./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_init5_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_45001e85-6970-4a36-adec-ba42d6a1583f/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45001e85-6970-4a36-adec-ba42d6a1583f/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45001e85-6970-4a36-adec-ba42d6a1583f/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45001e85-6970-4a36-adec-ba42d6a1583f/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/standard_init5_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45001e85-6970-4a36-adec-ba42d6a1583f/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45001e85-6970-4a36-adec-ba42d6a1583f/bin/uautomizer-verify-uCwYo4JHxu --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 a4846ac0596361a9114a94843302c8ab94d86ee4373eaf89126c12ed566c8536 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:03:22,737 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:03:22,868 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45001e85-6970-4a36-adec-ba42d6a1583f/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 08:03:22,872 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:03:22,873 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:03:22,939 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:03:22,940 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:03:22,941 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:03:22,942 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:03:22,946 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:03:22,948 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:03:22,948 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:03:22,949 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:03:22,950 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:03:22,951 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 08:03:22,951 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:03:22,952 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:03:22,952 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:03:22,953 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:03:22,953 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 08:03:22,953 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:03:22,954 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 08:03:22,955 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:03:22,955 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 08:03:22,955 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:03:22,956 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:03:22,957 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:03:22,957 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:03:22,958 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:03:22,958 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:03:22,959 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:03:22,960 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 08:03:22,960 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:03:22,960 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:03:22,961 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:03:22,961 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 08:03:22,961 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:03:22,961 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:03:22,962 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:03:22,962 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_45001e85-6970-4a36-adec-ba42d6a1583f/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45001e85-6970-4a36-adec-ba42d6a1583f/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a4846ac0596361a9114a94843302c8ab94d86ee4373eaf89126c12ed566c8536 [2023-11-19 08:03:23,362 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:03:23,396 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:03:23,398 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:03:23,400 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:03:23,401 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:03:23,402 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45001e85-6970-4a36-adec-ba42d6a1583f/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/array-examples/standard_init5_ground-2.i [2023-11-19 08:03:26,405 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:03:26,659 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:03:26,660 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45001e85-6970-4a36-adec-ba42d6a1583f/sv-benchmarks/c/array-examples/standard_init5_ground-2.i [2023-11-19 08:03:26,668 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45001e85-6970-4a36-adec-ba42d6a1583f/bin/uautomizer-verify-uCwYo4JHxu/data/928ee6136/65b10d6c12cd4ddda73bb9d05f2bb8d2/FLAG64706153a [2023-11-19 08:03:26,687 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45001e85-6970-4a36-adec-ba42d6a1583f/bin/uautomizer-verify-uCwYo4JHxu/data/928ee6136/65b10d6c12cd4ddda73bb9d05f2bb8d2 [2023-11-19 08:03:26,694 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:03:26,696 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:03:26,700 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:03:26,700 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:03:26,705 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:03:26,706 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:03:26" (1/1) ... [2023-11-19 08:03:26,707 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59969f9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:26, skipping insertion in model container [2023-11-19 08:03:26,707 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:03:26" (1/1) ... [2023-11-19 08:03:26,733 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:03:26,916 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_45001e85-6970-4a36-adec-ba42d6a1583f/sv-benchmarks/c/array-examples/standard_init5_ground-2.i[816,829] [2023-11-19 08:03:26,941 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:03:26,951 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:03:26,963 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_45001e85-6970-4a36-adec-ba42d6a1583f/sv-benchmarks/c/array-examples/standard_init5_ground-2.i[816,829] [2023-11-19 08:03:26,971 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:03:26,987 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:03:26,987 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:26 WrapperNode [2023-11-19 08:03:26,988 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:03:26,989 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:03:26,989 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:03:26,989 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:03:26,997 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:26" (1/1) ... [2023-11-19 08:03:27,005 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:26" (1/1) ... [2023-11-19 08:03:27,024 INFO L138 Inliner]: procedures = 15, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2023-11-19 08:03:27,025 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:03:27,026 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:03:27,026 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:03:27,026 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:03:27,035 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:26" (1/1) ... [2023-11-19 08:03:27,036 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:26" (1/1) ... [2023-11-19 08:03:27,037 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:26" (1/1) ... [2023-11-19 08:03:27,038 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:26" (1/1) ... [2023-11-19 08:03:27,043 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:26" (1/1) ... [2023-11-19 08:03:27,047 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:26" (1/1) ... [2023-11-19 08:03:27,048 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:26" (1/1) ... [2023-11-19 08:03:27,049 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:26" (1/1) ... [2023-11-19 08:03:27,063 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:03:27,064 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:03:27,064 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:03:27,065 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:03:27,065 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:26" (1/1) ... [2023-11-19 08:03:27,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:03:27,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45001e85-6970-4a36-adec-ba42d6a1583f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:03:27,102 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45001e85-6970-4a36-adec-ba42d6a1583f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:03:27,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45001e85-6970-4a36-adec-ba42d6a1583f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:03:27,152 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:03:27,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:03:27,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 08:03:27,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 