./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/array_2-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b 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_99c49e46-f31d-4aa1-b9b4-fb49182d07d1/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99c49e46-f31d-4aa1-b9b4-fb49182d07d1/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99c49e46-f31d-4aa1-b9b4-fb49182d07d1/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99c49e46-f31d-4aa1-b9b4-fb49182d07d1/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-acceleration/array_2-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99c49e46-f31d-4aa1-b9b4-fb49182d07d1/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99c49e46-f31d-4aa1-b9b4-fb49182d07d1/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 d1726b0c52a0be10cb8b374bfde8cdbfe3513d4b934203f7e56a3a1bce5e9e5b --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:03:10,741 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:03:10,885 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99c49e46-f31d-4aa1-b9b4-fb49182d07d1/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 23:03:10,894 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:03:10,895 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:03:10,941 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:03:10,942 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:03:10,943 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:03:10,944 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:03:10,950 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:03:10,951 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:03:10,951 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:03:10,952 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:03:10,954 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:03:10,955 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 23:03:10,955 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:03:10,956 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:03:10,956 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:03:10,957 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:03:10,957 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 23:03:10,958 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:03:10,958 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 23:03:10,959 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:03:10,959 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 23:03:10,960 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:03:10,961 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:03:10,962 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:03:10,962 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:03:10,963 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:03:10,963 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:03:10,965 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:03:10,965 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 23:03:10,965 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:03:10,966 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:03:10,966 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:03:10,966 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 23:03:10,967 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:03:10,967 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:03:10,967 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:03:10,967 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_99c49e46-f31d-4aa1-b9b4-fb49182d07d1/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99c49e46-f31d-4aa1-b9b4-fb49182d07d1/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d1726b0c52a0be10cb8b374bfde8cdbfe3513d4b934203f7e56a3a1bce5e9e5b [2023-11-06 23:03:11,307 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:03:11,347 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:03:11,350 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:03:11,351 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:03:11,352 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:03:11,353 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99c49e46-f31d-4aa1-b9b4-fb49182d07d1/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/loop-acceleration/array_2-1.i [2023-11-06 23:03:14,561 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:03:14,825 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:03:14,825 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99c49e46-f31d-4aa1-b9b4-fb49182d07d1/sv-benchmarks/c/loop-acceleration/array_2-1.i [2023-11-06 23:03:14,834 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99c49e46-f31d-4aa1-b9b4-fb49182d07d1/bin/uautomizer-verify-WvqO1wxjHP/data/98670121c/7a7234a1ee1141cc8bd0e9004a4f5e0c/FLAG1c3da9918 [2023-11-06 23:03:14,862 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99c49e46-f31d-4aa1-b9b4-fb49182d07d1/bin/uautomizer-verify-WvqO1wxjHP/data/98670121c/7a7234a1ee1141cc8bd0e9004a4f5e0c [2023-11-06 23:03:14,864 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:03:14,866 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:03:14,869 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:03:14,870 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:03:14,876 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:03:14,876 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:03:14" (1/1) ... [2023-11-06 23:03:14,878 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53550695 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:14, skipping insertion in model container [2023-11-06 23:03:14,878 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:03:14" (1/1) ... [2023-11-06 23:03:14,903 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:03:15,066 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_99c49e46-f31d-4aa1-b9b4-fb49182d07d1/sv-benchmarks/c/loop-acceleration/array_2-1.i[849,862] [2023-11-06 23:03:15,086 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:03:15,097 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:03:15,109 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_99c49e46-f31d-4aa1-b9b4-fb49182d07d1/sv-benchmarks/c/loop-acceleration/array_2-1.i[849,862] [2023-11-06 23:03:15,115 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:03:15,131 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:03:15,132 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:15 WrapperNode [2023-11-06 23:03:15,132 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:03:15,133 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:03:15,134 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:03:15,134 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:03:15,142 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:15" (1/1) ... [2023-11-06 23:03:15,149 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:15" (1/1) ... [2023-11-06 23:03:15,169 INFO L138 Inliner]: procedures = 16, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 55 [2023-11-06 23:03:15,169 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:03:15,170 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:03:15,171 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:03:15,171 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:03:15,179 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:15" (1/1) ... [2023-11-06 23:03:15,180 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:15" (1/1) ... [2023-11-06 23:03:15,182 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:15" (1/1) ... [2023-11-06 23:03:15,182 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:15" (1/1) ... [2023-11-06 23:03:15,188 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:15" (1/1) ... [2023-11-06 23:03:15,193 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:15" (1/1) ... [2023-11-06 23:03:15,194 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:15" (1/1) ... [2023-11-06 23:03:15,195 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:15" (1/1) ... [2023-11-06 23:03:15,198 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:03:15,199 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:03:15,199 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:03:15,200 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:03:15,201 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:15" (1/1) ... [2023-11-06 23:03:15,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:03:15,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99c49e46-f31d-4aa1-b9b4-fb49182d07d1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:15,242 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99c49e46-f31d-4aa1-b9b4-fb49182d07d1/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:03:15,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99c49e46-f31d-4aa1-b9b4-fb49182d07d1/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:03:15,297 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:03:15,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 23:03:15,298 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 23:03:15,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 