./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/const_1-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34aade3-3705-4c5b-8580-25fbaaf572f1/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34aade3-3705-4c5b-8580-25fbaaf572f1/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_b34aade3-3705-4c5b-8580-25fbaaf572f1/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34aade3-3705-4c5b-8580-25fbaaf572f1/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-acceleration/const_1-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34aade3-3705-4c5b-8580-25fbaaf572f1/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_b34aade3-3705-4c5b-8580-25fbaaf572f1/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 806c78936017d752a8835e8cd9fbe8a1f06095f8d4eacbf3053870dd4f98f68e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-28 23:56:30,760 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-28 23:56:30,820 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34aade3-3705-4c5b-8580-25fbaaf572f1/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-28 23:56:30,826 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-28 23:56:30,826 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-28 23:56:30,850 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-28 23:56:30,851 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-28 23:56:30,852 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-28 23:56:30,852 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-28 23:56:30,853 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-28 23:56:30,853 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-28 23:56:30,854 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-28 23:56:30,855 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-28 23:56:30,855 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-28 23:56:30,856 INFO L153 SettingsManager]: * Use SBE=true [2023-11-28 23:56:30,856 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-28 23:56:30,857 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-28 23:56:30,857 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-28 23:56:30,858 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-28 23:56:30,858 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-28 23:56:30,859 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-28 23:56:30,859 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-28 23:56:30,860 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-28 23:56:30,860 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-28 23:56:30,861 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-28 23:56:30,861 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-28 23:56:30,861 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-28 23:56:30,862 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-28 23:56:30,862 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-28 23:56:30,863 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-28 23:56:30,863 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-28 23:56:30,864 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 23:56:30,864 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-28 23:56:30,865 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-28 23:56:30,865 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-28 23:56:30,865 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-28 23:56:30,866 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-28 23:56:30,866 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-28 23:56:30,867 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-28 23:56:30,867 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-28 23:56:30,867 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-28 23:56:30,868 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-28 23:56:30,868 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_b34aade3-3705-4c5b-8580-25fbaaf572f1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34aade3-3705-4c5b-8580-25fbaaf572f1/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 806c78936017d752a8835e8cd9fbe8a1f06095f8d4eacbf3053870dd4f98f68e [2023-11-28 23:56:31,081 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-28 23:56:31,101 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-28 23:56:31,104 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-28 23:56:31,105 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-28 23:56:31,106 INFO L274 PluginConnector]: CDTParser initialized [2023-11-28 23:56:31,107 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34aade3-3705-4c5b-8580-25fbaaf572f1/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/loop-acceleration/const_1-2.c [2023-11-28 23:56:33,889 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-28 23:56:34,042 INFO L384 CDTParser]: Found 1 translation units. [2023-11-28 23:56:34,043 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34aade3-3705-4c5b-8580-25fbaaf572f1/sv-benchmarks/c/loop-acceleration/const_1-2.c [2023-11-28 23:56:34,048 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34aade3-3705-4c5b-8580-25fbaaf572f1/bin/uautomizer-verify-BQ2R08f2Ya/data/d91008443/d95c1aa48f70448d947e5abcaa4d94bc/FLAGafa6111d7 [2023-11-28 23:56:34,058 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34aade3-3705-4c5b-8580-25fbaaf572f1/bin/uautomizer-verify-BQ2R08f2Ya/data/d91008443/d95c1aa48f70448d947e5abcaa4d94bc [2023-11-28 23:56:34,060 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-28 23:56:34,061 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-28 23:56:34,062 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-28 23:56:34,062 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-28 23:56:34,066 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-28 23:56:34,067 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:56:34" (1/1) ... [2023-11-28 23:56:34,068 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ddfa867 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:56:34, skipping insertion in model container [2023-11-28 23:56:34,068 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:56:34" (1/1) ... [2023-11-28 23:56:34,084 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 23:56:34,196 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_b34aade3-3705-4c5b-8580-25fbaaf572f1/sv-benchmarks/c/loop-acceleration/const_1-2.c[321,334] [2023-11-28 23:56:34,205 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 23:56:34,215 INFO L202 MainTranslator]: Completed pre-run [2023-11-28 23:56:34,227 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_b34aade3-3705-4c5b-8580-25fbaaf572f1/sv-benchmarks/c/loop-acceleration/const_1-2.c[321,334] [2023-11-28 23:56:34,229 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 23:56:34,243 INFO L206 MainTranslator]: Completed translation [2023-11-28 23:56:34,244 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:56:34 WrapperNode [2023-11-28 23:56:34,244 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-28 23:56:34,245 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-28 23:56:34,245 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-28 23:56:34,245 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-28 23:56:34,253 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:56:34" (1/1) ... [2023-11-28 23:56:34,259 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:56:34" (1/1) ... [2023-11-28 23:56:34,272 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 26 [2023-11-28 23:56:34,272 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-28 23:56:34,273 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-28 23:56:34,273 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-28 23:56:34,273 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-28 23:56:34,281 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:56:34" (1/1) ... [2023-11-28 23:56:34,281 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:56:34" (1/1) ... [2023-11-28 23:56:34,282 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:56:34" (1/1) ... [2023-11-28 23:56:34,293 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]. [2023-11-28 23:56:34,293 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:56:34" (1/1) ... [2023-11-28 23:56:34,293 