./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-programs/copysome2-1.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_626500bb-462a-42e5-b835-218b580b5ddf/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626500bb-462a-42e5-b835-218b580b5ddf/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_626500bb-462a-42e5-b835-218b580b5ddf/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626500bb-462a-42e5-b835-218b580b5ddf/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-programs/copysome2-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626500bb-462a-42e5-b835-218b580b5ddf/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_626500bb-462a-42e5-b835-218b580b5ddf/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 f2acf1d88f73f9b993c11cfca399c08f166d9054c3a2d816b9c02e1296c27b35 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:06:26,061 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:06:26,143 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626500bb-462a-42e5-b835-218b580b5ddf/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 08:06:26,148 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:06:26,148 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:06:26,193 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:06:26,193 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:06:26,194 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:06:26,195 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:06:26,200 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:06:26,202 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:06:26,202 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:06:26,203 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:06:26,204 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:06:26,205 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 08:06:26,205 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:06:26,206 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:06:26,206 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:06:26,206 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:06:26,207 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 08:06:26,207 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:06:26,208 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 08:06:26,208 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:06:26,208 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 08:06:26,209 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:06:26,210 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:06:26,210 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:06:26,210 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:06:26,211 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:06:26,211 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:06:26,212 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:06:26,213 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 08:06:26,213 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:06:26,213 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:06:26,213 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:06:26,213 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 08:06:26,214 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:06:26,214 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:06:26,214 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:06:26,214 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_626500bb-462a-42e5-b835-218b580b5ddf/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626500bb-462a-42e5-b835-218b580b5ddf/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f2acf1d88f73f9b993c11cfca399c08f166d9054c3a2d816b9c02e1296c27b35 [2023-11-19 08:06:26,482 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:06:26,506 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:06:26,509 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:06:26,510 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:06:26,511 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:06:26,512 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626500bb-462a-42e5-b835-218b580b5ddf/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/array-programs/copysome2-1.i [2023-11-19 08:06:29,663 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:06:29,866 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:06:29,867 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626500bb-462a-42e5-b835-218b580b5ddf/sv-benchmarks/c/array-programs/copysome2-1.i [2023-11-19 08:06:29,878 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626500bb-462a-42e5-b835-218b580b5ddf/bin/uautomizer-verify-uCwYo4JHxu/data/4d1af1c7e/e9a1c5a84cee40048d437b1edc3352e9/FLAG7f1303984 [2023-11-19 08:06:29,896 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626500bb-462a-42e5-b835-218b580b5ddf/bin/uautomizer-verify-uCwYo4JHxu/data/4d1af1c7e/e9a1c5a84cee40048d437b1edc3352e9 [2023-11-19 08:06:29,903 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:06:29,905 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:06:29,912 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:06:29,912 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:06:29,918 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:06:29,919 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:06:29" (1/1) ... [2023-11-19 08:06:29,920 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51b7ff54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:29, skipping insertion in model container [2023-11-19 08:06:29,920 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:06:29" (1/1) ... [2023-11-19 08:06:29,947 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:06:30,146 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_626500bb-462a-42e5-b835-218b580b5ddf/sv-benchmarks/c/array-programs/copysome2-1.i[804,817] [2023-11-19 08:06:30,174 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:06:30,185 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:06:30,203 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_626500bb-462a-42e5-b835-218b580b5ddf/sv-benchmarks/c/array-programs/copysome2-1.i[804,817] [2023-11-19 08:06:30,226 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:06:30,243 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:06:30,244 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:30 WrapperNode [2023-11-19 08:06:30,244 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:06:30,246 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:06:30,246 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:06:30,246 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:06:30,254 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:30" (1/1) ... [2023-11-19 08:06:30,274 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:30" (1/1) ... [2023-11-19 08:06:30,304 INFO L138 Inliner]: procedures = 16, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 94 [2023-11-19 08:06:30,305 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:06:30,306 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:06:30,306 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:06:30,306 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:06:30,315 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:30" (1/1) ... [2023-11-19 08:06:30,316 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:30" (1/1) ... [2023-11-19 08:06:30,321 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:30" (1/1) ... [2023-11-19 08:06:30,321 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:30" (1/1) ... [2023-11-19 08:06:30,341 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:30" (1/1) ... [2023-11-19 08:06:30,345 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:30" (1/1) ... [2023-11-19 08:06:30,351 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:30" (1/1) ... [2023-11-19 08:06:30,355 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:30" (1/1) ... [2023-11-19 08:06:30,357 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:06:30,359 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:06:30,359 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:06:30,359 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:06:30,360 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:30" (1/1) ... [2023-11-19 08:06:30,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:06:30,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626500bb-462a-42e5-b835-218b580b5ddf/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:30,394 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626500bb-462a-42e5-b835-218b580b5ddf/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:30,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626500bb-462a-42e5-b835-218b580b5ddf/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:06:30,440 