08:03:27,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:03:27,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:03:27,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 08:03:27,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 08:03:27,228 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:03:27,230 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:03:27,460 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:03:27,467 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:03:27,468 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-19 08:03:27,471 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:03:27 BoogieIcfgContainer [2023-11-19 08:03:27,471 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:03:27,473 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:03:27,474 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:03:27,477 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:03:27,478 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:03:26" (1/3) ... [2023-11-19 08:03:27,479 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11150178 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:03:27, skipping insertion in model container [2023-11-19 08:03:27,479 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:26" (2/3) ... [2023-11-19 08:03:27,479 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11150178 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:03:27, skipping insertion in model container [2023-11-19 08:03:27,479 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:03:27" (3/3) ... [2023-11-19 08:03:27,481 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_init5_ground-2.i [2023-11-19 08:03:27,500 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:03:27,500 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 08:03:27,567 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:03:27,575 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;@51bebe69, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:03:27,576 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 08:03:27,580 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.7) internal successors, (34), 21 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) [2023-11-19 08:03:27,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-19 08:03:27,587 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:03:27,587 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:03:27,588 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:03:27,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:27,594 INFO L85 PathProgramCache]: Analyzing trace with hash 846254768, now seen corresponding path program 1 times [2023-11-19 08:03:27,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:27,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936405088] [2023-11-19 08:03:27,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:27,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:27,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:27,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:27,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:27,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936405088] [2023-11-19 08:03:27,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936405088] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:27,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:03:27,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:03:27,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112269339] [2023-11-19 08:03:27,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:27,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:03:27,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:27,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:03:27,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:03:27,875 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.7) internal successors, (34), 21 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) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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) [2023-11-19 08:03:27,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:03:27,937 INFO L93 Difference]: Finished difference Result 46 states and 78 transitions. [2023-11-19 08:03:27,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:03:27,940 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 [2023-11-19 08:03:27,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:03:27,948 INFO L225 Difference]: With dead ends: 46 [2023-11-19 08:03:27,948 INFO L226 Difference]: Without dead ends: 23 [2023-11-19 08:03:27,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:03:27,955 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:03:27,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:03:27,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-19 08:03:27,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-19 08:03:27,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 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) [2023-11-19 08:03:27,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2023-11-19 08:03:27,994 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 15 [2023-11-19 08:03:27,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:03:27,995 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2023-11-19 08:03:27,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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) [2023-11-19 08:03:27,995 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2023-11-19 08:03:27,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-19 08:03:27,996 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:03:27,996 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:03:27,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 08:03:27,997 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:03:27,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:27,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1299919835, now seen corresponding path program 1 times [2023-11-19 08:03:27,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:27,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376318841] [2023-11-19 08:03:27,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:27,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:28,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:28,141 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 08:03:28,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:28,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376318841] [2023-11-19 08:03:28,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376318841] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:03:28,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208273035] [2023-11-19 08:03:28,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:28,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:28,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45001e85-6970-4a36-adec-ba42d6a1583f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:03:28,145 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45001e85-6970-4a36-adec-ba42d6a1583f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:03:28,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45001e85-6970-4a36-adec-ba42d6a1583f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 08:03:28,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:28,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 08:03:28,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:03:28,321 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 08:03:28,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:03:28,368 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 08:03:28,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208273035] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:03:28,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:03:28,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-19 08:03:28,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408956306] [2023-11-19 08:03:28,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:03:28,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 08:03:28,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:28,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 08:03:28,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:03:28,381 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 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) [2023-11-19 08:03:28,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:03:28,506 INFO L93 Difference]: Finished difference Result 57 states and 81 transitions. [2023-11-19 08:03:28,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 08:03:28,507 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 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 20 [2023-11-19 08:03:28,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:03:28,508 INFO L225 Difference]: With dead ends: 57 [2023-11-19 08:03:28,508 INFO L226 Difference]: Without dead ends: 38 [2023-11-19 08:03:28,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:03:28,511 