23:03:15,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:03:15,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:03:15,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 23:03:15,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 23:03:15,402 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:03:15,404 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:03:15,649 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:03:15,659 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:03:15,659 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 23:03:15,662 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:03:15 BoogieIcfgContainer [2023-11-06 23:03:15,662 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:03:15,666 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:03:15,668 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:03:15,672 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:03:15,672 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:03:14" (1/3) ... [2023-11-06 23:03:15,673 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fe21373 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:03:15, skipping insertion in model container [2023-11-06 23:03:15,674 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:15" (2/3) ... [2023-11-06 23:03:15,674 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fe21373 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:03:15, skipping insertion in model container [2023-11-06 23:03:15,674 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:03:15" (3/3) ... [2023-11-06 23:03:15,677 INFO L112 eAbstractionObserver]: Analyzing ICFG array_2-1.i [2023-11-06 23:03:15,703 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:03:15,704 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 23:03:15,787 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:03:15,796 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=LoopsAndPotentialCycles, 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;@62e729ac, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:03:15,797 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 23:03:15,806 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 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) [2023-11-06 23:03:15,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-06 23:03:15,814 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:15,814 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:15,815 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:03:15,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:15,840 INFO L85 PathProgramCache]: Analyzing trace with hash 212047733, now seen corresponding path program 1 times [2023-11-06 23:03:15,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:15,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954006217] [2023-11-06 23:03:15,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:15,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:15,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:16,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:16,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:16,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954006217] [2023-11-06 23:03:16,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954006217] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:03:16,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:03:16,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:03:16,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448126499] [2023-11-06 23:03:16,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:03:16,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:03:16,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:16,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:03:16,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:03:16,140 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 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 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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) [2023-11-06 23:03:16,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:03:16,190 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2023-11-06 23:03:16,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:03:16,193 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 [2023-11-06 23:03:16,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:03:16,202 INFO L225 Difference]: With dead ends: 30 [2023-11-06 23:03:16,202 INFO L226 Difference]: Without dead ends: 15 [2023-11-06 23:03:16,206 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 [2023-11-06 23:03:16,211 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:03:16,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 19 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:03:16,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-06 23:03:16,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 13. [2023-11-06 23:03:16,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 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) [2023-11-06 23:03:16,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2023-11-06 23:03:16,247 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 8 [2023-11-06 23:03:16,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:03:16,247 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2023-11-06 23:03:16,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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) [2023-11-06 23:03:16,248 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2023-11-06 23:03:16,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-06 23:03:16,249 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:16,249 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:16,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 23:03:16,250 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:03:16,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:16,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1312443705, now seen corresponding path program 1 times [2023-11-06 23:03:16,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:16,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411801373] [2023-11-06 23:03:16,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:16,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:16,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:16,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:16,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:16,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411801373] [2023-11-06 23:03:16,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411801373] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:16,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093181748] [2023-11-06 23:03:16,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:16,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:16,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99c49e46-f31d-4aa1-b9b4-fb49182d07d1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:16,451 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99c49e46-f31d-4aa1-b9b4-fb49182d07d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:16,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99c49e46-f31d-4aa1-b9b4-fb49182d07d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 23:03:16,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:16,583 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 23:03:16,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:16,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:16,640 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:16,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:16,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093181748] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:16,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:03:16,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-06 23:03:16,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359061410] [2023-11-06 23:03:16,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:16,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:03:16,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:16,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:03:16,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:03:16,677 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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) [2023-11-06 23:03:16,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:03:16,745 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2023-11-06 23:03:16,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:03:16,746 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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) Word has length 12 [2023-11-06 23:03:16,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:03:16,747 INFO L225 Difference]: With dead ends: 33 [2023-11-06 23:03:16,747 INFO L226 Difference]: Without dead ends: 25 [2023-11-06 23:03:16,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:03:16,750 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 