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:06:30,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:06:30,440 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 08:06:30,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 08:06:30,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:06:30,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:06:30,441 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 08:06:30,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 08:06:30,517 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:06:30,520 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:06:30,728 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:06:30,735 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:06:30,735 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-19 08:06:30,743 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:06:30 BoogieIcfgContainer [2023-11-19 08:06:30,743 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:06:30,746 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:06:30,747 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:06:30,751 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:06:30,751 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:06:29" (1/3) ... [2023-11-19 08:06:30,752 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36f83796 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:06:30, skipping insertion in model container [2023-11-19 08:06:30,752 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:30" (2/3) ... [2023-11-19 08:06:30,753 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36f83796 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:06:30, skipping insertion in model container [2023-11-19 08:06:30,753 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:06:30" (3/3) ... [2023-11-19 08:06:30,754 INFO L112 eAbstractionObserver]: Analyzing ICFG copysome2-1.i [2023-11-19 08:06:30,775 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:06:30,775 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 08:06:30,853 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:06:30,862 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;@5ba25a1c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:06:30,863 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 08:06:30,893 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 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 08:06:30,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-19 08:06:30,900 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:06:30,901 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:30,901 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:06:30,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:30,914 INFO L85 PathProgramCache]: Analyzing trace with hash 551047633, now seen corresponding path program 1 times [2023-11-19 08:06:30,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:30,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542981496] [2023-11-19 08:06:30,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:30,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:31,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:31,255 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 08:06:31,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:31,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542981496] [2023-11-19 08:06:31,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542981496] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:06:31,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:06:31,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:06:31,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929442992] [2023-11-19 08:06:31,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:06:31,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:06:31,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:31,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:06:31,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:06:31,298 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 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 3.6666666666666665) internal successors, (11), 3 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) [2023-11-19 08:06:31,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:06:31,368 INFO L93 Difference]: Finished difference Result 50 states and 76 transitions. [2023-11-19 08:06:31,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:06:31,371 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 11 [2023-11-19 08:06:31,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:06:31,378 INFO L225 Difference]: With dead ends: 50 [2023-11-19 08:06:31,378 INFO L226 Difference]: Without dead ends: 27 [2023-11-19 08:06:31,381 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 08:06:31,385 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 7 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:06:31,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 29 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:06:31,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-19 08:06:31,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2023-11-19 08:06:31,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 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 08:06:31,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2023-11-19 08:06:31,420 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 11 [2023-11-19 08:06:31,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:06:31,420 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2023-11-19 08:06:31,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2023-11-19 08:06:31,421 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2023-11-19 08:06:31,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-19 08:06:31,422 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:06:31,422 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:31,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 08:06:31,423 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:06:31,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:31,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1141073570, now seen corresponding path program 1 times [2023-11-19 08:06:31,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:31,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37414133] [2023-11-19 08:06:31,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:31,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:31,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:31,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 08:06:31,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:31,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37414133] [2023-11-19 08:06:31,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37414133] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:31,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227407007] [2023-11-19 08:06:31,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:31,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:31,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626500bb-462a-42e5-b835-218b580b5ddf/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:31,625 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626500bb-462a-42e5-b835-218b580b5ddf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:31,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626500bb-462a-42e5-b835-218b580b5ddf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 08:06:31,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:31,739 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 08:06:31,745 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:31,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 08:06:31,788 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:06:31,816 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 08:06:31,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227407007] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:06:31,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:06:31,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-19 08:06:31,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574922871] [2023-11-19 08:06:31,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:06:31,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 08:06:31,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:31,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 08:06:31,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:06:31,821 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:31,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:06:31,941 