./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/iftelse.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_3a59c9f8-b261-42d1-b03a-fa765e0bcd9b/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a59c9f8-b261-42d1-b03a-fa765e0bcd9b/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a59c9f8-b261-42d1-b03a-fa765e0bcd9b/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a59c9f8-b261-42d1-b03a-fa765e0bcd9b/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/iftelse.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a59c9f8-b261-42d1-b03a-fa765e0bcd9b/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a59c9f8-b261-42d1-b03a-fa765e0bcd9b/bin/uautomizer-verify-uTZkv6EMXl --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 a98f1431f10d7e60a67a648eec648b7f5eb5616fa0d511e794bbda916609379b --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:30:08,912 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:30:09,026 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a59c9f8-b261-42d1-b03a-fa765e0bcd9b/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:30:09,033 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:30:09,035 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:30:09,065 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:30:09,066 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:30:09,067 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:30:09,068 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:30:09,072 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:30:09,073 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:30:09,074 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:30:09,074 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:30:09,076 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:30:09,076 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:30:09,077 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:30:09,077 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:30:09,077 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:30:09,078 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:30:09,078 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:30:09,079 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:30:09,079 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:30:09,081 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:30:09,081 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:30:09,082 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:30:09,083 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:30:09,083 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:30:09,084 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:30:09,084 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:30:09,085 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:30:09,086 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:30:09,086 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:30:09,086 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:30:09,087 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:30:09,087 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:30:09,087 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:30:09,087 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:30:09,088 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:30:09,088 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:30:09,088 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_3a59c9f8-b261-42d1-b03a-fa765e0bcd9b/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a59c9f8-b261-42d1-b03a-fa765e0bcd9b/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a98f1431f10d7e60a67a648eec648b7f5eb5616fa0d511e794bbda916609379b [2023-11-12 02:30:09,426 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:30:09,464 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:30:09,467 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:30:09,469 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:30:09,469 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:30:09,471 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a59c9f8-b261-42d1-b03a-fa765e0bcd9b/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/loops-crafted-1/iftelse.c [2023-11-12 02:30:12,556 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:30:12,878 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:30:12,878 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a59c9f8-b261-42d1-b03a-fa765e0bcd9b/sv-benchmarks/c/loops-crafted-1/iftelse.c [2023-11-12 02:30:12,888 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a59c9f8-b261-42d1-b03a-fa765e0bcd9b/bin/uautomizer-verify-uTZkv6EMXl/data/8367540e6/5199963bd90f4105b5124a34f92d582b/FLAG2f3fd64cd [2023-11-12 02:30:12,906 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a59c9f8-b261-42d1-b03a-fa765e0bcd9b/bin/uautomizer-verify-uTZkv6EMXl/data/8367540e6/5199963bd90f4105b5124a34f92d582b [2023-11-12 02:30:12,913 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:30:12,916 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:30:12,919 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:30:12,920 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:30:12,925 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:30:12,926 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:30:12" (1/1) ... [2023-11-12 02:30:12,927 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@732efb06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:12, skipping insertion in model container [2023-11-12 02:30:12,928 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:30:12" (1/1) ... [2023-11-12 02:30:12,954 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:30:13,150 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_3a59c9f8-b261-42d1-b03a-fa765e0bcd9b/sv-benchmarks/c/loops-crafted-1/iftelse.c[406,419] [2023-11-12 02:30:13,166 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:30:13,178 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:30:13,192 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_3a59c9f8-b261-42d1-b03a-fa765e0bcd9b/sv-benchmarks/c/loops-crafted-1/iftelse.c[406,419] [2023-11-12 02:30:13,197 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:30:13,213 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:30:13,214 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:13 WrapperNode [2023-11-12 02:30:13,214 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:30:13,216 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:30:13,216 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:30:13,216 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:30:13,224 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:13" (1/1) ... [2023-11-12 02:30:13,232 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:13" (1/1) ... [2023-11-12 02:30:13,251 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 41 [2023-11-12 02:30:13,252 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:30:13,253 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:30:13,253 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:30:13,254 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:30:13,263 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:13" (1/1) ... [2023-11-12 02:30:13,264 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:13" (1/1) ... [2023-11-12 02:30:13,265 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:13" (1/1) ... [2023-11-12 02:30:13,266 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:13" (1/1) ... [2023-11-12 02:30:13,269 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:13" (1/1) ... [2023-11-12 02:30:13,273 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:13" (1/1) ... [2023-11-12 02:30:13,274 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:13" (1/1) ... [2023-11-12 02:30:13,275 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:13" (1/1) ... [2023-11-12 02:30:13,277 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:30:13,278 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:30:13,279 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:30:13,279 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:30:13,280 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:13" (1/1) ... [2023-11-12 02:30:13,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:30:13,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a59c9f8-b261-42d1-b03a-fa765e0bcd9b/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:30:13,316 