9 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:03:16,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 16 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:03:16,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-06 23:03:16,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-11-06 23:03:16,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 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) [2023-11-06 23:03:16,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2023-11-06 23:03:16,759 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 12 [2023-11-06 23:03:16,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:03:16,760 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2023-11-06 23:03:16,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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) [2023-11-06 23:03:16,760 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2023-11-06 23:03:16,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-06 23:03:16,761 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:16,762 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:16,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99c49e46-f31d-4aa1-b9b4-fb49182d07d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:16,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99c49e46-f31d-4aa1-b9b4-fb49182d07d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:16,973 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:03:16,974 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:16,974 INFO L85 PathProgramCache]: Analyzing trace with hash 682476165, now seen corresponding path program 2 times [2023-11-06 23:03:16,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:16,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157990169] [2023-11-06 23:03:16,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:16,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:17,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:17,298 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-06 23:03:17,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:17,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157990169] [2023-11-06 23:03:17,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157990169] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:17,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742235409] [2023-11-06 23:03:17,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:03:17,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:17,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99c49e46-f31d-4aa1-b9b4-fb49182d07d1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:17,302 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99c49e46-f31d-4aa1-b9b4-fb49182d07d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:17,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99c49e46-f31d-4aa1-b9b4-fb49182d07d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 23:03:17,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:03:17,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:03:17,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:03:17,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:17,532 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-06 23:03:17,533 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:17,639 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-06 23:03:17,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742235409] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:17,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:03:17,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-06 23:03:17,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615752251] [2023-11-06 23:03:17,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:17,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 23:03:17,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:17,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 23:03:17,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-06 23:03:17,651 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:17,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:03:17,807 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2023-11-06 23:03:17,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 23:03:17,808 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-11-06 23:03:17,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:03:17,810 INFO L225 Difference]: With dead ends: 63 [2023-11-06 23:03:17,810 INFO L226 Difference]: Without dead ends: 49 [2023-11-06 23:03:17,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-06 23:03:17,815 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 25 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:03:17,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 16 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:03:17,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-06 23:03:17,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-11-06 23:03:17,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 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) [2023-11-06 23:03:17,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2023-11-06 23:03:17,836 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 24 [2023-11-06 23:03:17,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:03:17,836 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2023-11-06 23:03:17,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:17,837 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2023-11-06 23:03:17,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-06 23:03:17,840 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:17,840 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:17,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99c49e46-f31d-4aa1-b9b4-fb49182d07d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-06 23:03:18,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99c49e46-f31d-4aa1-b9b4-fb49182d07d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-06 23:03:18,047 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:03:18,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:18,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1926519011, now seen corresponding path program 3 times [2023-11-06 23:03:18,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:18,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170879720] [2023-11-06 23:03:18,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:18,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:18,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:18,678 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-06 23:03:18,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:18,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170879720] [2023-11-06 23:03:18,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170879720] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:18,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933227466] [2023-11-06 23:03:18,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:03:18,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:18,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99c49e46-f31d-4aa1-b9b4-fb49182d07d1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:18,689 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99c49e46-f31d-4aa1-b9b4-fb49182d07d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:18,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99c49e46-f31d-4aa1-b9b4-fb49182d07d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 23:03:21,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-11-06 23:03:21,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:03:21,285 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 23:03:21,290 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:21,378 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-06 23:03:21,379 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:21,709 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-06 23:03:21,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933227466] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:21,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:03:21,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-11-06 23:03:21,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777299846] [2023-11-06 23:03:21,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:21,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 23:03:21,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:21,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 23:03:21,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-06 23:03:21,720 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 25 states, 25 states have (on average 3.12) internal successors, (78), 25 states have internal predecessors, (78), 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) [2023-11-06 23:03:21,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:03:21,957 INFO L93 Difference]: Finished difference Result 123 states and 148 transitions. [2023-11-06 