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:56:34" (1/1) ... [2023-11-28 23:56:34,296 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:56:34" (1/1) ... [2023-11-28 23:56:34,299 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:56:34" (1/1) ... [2023-11-28 23:56:34,300 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:56:34" (1/1) ... [2023-11-28 23:56:34,300 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:56:34" (1/1) ... [2023-11-28 23:56:34,302 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-28 23:56:34,303 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-28 23:56:34,303 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-28 23:56:34,303 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-28 23:56:34,304 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:56:34" (1/1) ... [2023-11-28 23:56:34,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 23:56:34,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34aade3-3705-4c5b-8580-25fbaaf572f1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:56:34,333 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34aade3-3705-4c5b-8580-25fbaaf572f1/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-28 23:56:34,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34aade3-3705-4c5b-8580-25fbaaf572f1/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-28 23:56:34,367 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-28 23:56:34,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-28 23:56:34,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-28 23:56:34,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-28 23:56:34,425 INFO L241 CfgBuilder]: Building ICFG [2023-11-28 23:56:34,427 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-28 23:56:34,505 INFO L282 CfgBuilder]: Performing block encoding [2023-11-28 23:56:34,526 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-28 23:56:34,526 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-28 23:56:34,527 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:56:34 BoogieIcfgContainer [2023-11-28 23:56:34,527 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-28 23:56:34,530 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-28 23:56:34,530 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-28 23:56:34,533 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-28 23:56:34,533 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 11:56:34" (1/3) ... [2023-11-28 23:56:34,533 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3281974f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:56:34, skipping insertion in model container [2023-11-28 23:56:34,533 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:56:34" (2/3) ... [2023-11-28 23:56:34,534 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3281974f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:56:34, skipping insertion in model container [2023-11-28 23:56:34,534 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:56:34" (3/3) ... [2023-11-28 23:56:34,535 INFO L112 eAbstractionObserver]: Analyzing ICFG const_1-2.c [2023-11-28 23:56:34,550 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-28 23:56:34,551 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-28 23:56:34,589 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 23:56:34,594 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;@11246e5e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 23:56:34,595 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-28 23:56:34,598 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 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) [2023-11-28 23:56:34,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-28 23:56:34,602 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:56:34,603 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-28 23:56:34,603 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:56:34,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:56:34,608 INFO L85 PathProgramCache]: Analyzing trace with hash 56617893, now seen corresponding path program 1 times [2023-11-28 23:56:34,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:56:34,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40055909] [2023-11-28 23:56:34,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:56:34,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:56:34,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:34,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:56:34,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:56:34,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40055909] [2023-11-28 23:56:34,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40055909] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:56:34,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:56:34,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 23:56:34,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031294669] [2023-11-28 23:56:34,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:56:34,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:56:34,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:56:34,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:56:34,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:56:34,851 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 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) 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) [2023-11-28 23:56:34,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:56:34,874 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2023-11-28 23:56:34,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:56:34,877 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 [2023-11-28 23:56:34,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:56:34,884 INFO L225 Difference]: With dead ends: 15 [2023-11-28 23:56:34,884 INFO L226 Difference]: Without dead ends: 7 [2023-11-28 23:56:34,886 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 [2023-11-28 23:56:34,890 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 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 [2023-11-28 23:56:34,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 23:56:34,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2023-11-28 23:56:34,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2023-11-28 23:56:34,918 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) [2023-11-28 23:56:34,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2023-11-28 23:56:34,920 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2023-11-28 23:56:34,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:56:34,920 INFO L495 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2023-11-28 23:56:34,920 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) [2023-11-28 23:56:34,921 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2023-11-28 23:56:34,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-28 23:56:34,921 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:56:34,921 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-28 23:56:34,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-28 23:56:34,922 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:56:34,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:56:34,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1756820054, now seen corresponding path program 1 times [2023-11-28 23:56:34,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:56:34,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801093723] [2023-11-28 23:56:34,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:56:34,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:56:34,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:35,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:56:35,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:56:35,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801093723] [2023-11-28 23:56:35,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801093723] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:56:35,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591340267] [2023-11-28 