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a59c9f8-b261-42d1-b03a-fa765e0bcd9b/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:30:13,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a59c9f8-b261-42d1-b03a-fa765e0bcd9b/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:30:13,355 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:30:13,356 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:30:13,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:30:13,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:30:13,426 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:30:13,428 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:30:13,575 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:30:13,581 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:30:13,581 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 02:30:13,584 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:30:13 BoogieIcfgContainer [2023-11-12 02:30:13,584 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:30:13,587 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:30:13,587 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:30:13,591 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:30:13,591 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:30:12" (1/3) ... [2023-11-12 02:30:13,592 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d0c30fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:30:13, skipping insertion in model container [2023-11-12 02:30:13,592 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:13" (2/3) ... [2023-11-12 02:30:13,593 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d0c30fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:30:13, skipping insertion in model container [2023-11-12 02:30:13,593 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:30:13" (3/3) ... [2023-11-12 02:30:13,594 INFO L112 eAbstractionObserver]: Analyzing ICFG iftelse.c [2023-11-12 02:30:13,617 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:30:13,617 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:30:13,673 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:30:13,687 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;@7f67c037, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:30:13,687 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 02:30:13,692 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:13,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-12 02:30:13,699 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:30:13,700 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:30:13,701 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:30:13,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:30:13,707 INFO L85 PathProgramCache]: Analyzing trace with hash 183324244, now seen corresponding path program 1 times [2023-11-12 02:30:13,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:30:13,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295347655] [2023-11-12 02:30:13,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:13,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:30:13,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:14,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:14,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:30:14,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295347655] [2023-11-12 02:30:14,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295347655] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:30:14,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:30:14,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 02:30:14,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106748577] [2023-11-12 02:30:14,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:30:14,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:30:14,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:30:14,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:30:14,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:30:14,989 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:15,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:30:15,184 INFO L93 Difference]: Finished difference Result 35 states and 51 transitions. [2023-11-12 02:30:15,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:30:15,187 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-12 02:30:15,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:30:15,196 INFO L225 Difference]: With dead ends: 35 [2023-11-12 02:30:15,196 INFO L226 Difference]: Without dead ends: 16 [2023-11-12 02:30:15,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:30:15,205 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 9 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:30:15,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 54 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:30:15,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-12 02:30:15,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2023-11-12 02:30:15,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:15,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2023-11-12 02:30:15,245 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 8 [2023-11-12 02:30:15,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:30:15,246 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2023-11-12 02:30:15,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:15,247 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2023-11-12 02:30:15,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-12 02:30:15,248 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:30:15,248 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:30:15,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:30:15,249 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:30:15,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:30:15,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1425053575, now seen corresponding path program 1 times [2023-11-12 02:30:15,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:30:15,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758147621] [2023-11-12 02:30:15,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:15,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:30:15,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:15,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:15,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:30:15,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758147621] [2023-11-12 02:30:15,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758147621] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:30:15,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:30:15,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:30:15,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925501209] [2023-11-12 02:30:15,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:30:15,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:30:15,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:30:15,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:30:15,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:30:15,360 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. 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) [2023-11-12 02:30:15,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:30:15,378 INFO L93 Difference]: Finished difference Result 22 states and 27 transitions. [2023-11-12 02:30:15,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:30:15,379 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 [2023-11-12 02:30:15,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:30:15,381 INFO L225 Difference]: With dead ends: 22 [2023-11-12 02:30:15,381 INFO L226 Difference]: Without dead ends: 14 [2023-11-12 02:30:15,386 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 [2023-11-12 02:30:15,389 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:30:15,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:30:15,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-11-12 02:30:15,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-11-12 02:30:15,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:15,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2023-11-12 02:30:15,400 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2023-11-12 02:30:15,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:30:15,400 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2023-11-12 02:30:15,401 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) [2023-11-12 02:30:15,401 