INFO L93 Difference]: Finished difference Result 63 states and 87 transitions. [2023-11-19 08:06:31,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 08:06:31,942 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-19 08:06:31,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:06:31,943 INFO L225 Difference]: With dead ends: 63 [2023-11-19 08:06:31,943 INFO L226 Difference]: Without dead ends: 46 [2023-11-19 08:06:31,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 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 08:06:31,946 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 32 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:06:31,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 46 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:06:31,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-19 08:06:31,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2023-11-19 08:06:31,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 45 states have internal predecessors, (57), 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 08:06:31,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2023-11-19 08:06:31,956 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 19 [2023-11-19 08:06:31,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:06:31,956 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2023-11-19 08:06:31,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:31,957 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2023-11-19 08:06:31,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-19 08:06:31,959 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:06:31,959 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:31,979 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626500bb-462a-42e5-b835-218b580b5ddf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 08:06:32,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626500bb-462a-42e5-b835-218b580b5ddf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:32,180 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:06:32,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:32,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1011418317, now seen corresponding path program 2 times [2023-11-19 08:06:32,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:32,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759458262] [2023-11-19 08:06:32,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:32,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:32,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:32,415 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-11-19 08:06:32,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:32,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759458262] [2023-11-19 08:06:32,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759458262] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:06:32,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:06:32,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 08:06:32,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810780900] [2023-11-19 08:06:32,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:06:32,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:06:32,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:32,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:06:32,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:06:32,419 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:32,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:06:32,464 INFO L93 Difference]: Finished difference Result 78 states and 98 transitions. [2023-11-19 08:06:32,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:06:32,464 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-11-19 08:06:32,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:06:32,466 INFO L225 Difference]: With dead ends: 78 [2023-11-19 08:06:32,466 INFO L226 Difference]: Without dead ends: 46 [2023-11-19 08:06:32,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:06:32,468 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 19 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:06:32,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 22 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:06:32,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-19 08:06:32,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2023-11-19 08:06:32,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 45 states have internal predecessors, (55), 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 08:06:32,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2023-11-19 08:06:32,478 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 43 [2023-11-19 08:06:32,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:06:32,478 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2023-11-19 08:06:32,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:32,479 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2023-11-19 08:06:32,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-19 08:06:32,480 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:06:32,481 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:32,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 08:06:32,481 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:06:32,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:32,482 INFO L85 PathProgramCache]: Analyzing trace with hash 9650037, now seen corresponding path program 1 times [2023-11-19 08:06:32,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:32,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149018171] [2023-11-19 08:06:32,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:32,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:32,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:32,672 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-11-19 08:06:32,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:32,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149018171] [2023-11-19 08:06:32,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149018171] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:32,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500613211] [2023-11-19 08:06:32,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:32,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:32,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626500bb-462a-42e5-b835-218b580b5ddf/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:32,675 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626500bb-462a-42e5-b835-218b580b5ddf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:32,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626500bb-462a-42e5-b835-218b580b5ddf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 08:06:32,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:32,809 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 08:06:32,819 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:32,901 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-19 08:06:32,902 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:06:32,978 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-19 08:06:32,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500613211] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:06:32,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:06:32,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2023-11-19 08:06:32,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984139244] [2023-11-19 08:06:32,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:06:32,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 08:06:32,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:32,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 08:06:32,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2023-11-19 08:06:32,982 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 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) [2023-11-19 08:06:33,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:06:33,397 INFO L93 Difference]: Finished difference Result 145 states and 202 transitions. [2023-11-19 08:06:33,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-19 08:06:33,398 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 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 43 [2023-11-19 08:06:33,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:06:33,401 INFO L225 Difference]: With dead ends: 145 [2023-11-19 08:06:33,401 INFO L226 Difference]: Without dead ends: 110 [2023-11-19 08:06:33,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2023-11-19 08:06:33,404 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 144 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 