./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 68585835b92043bfb2f3c62590e96ff685993869f8a251aecd9fe4c8aaea0e1e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:44:30,827 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:44:30,941 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:44:30,953 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:44:30,954 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:44:30,990 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:44:30,992 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:44:30,993 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:44:30,994 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:44:30,999 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:44:31,001 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:44:31,002 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:44:31,002 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:44:31,004 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:44:31,004 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:44:31,005 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:44:31,005 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:44:31,006 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:44:31,006 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:44:31,006 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:44:31,007 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:44:31,007 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:44:31,008 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:44:31,008 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:44:31,009 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:44:31,009 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:44:31,010 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:44:31,010 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:44:31,011 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:44:31,011 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:44:31,013 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:44:31,013 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:44:31,013 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:44:31,013 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:44:31,014 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:44:31,014 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:44:31,014 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:44:31,014 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:44:31,015 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:44:31,015 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_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68585835b92043bfb2f3c62590e96ff685993869f8a251aecd9fe4c8aaea0e1e [2023-11-19 07:44:31,310 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:44:31,339 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:44:31,341 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:44:31,344 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:44:31,345 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:44:31,346 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i [2023-11-19 07:44:34,379 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:44:34,640 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:44:34,641 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i [2023-11-19 07:44:34,650 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/data/61d91d725/11d8484838d64ecd9701b99217a005e5/FLAG58d41efd0 [2023-11-19 07:44:34,669 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/data/61d91d725/11d8484838d64ecd9701b99217a005e5 [2023-11-19 07:44:34,686 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:44:34,688 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:44:34,691 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:44:34,692 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:44:34,697 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:44:34,698 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:44:34" (1/1) ... [2023-11-19 07:44:34,699 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c9f6344 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:34, skipping insertion in model container [2023-11-19 07:44:34,700 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:44:34" (1/1) ... [2023-11-19 07:44:34,725 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:44:34,903 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_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i[820,833] [2023-11-19 07:44:34,922 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:44:34,931 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:44:34,943 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_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i[820,833] [2023-11-19 07:44:34,952 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:44:34,967 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:44:34,968 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:34 WrapperNode [2023-11-19 07:44:34,968 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:44:34,969 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:44:34,970 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:44:34,970 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:44:34,977 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:34" (1/1) ... [2023-11-19 07:44:34,985 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:34" (1/1) ... [2023-11-19 07:44:35,007 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2023-11-19 07:44:35,008 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:44:35,009 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:44:35,009 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:44:35,009 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:44:35,018 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:34" (1/1) ... [2023-11-19 07:44:35,019 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:34" (1/1) ... [2023-11-19 07:44:35,021 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:34" (1/1) ... [2023-11-19 07:44:35,021 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:34" (1/1) ... [2023-11-19 07:44:35,027 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:34" (1/1) ... [2023-11-19 07:44:35,031 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:34" (1/1) ... [2023-11-19 07:44:35,033 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:34" (1/1) ... [2023-11-19 07:44:35,034 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:34" (1/1) ... [2023-11-19 07:44:35,036 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:44:35,037 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:44:35,038 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:44:35,038 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:44:35,039 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:34" (1/1) ... [2023-11-19 07:44:35,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:44:35,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:35,074 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:44:35,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:44:35,113 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:44:35,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:44:35,113 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:44:35,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:44:35,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:44:35,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:44:35,114 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:44:35,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:44:35,188 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:44:35,191 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:44:35,361 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:44:35,368 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:44:35,368 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-19 07:44:35,371 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:44:35 BoogieIcfgContainer [2023-11-19 07:44:35,372 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:44:35,375 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:44:35,375 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:44:35,379 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:44:35,379 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:44:34" (1/3) ... [2023-11-19 07:44:35,380 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37cf1586 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:44:35, skipping insertion in model container [2023-11-19 07:44:35,380 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:34" (2/3) ... [2023-11-19 07:44:35,380 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37cf1586 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:44:35, skipping insertion in model container [2023-11-19 07:44:35,381 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:44:35" (3/3) ... [2023-11-19 07:44:35,382 INFO L112 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_ground-1.i [2023-11-19 07:44:35,403 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:44:35,403 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:44:35,456 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:44:35,463 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;@63cd5592, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:44:35,464 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:44:35,468 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.619047619047619) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:35,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-19 07:44:35,475 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:35,476 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:35,477 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:35,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:35,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1961330543, now seen corresponding path program 1 times [2023-11-19 07:44:35,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:35,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170672657] [2023-11-19 07:44:35,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:35,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:35,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:35,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:44:35,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:35,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170672657] [2023-11-19 07:44:35,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170672657] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:44:35,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:44:35,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:44:35,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956958908] [2023-11-19 07:44:35,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:44:35,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:44:35,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:35,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:44:35,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:44:35,840 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.619047619047619) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:35,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:35,874 INFO L93 Difference]: Finished difference Result 44 states and 66 transitions. [2023-11-19 07:44:35,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:44:35,877 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-19 07:44:35,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:35,885 INFO L225 Difference]: With dead ends: 44 [2023-11-19 07:44:35,885 INFO L226 Difference]: Without dead ends: 21 [2023-11-19 07:44:35,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:44:35,892 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:44:35,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 48 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:44:35,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-19 07:44:35,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2023-11-19 07:44:35,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:35,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2023-11-19 07:44:35,926 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 10 [2023-11-19 07:44:35,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:35,927 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2023-11-19 07:44:35,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:35,928 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2023-11-19 07:44:35,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-19 07:44:35,928 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:35,929 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:35,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:44:35,929 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:35,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:35,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1306132977, now seen corresponding path program 1 times [2023-11-19 07:44:35,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:35,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016826965] [2023-11-19 07:44:35,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:35,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:35,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:36,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:44:36,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:36,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016826965] [2023-11-19 07:44:36,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016826965] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:44:36,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816764868] [2023-11-19 07:44:36,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:36,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:36,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:36,047 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:36,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:44:36,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:36,125 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:44:36,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:36,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:44:36,150 