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:03:28,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:03:28,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-19 08:03:28,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-11-19 08:03:28,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.162162162162162) internal successors, (43), 37 states have internal predecessors, (43), 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) [2023-11-19 08:03:28,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2023-11-19 08:03:28,521 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 20 [2023-11-19 08:03:28,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:03:28,522 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2023-11-19 08:03:28,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 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) [2023-11-19 08:03:28,523 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2023-11-19 08:03:28,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-19 08:03:28,524 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:03:28,524 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:03:28,550 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45001e85-6970-4a36-adec-ba42d6a1583f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 08:03:28,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45001e85-6970-4a36-adec-ba42d6a1583f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:28,741 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:03:28,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:28,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1604238356, now seen corresponding path program 2 times [2023-11-19 08:03:28,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:28,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021914592] [2023-11-19 08:03:28,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:28,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:28,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:29,091 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-19 08:03:29,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:29,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021914592] [2023-11-19 08:03:29,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021914592] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:03:29,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048714893] [2023-11-19 08:03:29,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 08:03:29,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:29,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45001e85-6970-4a36-adec-ba42d6a1583f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:03:29,125 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45001e85-6970-4a36-adec-ba42d6a1583f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:03:29,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45001e85-6970-4a36-adec-ba42d6a1583f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 08:03:29,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 08:03:29,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:03:29,248 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 08:03:29,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:03:29,302 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-19 08:03:29,303 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:03:29,387 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-19 08:03:29,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048714893] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:03:29,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:03:29,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-19 08:03:29,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060612462] [2023-11-19 08:03:29,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:03:29,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 08:03:29,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:29,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 08:03:29,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-19 08:03:29,399 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:29,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:03:29,606 INFO L93 Difference]: Finished difference Result 99 states and 138 transitions. [2023-11-19 08:03:29,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 08:03:29,606 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-11-19 08:03:29,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:03:29,608 INFO L225 Difference]: With dead ends: 99 [2023-11-19 08:03:29,608 INFO L226 Difference]: Without dead ends: 68 [2023-11-19 08:03:29,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-19 08:03:29,613 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:03:29,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 58 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:03:29,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-11-19 08:03:29,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2023-11-19 08:03:29,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 67 states have internal predecessors, (73), 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) [2023-11-19 08:03:29,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2023-11-19 08:03:29,630 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 35 [2023-11-19 08:03:29,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:03:29,630 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2023-11-19 08:03:29,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:29,631 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2023-11-19 08:03:29,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-19 08:03:29,633 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:03:29,633 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:03:29,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45001e85-6970-4a36-adec-ba42d6a1583f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 08:03:29,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45001e85-6970-4a36-adec-ba42d6a1583f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:29,849 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:03:29,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:29,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1605603020, now seen corresponding path program 3 times [2023-11-19 08:03:29,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:29,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164223864] [2023-11-19 08:03:29,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:29,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:29,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:30,466 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-11-19 08:03:30,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:30,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164223864] [2023-11-19 08:03:30,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164223864] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:03:30,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613075401] [2023-11-19 08:03:30,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 08:03:30,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:30,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45001e85-6970-4a36-adec-ba42d6a1583f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:03:30,477 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45001e85-6970-4a36-adec-ba42d6a1583f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:03:30,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45001e85-6970-4a36-adec-ba42d6a1583f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 08:03:32,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-19 08:03:32,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:03:32,444 INFO L262 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 08:03:32,448 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:03:32,530 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2023-11-19 08:03:32,536 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:03:32,842 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2023-11-19 08:03:32,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613075401] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:03:32,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:03:32,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 26 [2023-11-19 08:03:32,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192826037] [2023-11-19 08:03:32,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:03:32,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-19 08:03:32,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:32,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-19 08:03:32,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2023-11-19 08:03:32,847 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 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) [2023-11-19 08:03:33,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:03:33,185 INFO L93 Difference]: Finished difference Result 183 states and 252 transitions. [2023-11-19 