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2023-11-12 02:30:15,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-12 02:30:15,403 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:30:15,403 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:30:15,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:30:15,404 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:30:15,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:30:15,405 INFO L85 PathProgramCache]: Analyzing trace with hash 2117156515, now seen corresponding path program 1 times [2023-11-12 02:30:15,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:30:15,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956053170] [2023-11-12 02:30:15,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:15,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:30:15,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:15,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:15,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:30:15,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956053170] [2023-11-12 02:30:15,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956053170] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:30:15,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112093068] [2023-11-12 02:30:15,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:15,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:30:15,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a59c9f8-b261-42d1-b03a-fa765e0bcd9b/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:30:15,644 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a59c9f8-b261-42d1-b03a-fa765e0bcd9b/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:30:15,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a59c9f8-b261-42d1-b03a-fa765e0bcd9b/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:30:15,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:15,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:30:15,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:30:15,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:15,795 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:30:15,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112093068] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:30:15,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:30:15,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-11-12 02:30:15,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742164550] [2023-11-12 02:30:15,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:30:15,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:30:15,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:30:15,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:30:15,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:30:15,807 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:15,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:30:15,850 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2023-11-12 02:30:15,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:30:15,855 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-12 02:30:15,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:30:15,856 INFO L225 Difference]: With dead ends: 28 [2023-11-12 02:30:15,856 INFO L226 Difference]: Without dead ends: 21 [2023-11-12 02:30:15,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:30:15,861 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 8 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:30:15,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 21 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:30:15,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-12 02:30:15,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2023-11-12 02:30:15,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 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) [2023-11-12 02:30:15,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2023-11-12 02:30:15,878 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 13 [2023-11-12 02:30:15,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:30:15,878 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2023-11-12 02:30:15,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:15,879 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2023-11-12 02:30:15,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-12 02:30:15,880 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:30:15,880 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:30:15,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a59c9f8-b261-42d1-b03a-fa765e0bcd9b/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:30:16,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a59c9f8-b261-42d1-b03a-fa765e0bcd9b/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:30:16,087 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:30:16,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:30:16,088 INFO L85 PathProgramCache]: Analyzing trace with hash 2117216097, now seen corresponding path program 1 times [2023-11-12 02:30:16,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:30:16,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656323093] [2023-11-12 02:30:16,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:16,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:30:16,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:16,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:16,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:30:16,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656323093] [2023-11-12 02:30:16,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656323093] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:30:16,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418391659] [2023-11-12 02:30:16,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:16,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:30:16,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a59c9f8-b261-42d1-b03a-fa765e0bcd9b/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:30:16,601 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a59c9f8-b261-42d1-b03a-fa765e0bcd9b/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:30:16,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a59c9f8-b261-42d1-b03a-fa765e0bcd9b/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:30:16,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:16,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-12 02:30:16,673 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:30:16,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:16,842 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:30:17,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:17,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418391659] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:30:17,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:30:17,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-11-12 02:30:17,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491264123] [2023-11-12 02:30:17,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:30:17,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-12 02:30:17,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:30:17,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-12 02:30:17,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-11-12 02:30:17,105 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 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) [2023-11-12 02:30:19,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:30:19,256 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2023-11-12 02:30:19,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-12 02:30:19,257 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 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 13 [2023-11-12 02:30:19,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:30:19,258 INFO L225 Difference]: With dead ends: 42 [2023-11-12 02:30:19,258 INFO L226 Difference]: Without dead ends: 40 [2023-11-12 02:30:19,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2023-11-12 02:30:19,260 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 46 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 02:30:19,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 50 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 02:30:19,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-12 02:30:19,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2023-11-12 