3e406-2f11-4bf5-97da-34b07af568ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 02:43:04,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 511 check-sat command(s) [2023-11-29 02:43:04,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:43:04,500 INFO L262 TraceCheckSpWp]: Trace formula consists of 4619 conjuncts, 517 conjunts are in the unsatisfiable core [2023-11-29 02:43:04,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:43:05,668 INFO L134 CoverageAnalysis]: Checked inductivity of 260100 backedges. 0 proven. 260100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:43:05,668 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:47:13,657 INFO L134 CoverageAnalysis]: Checked inductivity of 260100 backedges. 0 proven. 260100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:47:13,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146568191] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:47:13,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:47:13,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [513, 513, 513] total 1026 [2023-11-29 02:47:13,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435290503] [2023-11-29 02:47:13,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:47:13,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 1027 states [2023-11-29 02:47:13,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:47:13,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 1027 interpolants. [2023-11-29 02:47:13,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=524805, Invalid=528897, Unknown=0, NotChecked=0, Total=1053702 [2023-11-29 02:47:13,778 INFO L87 Difference]: Start difference. First operand 1026 states and 1026 transitions. Second operand has 1027 states, 1027 states have (on average 1.9990262901655307) internal successors, (2053), 1026 states have internal predecessors, (2053), 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)