23:56:35,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:56:35,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:56:35,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34aade3-3705-4c5b-8580-25fbaaf572f1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:56:35,046 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34aade3-3705-4c5b-8580-25fbaaf572f1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:56:35,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34aade3-3705-4c5b-8580-25fbaaf572f1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-28 23:56:35,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:35,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-28 23:56:35,113 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:56:35,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:56:35,141 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:56:35,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:56:35,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591340267] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:56:35,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:56:35,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-28 23:56:35,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605817481] [2023-11-28 23:56:35,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:56:35,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-28 23:56:35,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:56:35,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-28 23:56:35,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-11-28 23:56:35,176 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 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) [2023-11-28 23:56:35,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:56:35,221 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2023-11-28 23:56:35,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 23:56:35,222 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 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 6 [2023-11-28 23:56:35,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:56:35,223 INFO L225 Difference]: With dead ends: 14 [2023-11-28 23:56:35,223 INFO L226 Difference]: Without dead ends: 10 [2023-11-28 23:56:35,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2023-11-28 23:56:35,225 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 23:56:35,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 23:56:35,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2023-11-28 23:56:35,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2023-11-28 23:56:35,229 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) [2023-11-28 23:56:35,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2023-11-28 23:56:35,230 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 6 [2023-11-28 23:56:35,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:56:35,230 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2023-11-28 23:56:35,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 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) [2023-11-28 23:56:35,231 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2023-11-28 23:56:35,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-28 23:56:35,231 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:56:35,231 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2023-11-28 23:56:35,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34aade3-3705-4c5b-8580-25fbaaf572f1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-28 23:56:35,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34aade3-3705-4c5b-8580-25fbaaf572f1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:56:35,432 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:56:35,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:56:35,433 INFO L85 PathProgramCache]: Analyzing trace with hash 608473061, now seen corresponding path program 2 times [2023-11-28 23:56:35,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:56:35,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307230386] [2023-11-28 23:56:35,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:56:35,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:56:35,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:35,579 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:56:35,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:56:35,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307230386] [2023-11-28 23:56:35,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307230386] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:56:35,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469137034] [2023-11-28 23:56:35,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 23:56:35,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:56:35,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34aade3-3705-4c5b-8580-25fbaaf572f1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:56:35,584 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34aade3-3705-4c5b-8580-25fbaaf572f1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:56:35,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34aade3-3705-4c5b-8580-25fbaaf572f1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-28 23:56:35,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 23:56:35,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:56:35,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-28 23:56:35,628 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:56:35,650 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:56:35,651 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:56:35,740 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:56:35,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469137034] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:56:35,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:56:35,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-28 23:56:35,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485597675] [2023-11-28 23:56:35,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:56:35,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-28 23:56:35,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:56:35,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-28 23:56:35,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2023-11-28 23:56:35,744 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 states have internal predecessors, (17), 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) [2023-11-28 23:56:37,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:56:37,045 INFO L93 Difference]: Finished difference Result 20 states and 25 transitions. [2023-11-28 23:56:37,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-28 23:56:37,046 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 states have internal predecessors, (17), 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 [2023-11-28 23:56:37,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:56:37,047 INFO L225 Difference]: With dead ends: 20 [2023-11-28 23:56:37,047 INFO L226 Difference]: Without dead ends: 16 [2023-11-28 23:56:37,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2023-11-28 23:56:37,049 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 23:56:37,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 23:56:37,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-28 23:56:37,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-11-28 23:56:37,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:56:37,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2023-11-28 23:56:37,056 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 9 [2023-11-28 23:56:37,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:56:37,056 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2023-11-28 23:56:37,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 states have internal predecessors, (17), 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) [2023-11-28 23:56:37,057 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2023-11-28 23:56:37,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-28 23:56:37,058 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:56:37,058 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1] [2023-11-28 