02:30:19,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 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) [2023-11-12 02:30:19,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2023-11-12 02:30:19,269 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 13 [2023-11-12 02:30:19,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:30:19,270 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2023-11-12 02:30:19,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 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) [2023-11-12 02:30:19,270 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2023-11-12 02:30:19,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-12 02:30:19,271 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:30:19,271 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-12 02:30:19,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a59c9f8-b261-42d1-b03a-fa765e0bcd9b/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:30:19,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a59c9f8-b261-42d1-b03a-fa765e0bcd9b/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:30:19,477 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:30:19,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:30:19,478 INFO L85 PathProgramCache]: Analyzing trace with hash -683997770, now seen corresponding path program 2 times [2023-11-12 02:30:19,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:30:19,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936025673] [2023-11-12 02:30:19,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:19,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:30:19,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:19,913 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:19,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:30:19,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936025673] [2023-11-12 02:30:19,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936025673] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:30:19,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389207190] [2023-11-12 02:30:19,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:30:19,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:30:19,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a59c9f8-b261-42d1-b03a-fa765e0bcd9b/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:30:19,916 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a59c9f8-b261-42d1-b03a-fa765e0bcd9b/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:30:19,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a59c9f8-b261-42d1-b03a-fa765e0bcd9b/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:30:20,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:30:20,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:30:20,012 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-12 02:30:20,014 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:30:20,242 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:20,242 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:30:20,981 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:20,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389207190] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:30:20,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:30:20,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-11-12 02:30:20,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500709409] [2023-11-12 02:30:20,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:30:20,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-12 02:30:20,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:30:20,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-12 02:30:20,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2023-11-12 02:30:20,985 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 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) [2023-11-12 02:30:28,177 WARN L293 SmtUtils]: Spent 5.40s on a formula simplification. DAG size of input: 49 DAG size of output: 47 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-12 02:30:41,563 WARN L293 SmtUtils]: Spent 11.21s on a formula simplification. DAG size of input: 51 DAG size of output: 49 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-12 02:30:58,687 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-12 02:31:09,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:31:09,668 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2023-11-12 02:31:09,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-12 02:31:09,669 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 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 18 [2023-11-12 02:31:09,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:31:09,674 INFO L225 Difference]: With dead ends: 57 [2023-11-12 02:31:09,675 INFO L226 Difference]: Without dead ends: 55 [2023-11-12 02:31:09,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 42.9s TimeCoverageRelationStatistics Valid=330, Invalid=860, Unknown=0, NotChecked=0, Total=1190 [2023-11-12 02:31:09,679 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 90 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:31:09,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 70 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2023-11-12 02:31:09,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-12 02:31:09,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2023-11-12 02:31:09,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0625) internal successors, (51), 48 states have internal predecessors, (51), 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) [2023-11-12 02:31:09,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2023-11-12 02:31:09,710 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 18 [2023-11-12 02:31:09,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:31:09,711 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2023-11-12 02:31:09,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 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) [2023-11-12 02:31:09,711 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2023-11-12 02:31:09,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-12 02:31:09,715 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:31:09,715 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 3, 3, 1, 1, 1, 1, 1] [2023-11-12 02:31:09,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a59c9f8-b261-42d1-b03a-fa765e0bcd9b/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:31:09,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a59c9f8-b261-42d1-b03a-fa765e0bcd9b/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:31:09,922 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:31:09,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:31:09,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1469978013, now seen corresponding path program 3 times [2023-11-12 02:31:09,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:31:09,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587908282] [2023-11-12 02:31:09,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:31:09,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:31:09,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:10,565 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:31:10,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:31:10,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587908282] [2023-11-12 02:31:10,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587908282] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:31:10,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616540148] [2023-11-12 02:31:10,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:31:10,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:31:10,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a59c9f8-b261-42d1-b03a-fa765e0bcd9b/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:31:10,578 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a59c9f8-b261-42d1-b03a-fa765e0bcd9b/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:31:10,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a59c9f8-b261-42d1-b03a-fa765e0bcd9b/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:31:14,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-12 02:31:14,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:31:14,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-12 02:31:14,224 INFO L285 TraceCheckSpWp]: Computing forward predicates...