23:03:21,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 23:03:21,958 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.12) internal successors, (78), 25 states have internal predecessors, (78), 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 48 [2023-11-06 23:03:21,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:03:21,960 INFO L225 Difference]: With dead ends: 123 [2023-11-06 23:03:21,960 INFO L226 Difference]: Without dead ends: 97 [2023-11-06 23:03:21,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-06 23:03:21,962 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 27 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:03:21,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 24 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:03:21,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-11-06 23:03:21,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2023-11-06 23:03:21,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 96 states have internal predecessors, (98), 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) [2023-11-06 23:03:21,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2023-11-06 23:03:21,977 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 48 [2023-11-06 23:03:21,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:03:21,978 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2023-11-06 23:03:21,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.12) internal successors, (78), 25 states have internal predecessors, (78), 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) [2023-11-06 23:03:21,979 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2023-11-06 23:03:21,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-06 23:03:21,982 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:21,983 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:21,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99c49e46-f31d-4aa1-b9b4-fb49182d07d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:22,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99c49e46-f31d-4aa1-b9b4-fb49182d07d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:22,193 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:03:22,194 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:22,194 INFO L85 PathProgramCache]: Analyzing trace with hash -154707891, now seen corresponding path program 4 times [2023-11-06 23:03:22,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:22,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125832935] [2023-11-06 23:03:22,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:22,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:22,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:23,463 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2023-11-06 23:03:23,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:23,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125832935] [2023-11-06 23:03:23,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125832935] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:23,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595833751] [2023-11-06 23:03:23,465 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:03:23,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:23,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99c49e46-f31d-4aa1-b9b4-fb49182d07d1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:23,467 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99c49e46-f31d-4aa1-b9b4-fb49182d07d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:23,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99c49e46-f31d-4aa1-b9b4-fb49182d07d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 23:03:23,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:03:23,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:03:23,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 23:03:23,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:23,891 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2023-11-06 23:03:23,891 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:24,937 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2023-11-06 23:03:24,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595833751] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:24,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:03:24,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2023-11-06 23:03:24,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799868083] [2023-11-06 23:03:24,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:24,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-06 23:03:24,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:24,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-06 23:03:24,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-11-06 23:03:24,957 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 49 states, 49 states have (on average 3.061224489795918) internal successors, (150), 49 states have internal predecessors, (150), 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) [2023-11-06 23:03:25,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:03:25,503 INFO L93 Difference]: Finished difference Result 243 states and 292 transitions. [2023-11-06 23:03:25,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-06 23:03:25,505 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.061224489795918) internal successors, (150), 49 states have internal predecessors, (150), 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 96 [2023-11-06 23:03:25,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:03:25,507 INFO L225 Difference]: With dead ends: 243 [2023-11-06 23:03:25,508 INFO L226 Difference]: Without dead ends: 193 [2023-11-06 23:03:25,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-11-06 23:03:25,511 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 59 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 23:03:25,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 36 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 23:03:25,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2023-11-06 23:03:25,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2023-11-06 23:03:25,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.0104166666666667) internal successors, (194), 192 states have internal predecessors, (194), 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) [2023-11-06 23:03:25,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 194 transitions. [2023-11-06 23:03:25,536 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 194 transitions. Word has length 96 [2023-11-06 23:03:25,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:03:25,537 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 194 transitions. [2023-11-06 23:03:25,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.061224489795918) internal successors, (150), 49 states have internal predecessors, (150), 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) [2023-11-06 23:03:25,538 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 194 transitions. [2023-11-06 23:03:25,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2023-11-06 23:03:25,544 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:25,544 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:25,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99c49e46-f31d-4aa1-b9b4-fb49182d07d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:25,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99c49e46-f31d-4aa1-b9b4-fb49182d07d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:25,752 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:03:25,752 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:25,753 INFO L85 PathProgramCache]: Analyzing trace with hash -224503123, now seen corresponding path program 5 times [2023-11-06 23:03:25,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:25,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525691251] [2023-11-06 23:03:25,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:25,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:25,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:29,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2023-11-06 23:03:29,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:29,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525691251] [2023-11-06 23:03:29,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525691251] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:29,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197224947] [2023-11-06 23:03:29,549 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:03:29,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:29,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99c49e46-f31d-4aa1-b9b4-fb49182d07d1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:29,550 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99c49e46-f31d-4aa1-b9b4-fb49182d07d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:29,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99c49e46-f31d-4aa1-b9b4-fb49182d07d1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process