08:06:33,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 39 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 08:06:33,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-11-19 08:06:33,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2023-11-19 08:06:33,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.238532110091743) internal successors, (135), 109 states have internal predecessors, (135), 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 08:06:33,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 135 transitions. [2023-11-19 08:06:33,423 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 135 transitions. Word has length 43 [2023-11-19 08:06:33,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:06:33,424 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 135 transitions. [2023-11-19 08:06:33,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 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) [2023-11-19 08:06:33,424 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 135 transitions. [2023-11-19 08:06:33,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-11-19 08:06:33,428 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:06:33,428 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:33,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626500bb-462a-42e5-b835-218b580b5ddf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:33,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626500bb-462a-42e5-b835-218b580b5ddf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:33,638 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:06:33,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:33,640 INFO L85 PathProgramCache]: Analyzing trace with hash 762574501, now seen corresponding path program 2 times [2023-11-19 08:06:33,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:33,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7585473] [2023-11-19 08:06:33,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:33,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:33,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:34,580 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-19 08:06:34,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:34,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7585473] [2023-11-19 08:06:34,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7585473] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:34,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018033908] [2023-11-19 08:06:34,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 08:06:34,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:34,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626500bb-462a-42e5-b835-218b580b5ddf/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:34,590 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626500bb-462a-42e5-b835-218b580b5ddf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:34,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626500bb-462a-42e5-b835-218b580b5ddf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 08:06:34,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 08:06:34,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:06:34,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 08:06:34,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:34,957 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-19 08:06:34,958 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:06:35,331 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-19 08:06:35,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018033908] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:06:35,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:06:35,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2023-11-19 08:06:35,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457737085] [2023-11-19 08:06:35,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:06:35,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-19 08:06:35,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:35,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-19 08:06:35,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2023-11-19 08:06:35,336 INFO L87 Difference]: Start difference. First operand 110 states and 135 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 29 states have internal predecessors, (71), 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 08:06:36,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:06:36,004 INFO L93 Difference]: Finished difference Result 895 states and 1184 transitions. [2023-11-19 08:06:36,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-19 08:06:36,005 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 29 states have internal predecessors, (71), 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 107 [2023-11-19 08:06:36,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:06:36,011 INFO L225 Difference]: With dead ends: 895 [2023-11-19 08:06:36,011 INFO L226 Difference]: Without dead ends: 812 [2023-11-19 08:06:36,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2023-11-19 08:06:36,014 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 530 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 08:06:36,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [530 Valid, 30 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 08:06:36,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2023-11-19 08:06:36,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 222. [2023-11-19 08:06:36,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 1.244343891402715) internal successors, (275), 221 states have internal predecessors, (275), 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 08:06:36,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 275 transitions. [2023-11-19 08:06:36,061 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 275 transitions. Word has length 107 [2023-11-19 08:06:36,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:06:36,062 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 275 transitions. [2023-11-19 08:06:36,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 29 states have internal predecessors, (71), 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 08:06:36,062 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 275 transitions. [2023-11-19 08:06:36,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2023-11-19 08:06:36,066 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:06:36,066 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 19, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:36,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626500bb-462a-42e5-b835-218b580b5ddf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:36,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626500bb-462a-42e5-b835-218b580b5ddf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:36,287 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:06:36,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:36,287 INFO L85 PathProgramCache]: Analyzing trace with hash 518233129, now seen corresponding path program 3 times [2023-11-19 08:06:36,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:36,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330055781] [2023-11-19 08:06:36,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:36,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:36,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:38,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2678 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 2002 trivial. 0 not checked. [2023-11-19 08:06:38,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:38,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330055781] [2023-11-19 08:06:38,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330055781] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:38,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161501315] [2023-11-19 08:06:38,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 08:06:38,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:38,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626500bb-462a-42e5-b835-218b580b5ddf/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:38,503 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626500bb-462a-42e5-b835-218b580b5ddf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:38,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626500bb-462a-42e5-b835-218b580b5ddf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 08:06:39,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-19 08:06:39,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:06:39,102 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 08:06:39,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:39,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2678 backedges. 