23:56:37,062 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34aade3-3705-4c5b-8580-25fbaaf572f1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-28 23:56:37,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34aade3-3705-4c5b-8580-25fbaaf572f1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:56:37,259 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:56:37,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:56:37,259 INFO L85 PathProgramCache]: Analyzing trace with hash -973747643, now seen corresponding path program 3 times [2023-11-28 23:56:37,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:56:37,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977851699] [2023-11-28 23:56:37,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:56:37,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:56:37,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:37,526 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:56:37,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:56:37,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977851699] [2023-11-28 23:56:37,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977851699] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:56:37,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876189525] [2023-11-28 23:56:37,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 23:56:37,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:56:37,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34aade3-3705-4c5b-8580-25fbaaf572f1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:56:37,528 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34aade3-3705-4c5b-8580-25fbaaf572f1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:56:37,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34aade3-3705-4c5b-8580-25fbaaf572f1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-28 23:56:37,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-28 23:56:37,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:56:37,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-28 23:56:37,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:56:37,632 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:56:37,632 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:56:37,949 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:56:37,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876189525] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:56:37,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:56:37,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-11-28 23:56:37,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15630571] [2023-11-28 23:56:37,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:56:37,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-28 23:56:37,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:56:37,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-28 23:56:37,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=410, Unknown=0, NotChecked=0, Total=600 [2023-11-28 23:56:37,953 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 25 states, 25 states have (on average 1.16) internal successors, (29), 24 states have internal predecessors, (29), 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) [2023-11-28 23:56:41,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:56:41,876 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2023-11-28 23:56:41,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-28 23:56:41,879 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-28 23:56:41,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:56:41,879 INFO L225 Difference]: With dead ends: 32 [2023-11-28 23:56:41,879 INFO L226 Difference]: Without dead ends: 28 [2023-11-28 23:56:41,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=440, Invalid=750, Unknown=0, NotChecked=0, Total=1190 [2023-11-28 23:56:41,881 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 23:56:41,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 23:56:41,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-28 23:56:41,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-11-28 23:56:41,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 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) [2023-11-28 23:56:41,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2023-11-28 23:56:41,887 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 15 [2023-11-28 23:56:41,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:56:41,887 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2023-11-28 23:56:41,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 24 states have internal predecessors, (29), 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) [2023-11-28 23:56:41,887 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2023-11-28 23:56:41,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-28 23:56:41,888 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:56:41,888 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1] [2023-11-28 23:56:41,894 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34aade3-3705-4c5b-8580-25fbaaf572f1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-28 23:56:42,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34aade3-3705-4c5b-8580-25fbaaf572f1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:56:42,089 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:56:42,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:56:42,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1601595141, now seen corresponding path program 4 times [2023-11-28 23:56:42,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:56:42,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392821081] [2023-11-28 23:56:42,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:56:42,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:56:42,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:42,563 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:56:42,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:56:42,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392821081] [2023-11-28 23:56:42,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392821081] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:56:42,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864237673] [2023-11-28 23:56:42,564 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-28 23:56:42,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:56:42,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34aade3-3705-4c5b-8580-25fbaaf572f1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:56:42,565 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34aade3-3705-4c5b-8580-25fbaaf572f1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:56:42,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34aade3-3705-4c5b-8580-25fbaaf572f1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-28 23:56:42,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-28 23:56:42,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:56:42,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-28 23:56:42,633 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:56:42,698 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:56:42,698 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:56:43,726 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:56:43,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864237673] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:56:43,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:56:43,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2023-11-28 23:56:43,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650958197] [2023-11-28 23:56:43,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:56:43,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-28 23:56:43,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:56:43,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-28 23:56:43,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=670, Invalid=1682, Unknown=0, NotChecked=0, Total=2352 [2023-11-28 23:56:43,732 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 48 states have internal predecessors, (53), 