08:03:33,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-19 08:03:33,190 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 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 [2023-11-19 08:03:33,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:03:33,196 INFO L225 Difference]: With dead ends: 183 [2023-11-19 08:03:33,196 INFO L226 Difference]: Without dead ends: 128 [2023-11-19 08:03:33,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2023-11-19 08:03:33,200 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 08:03:33,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 38 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 08:03:33,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-11-19 08:03:33,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2023-11-19 08:03:33,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.047244094488189) internal successors, (133), 127 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) [2023-11-19 08:03:33,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 133 transitions. [2023-11-19 08:03:33,237 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 133 transitions. Word has length 65 [2023-11-19 08:03:33,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:03:33,237 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 133 transitions. [2023-11-19 08:03:33,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 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) [2023-11-19 08:03:33,238 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 133 transitions. [2023-11-19 08:03:33,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-11-19 08:03:33,239 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:03:33,240 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:03:33,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45001e85-6970-4a36-adec-ba42d6a1583f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 08:03:33,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45001e85-6970-4a36-adec-ba42d6a1583f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:33,473 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:03:33,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:33,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1233939596, now seen corresponding path program 4 times [2023-11-19 08:03:33,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:33,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084499176] [2023-11-19 08:03:33,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:33,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:33,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:34,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2023-11-19 08:03:34,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:34,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084499176] [2023-11-19 08:03:34,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084499176] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:03:34,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919783286] [2023-11-19 08:03:34,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 08:03:34,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:34,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45001e85-6970-4a36-adec-ba42d6a1583f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:03:34,913 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45001e85-6970-4a36-adec-ba42d6a1583f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:03:34,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45001e85-6970-4a36-adec-ba42d6a1583f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 08:03:35,175 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 08:03:35,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:03:35,180 INFO L262 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-19 08:03:35,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:03:35,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2023-11-19 08:03:35,250 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:03:36,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2023-11-19 08:03:36,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919783286] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:03:36,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:03:36,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2023-11-19 08:03:36,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664028387] [2023-11-19 08:03:36,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:03:36,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-19 08:03:36,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:36,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-19 08:03:36,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-11-19 08:03:36,160 INFO L87 Difference]: Start difference. First operand 128 states and 133 transitions. Second operand has 49 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 49 states have internal predecessors, (67), 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) [2023-11-19 08:03:37,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:03:37,071 INFO L93 Difference]: Finished difference Result 351 states and 480 transitions. [2023-11-19 08:03:37,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-19 08:03:37,073 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 49 states have internal predecessors, (67), 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 125 [2023-11-19 08:03:37,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:03:37,077 INFO L225 Difference]: With dead ends: 351 [2023-11-19 08:03:37,077 INFO L226 Difference]: Without dead ends: 248 [2023-11-19 08:03:37,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-11-19 08:03:37,085 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 681 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 681 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 08:03:37,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [681 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 08:03:37,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2023-11-19 08:03:37,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 248. [2023-11-19 08:03:37,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.0242914979757085) internal successors, (253), 247 states have internal predecessors, (253), 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) [2023-11-19 08:03:37,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 253 transitions. [2023-11-19 08:03:37,119 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 253 transitions. Word has length 125 [2023-11-19 08:03:37,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:03:37,120 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 253 transitions. [2023-11-19 08:03:37,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 49 states have internal predecessors, (67), 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) [2023-11-19 08:03:37,120 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 253 transitions. [2023-11-19 08:03:37,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2023-11-19 08:03:37,124 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:03:37,125 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:03:37,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45001e85-6970-4a36-adec-ba42d6a1583f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 08:03:37,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45001e85-6970-4a36-adec-ba42d6a1583f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:37,325 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:03:37,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:37,326 INFO L85 PathProgramCache]: Analyzing trace with hash 428296204, now seen corresponding path program 5 times [2023-11-19 08:03:37,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:37,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203347719] [2023-11-19 08:03:37,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:37,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:37,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:41,651 INFO L134 CoverageAnalysis]: Checked inductivity of 5405 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2023-11-19 08:03:41,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:41,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203347719] [2023-11-19 08:03:41,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203347719] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:03:41,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61413294] [2023-11-19 08:03:41,652 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 08:03:41,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:41,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45001e85-6970-4a36-adec-ba42d6a1583f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:03:41,654 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45001e85-6970-4a36-adec-ba42d6a1583f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:03:41,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45001e85-6970-4a36-adec-ba42d6a1583f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process