123 proven. 2 refuted. 0 times theorem prover too weak. 2553 trivial. 0 not checked. [2023-11-19 08:06:39,352 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:06:39,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2678 backedges. 123 proven. 2 refuted. 0 times theorem prover too weak. 2553 trivial. 0 not checked. [2023-11-19 08:06:39,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161501315] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:06:39,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:06:39,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 5, 5] total 35 [2023-11-19 08:06:39,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486828036] [2023-11-19 08:06:39,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:06:39,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-19 08:06:39,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:39,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-19 08:06:39,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=709, Unknown=0, NotChecked=0, Total=1190 [2023-11-19 08:06:39,596 INFO L87 Difference]: Start difference. First operand 222 states and 275 transitions. Second operand has 35 states, 35 states have (on average 2.857142857142857) internal successors, (100), 35 states have internal predecessors, (100), 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 08:06:40,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:06:40,837 INFO L93 Difference]: Finished difference Result 470 states and 602 transitions. [2023-11-19 08:06:40,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-19 08:06:40,838 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.857142857142857) internal successors, (100), 35 states have internal predecessors, (100), 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 219 [2023-11-19 08:06:40,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:06:40,840 INFO L225 Difference]: With dead ends: 470 [2023-11-19 08:06:40,840 INFO L226 Difference]: Without dead ends: 303 [2023-11-19 08:06:40,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 432 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1434, Invalid=2472, Unknown=0, NotChecked=0, Total=3906 [2023-11-19 08:06:40,844 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 674 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 674 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 08:06:40,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [674 Valid, 60 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 08:06:40,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2023-11-19 08:06:40,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 278. [2023-11-19 08:06:40,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 1.0722021660649819) internal successors, (297), 277 states have internal predecessors, (297), 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 08:06:40,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 297 transitions. [2023-11-19 08:06:40,877 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 297 transitions. Word has length 219 [2023-11-19 08:06:40,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:06:40,878 INFO L495 AbstractCegarLoop]: Abstraction has 278 states and 297 transitions. [2023-11-19 08:06:40,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.857142857142857) internal successors, (100), 35 states have internal predecessors, (100), 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 08:06:40,878 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 297 transitions. [2023-11-19 08:06:40,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2023-11-19 08:06:40,882 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:06:40,883 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:40,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626500bb-462a-42e5-b835-218b580b5ddf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:41,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626500bb-462a-42e5-b835-218b580b5ddf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 08:06:41,105 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:06:41,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:41,106 INFO L85 PathProgramCache]: Analyzing trace with hash 87947340, now seen corresponding path program 1 times [2023-11-19 08:06:41,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:41,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835003873] [2023-11-19 08:06:41,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:41,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:41,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:42,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2889 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 2160 trivial. 0 not checked. [2023-11-19 08:06:42,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:42,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835003873] [2023-11-19 08:06:42,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835003873] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:42,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483757121] [2023-11-19 08:06:42,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:42,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:42,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626500bb-462a-42e5-b835-218b580b5ddf/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:42,830 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626500bb-462a-42e5-b835-218b580b5ddf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:42,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626500bb-462a-42e5-b835-218b580b5ddf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 08:06:43,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:43,212 INFO L262 TraceCheckSpWp]: Trace formula consists of 1019 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-19 08:06:43,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:43,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2889 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 2160 trivial. 0 not checked. [2023-11-19 08:06:43,311 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:06:44,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2889 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 2160 trivial. 0 not checked. [2023-11-19 08:06:44,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483757121] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:06:44,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:06:44,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 59 [2023-11-19 08:06:44,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879886100] [2023-11-19 08:06:44,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:06:44,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-11-19 08:06:44,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:44,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-11-19 08:06:44,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2023-11-19 08:06:44,596 INFO L87 Difference]: Start difference. First operand 278 states and 297 transitions. Second operand has 59 states, 59 states have (on average 2.2033898305084745) internal successors, (130), 59 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:46,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:06:46,126 INFO L93 Difference]: Finished difference Result 1511 states and 1913 transitions. [2023-11-19 08:06:46,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-11-19 08:06:46,127 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.2033898305084745) internal successors, (130), 59 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 227 [2023-11-19 08:06:46,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:06:46,135 INFO L225 Difference]: With dead ends: 1511 [2023-11-19 08:06:46,135 INFO L226 Difference]: Without dead ends: 1290 [2023-11-19 08:06:46,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 425 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2023-11-19 08:06:46,139 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 782 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 388 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 782 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 388 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 08:06:46,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [782 Valid, 86 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [388 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 08:06:46,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1290 states. [2023-11-19 08:06:46,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1290 