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) [2023-11-28 23:58:46,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:58:46,301 INFO L93 Difference]: Finished difference Result 56 states and 79 transitions. [2023-11-28 23:58:46,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-28 23:58:46,301 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 48 states have internal predecessors, (53), 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 27 [2023-11-28 23:58:46,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:58:46,302 INFO L225 Difference]: With dead ends: 56 [2023-11-28 23:58:46,302 INFO L226 Difference]: Without dead ends: 52 [2023-11-28 23:58:46,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 123.4s TimeCoverageRelationStatistics Valid=1748, Invalid=3222, Unknown=0, NotChecked=0, Total=4970 [2023-11-28 23:58:46,305 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-28 23:58:46,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 82 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-28 23:58:46,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-11-28 23:58:46,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2023-11-28 23:58:46,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 51 states have internal predecessors, (52), 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) [2023-11-28 23:58:46,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2023-11-28 23:58:46,317 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 27 [2023-11-28 23:58:46,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:58:46,317 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2023-11-28 23:58:46,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 48 states have internal predecessors, (53), 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) [2023-11-28 23:58:46,317 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2023-11-28 23:58:46,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-28 23:58:46,319 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:58:46,319 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1] [2023-11-28 23:58:46,323 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34aade3-3705-4c5b-8580-25fbaaf572f1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-28 23:58:46,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34aade3-3705-4c5b-8580-25fbaaf572f1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:58:46,520 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:58:46,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:58:46,520 INFO L85 PathProgramCache]: Analyzing trace with hash 534265989, now seen corresponding path program 5 times [2023-11-28 23:58:46,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:58:46,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129654037] [2023-11-28 23:58:46,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:58:46,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:58:46,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:58:48,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:58:48,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:58:48,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129654037] [2023-11-28 23:58:48,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129654037] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:58:48,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237449050] [2023-11-28 23:58:48,169 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-28 23:58:48,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:58:48,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34aade3-3705-4c5b-8580-25fbaaf572f1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:58:48,170 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34aade3-3705-4c5b-8580-25fbaaf572f1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:58:48,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34aade3-3705-4c5b-8580-25fbaaf572f1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 00:00:35,328 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2023-11-29 00:00:35,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:00:35,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 95 conjunts are in the unsatisfiable core [2023-11-29 00:00:35,358 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:00:35,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:00:35,480 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:00:39,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:00:39,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237449050] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:00:39,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:00:39,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2023-11-29 00:00:39,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828134655] [2023-11-29 00:00:39,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:00:39,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-11-29 00:00:39,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:00:39,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-11-29 00:00:39,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2494, Invalid=6818, Unknown=0, NotChecked=0, Total=9312 [2023-11-29 00:00:39,107 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 96 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:01:39,523 WARN L854 $PredicateComparison]: unable to prove that (and (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 13) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 24) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 33) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 14) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 12) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 40) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 42) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 38) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 23) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 41) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 29) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 18) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 22) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 19) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 36) 4294967296) 1024) (< (mod |c_ULTIMATE.start_main_~y~0#1| 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 2) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 43) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 32) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 28) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 20) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 21) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 1) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 27) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 9) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 10) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 11) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 8) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 7) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 35) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 5) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 39) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 6) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 30) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 15) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 16) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 17) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 45) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 3) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 34) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 26) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 31) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 44) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 25) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 37) 4294967296) 1024)) is different from false [2023-11-29 00:07:53,521 WARN L293 SmtUtils]: Spent 8.55s on a formula simplification. DAG size of input: 162 DAG size of output: 14 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)