to 462. [2023-11-19 08:06:46,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 1.1258134490238612) internal successors, (519), 461 states have internal predecessors, (519), 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 08:06:46,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 519 transitions. [2023-11-19 08:06:46,213 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 519 transitions. Word has length 227 [2023-11-19 08:06:46,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:06:46,214 INFO L495 AbstractCegarLoop]: Abstraction has 462 states and 519 transitions. [2023-11-19 08:06:46,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.2033898305084745) internal successors, (130), 59 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:06:46,215 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 519 transitions. [2023-11-19 08:06:46,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2023-11-19 08:06:46,225 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:06:46,225 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 56, 56, 56, 56, 35, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:46,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626500bb-462a-42e5-b835-218b580b5ddf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:46,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626500bb-462a-42e5-b835-218b580b5ddf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 08:06:46,441 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:06:46,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:46,442 INFO L85 PathProgramCache]: Analyzing trace with hash 533193997, now seen corresponding path program 4 times [2023-11-19 08:06:46,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:46,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853069976] [2023-11-19 08:06:46,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:46,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:46,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:52,801 INFO L134 CoverageAnalysis]: Checked inductivity of 12488 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 9352 trivial. 0 not checked. [2023-11-19 08:06:52,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:52,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853069976] [2023-11-19 08:06:52,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853069976] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:52,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991395235] [2023-11-19 08:06:52,802 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 08:06:52,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:52,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626500bb-462a-42e5-b835-218b580b5ddf/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:52,806 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626500bb-462a-42e5-b835-218b580b5ddf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:52,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626500bb-462a-42e5-b835-218b580b5ddf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 08:06:53,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 08:06:53,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:06:53,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 928 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 08:06:53,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:53,537 INFO L134 CoverageAnalysis]: Checked inductivity of 12488 backedges. 2450 proven. 0 refuted. 0 times theorem prover too weak. 10038 trivial. 0 not checked. [2023-11-19 08:06:53,537 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:06:53,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991395235] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:06:53,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 08:06:53,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [59] total 61 [2023-11-19 08:06:53,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509702658] [2023-11-19 08:06:53,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:06:53,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:06:53,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:53,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:06:53,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1716, Invalid=1944, Unknown=0, NotChecked=0, Total=3660 [2023-11-19 08:06:53,542 INFO L87 Difference]: Start difference. First operand 462 states and 519 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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 08:06:53,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:06:53,720 INFO L93 Difference]: Finished difference Result 924 states and 1089 transitions. [2023-11-19 08:06:53,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:06:53,721 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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 459 [2023-11-19 08:06:53,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:06:53,727 INFO L225 Difference]: With dead ends: 924 [2023-11-19 08:06:53,727 INFO L226 Difference]: Without dead ends: 670 [2023-11-19 08:06:53,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 458 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1716, Invalid=1944, Unknown=0, NotChecked=0, Total=3660 [2023-11-19 08:06:53,731 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 24 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:06:53,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 32 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:06:53,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2023-11-19 08:06:53,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 622. [2023-11-19 08:06:53,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 621 states have (on average 1.0966183574879227) internal successors, (681), 621 states have internal predecessors, (681), 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 08:06:53,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 681 transitions. [2023-11-19 08:06:53,853 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 681 transitions. Word has length 459 [2023-11-19 08:06:53,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:06:53,855 INFO L495 AbstractCegarLoop]: Abstraction has 622 states and 681 transitions. [2023-11-19 08:06:53,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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 08:06:53,856 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 681 transitions. [2023-11-19 08:06:53,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2023-11-19 08:06:53,868 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:06:53,869 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 56, 56, 56, 56, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:53,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626500bb-462a-42e5-b835-218b580b5ddf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:54,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626500bb-462a-42e5-b835-218b580b5ddf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:54,086 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:06:54,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:54,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1635541619, now seen corresponding path program 5 times [2023-11-19 08:06:54,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:54,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432726518] [2023-11-19 08:06:54,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:54,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:54,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:59,204 INFO L134 CoverageAnalysis]: Checked inductivity of 12488 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 9352 trivial. 0 not checked. [2023-11-19 08:06:59,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:59,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432726518] [2023-11-19 08:06:59,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432726518] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:59,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805461322] [2023-11-19 08:06:59,205 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 08:06:59,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:59,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626500bb-462a-42e5-b835-218b580b5ddf/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:59,206 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626500bb-462a-42e5-b835-218b580b5ddf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:59,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626500bb-462a-42e5-b835-218b580b5ddf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process