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:44:36,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816764868] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:44:36,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:44:36,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-19 07:44:36,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133607047] [2023-11-19 07:44:36,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:44:36,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:44:36,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:36,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:44:36,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:44:36,154 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:36,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:36,169 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2023-11-19 07:44:36,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:44:36,170 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 [2023-11-19 07:44:36,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:36,171 INFO L225 Difference]: With dead ends: 34 [2023-11-19 07:44:36,171 INFO L226 Difference]: Without dead ends: 25 [2023-11-19 07:44:36,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:44:36,173 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 5 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 47 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 [2023-11-19 07:44:36,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 47 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:44:36,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-19 07:44:36,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-11-19 07:44:36,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:36,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2023-11-19 07:44:36,181 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 12 [2023-11-19 07:44:36,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:36,182 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2023-11-19 07:44:36,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:36,182 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2023-11-19 07:44:36,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-19 07:44:36,183 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:36,183 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:36,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:36,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:36,398 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:36,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:36,399 INFO L85 PathProgramCache]: Analyzing trace with hash 735433629, now seen corresponding path program 1 times [2023-11-19 07:44:36,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:36,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671470051] [2023-11-19 07:44:36,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:36,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:36,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:36,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:44:36,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:36,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671470051] [2023-11-19 07:44:36,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671470051] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:44:36,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026878503] [2023-11-19 07:44:36,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:36,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:36,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:36,541 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:36,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:44:36,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:36,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:44:36,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:36,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:44:36,651 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:44:36,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026878503] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:44:36,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:44:36,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-19 07:44:36,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828099475] [2023-11-19 07:44:36,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:44:36,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:44:36,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:36,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:44:36,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:44:36,656 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:36,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:36,691 INFO L93 Difference]: Finished difference Result 48 states and 63 transitions. [2023-11-19 07:44:36,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:44:36,692 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-19 07:44:36,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:36,694 INFO L225 Difference]: With dead ends: 48 [2023-11-19 07:44:36,696 INFO L226 Difference]: Without dead ends: 29 [2023-11-19 07:44:36,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:44:36,699 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 3 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:44:36,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 38 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:44:36,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-19 07:44:36,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2023-11-19 07:44:36,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:36,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2023-11-19 07:44:36,715 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 15 [2023-11-19 07:44:36,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:36,715 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2023-11-19 07:44:36,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:36,716 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2023-11-19 07:44:36,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-19 07:44:36,717 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:36,717 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:36,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:36,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:36,918 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:36,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:36,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1537360201, now seen corresponding path program 1 times [2023-11-19 07:44:36,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:36,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943236518] [2023-11-19 07:44:36,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:36,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:36,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:37,040 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:44:37,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:37,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943236518] [2023-11-19 07:44:37,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943236518] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:44:37,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711248771] [2023-11-19 07:44:37,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:37,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:37,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:37,044 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:37,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:44:37,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:37,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:44:37,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:37,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:44:37,143 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:44:37,169 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:44:37,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711248771] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:44:37,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:44:37,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-19 07:44:37,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975993690] [2023-11-19 07:44:37,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:44:37,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:44:37,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:37,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:44:37,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:44:37,172 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:37,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:37,205 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2023-11-19 07:44:37,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:44:37,206 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-19 07:44:37,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:37,207 INFO L225 Difference]: With dead ends: 53 [2023-11-19 07:44:37,207 INFO L226 Difference]: Without dead ends: 32 [2023-11-19 07:44:37,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:44:37,210 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 2 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:44:37,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 79 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:44:37,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-19 07:44:37,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-11-19 07:44:37,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:37,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2023-11-19 07:44:37,217 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 18 [2023-11-19 07:44:37,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:37,218 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2023-11-19 07:44:37,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:37,218 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2023-11-19 07:44:37,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-19 07:44:37,219 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:37,219 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:37,245 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-19 07:44:37,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:37,443 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:37,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:37,444 INFO L85 PathProgramCache]: Analyzing trace with hash 60072271, now seen corresponding path program 2 times [2023-11-19 07:44:37,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:37,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702352564] [2023-11-19 07:44:37,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:37,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:37,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:37,583 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-19 07:44:37,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:37,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702352564] [2023-11-19 07:44:37,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702352564] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:44:37,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885822453] [2023-11-19 07:44:37,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:44:37,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:37,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:37,586 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:37,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:44:37,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:44:37,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:44:37,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:44:37,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:37,782 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:44:37,782 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:44:37,889 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:44:37,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885822453] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:44:37,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:44:37,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2023-11-19 07:44:37,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982395701] [2023-11-19 07:44:37,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:44:37,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 07:44:37,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:37,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 07:44:37,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:44:37,902 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:38,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:38,010 INFO L93 Difference]: Finished difference Result 74 states and 98 transitions. [2023-11-19 07:44:38,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 07:44:38,015 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 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 [2023-11-19 07:44:38,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:38,018 INFO L225 Difference]: With dead ends: 74 [2023-11-19 07:44:38,022 INFO L226 Difference]: Without dead ends: 53 [2023-11-19 07:44:38,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:44:38,024 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 7 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:44:38,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 115 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:44:38,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-19 07:44:38,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2023-11-19 07:44:38,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:38,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2023-11-19 07:44:38,032 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 24 [2023-11-19 07:44:38,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:38,033 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2023-11-19 07:44:38,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:38,033 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2023-11-19 07:44:38,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-19 07:44:38,040 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:38,040 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:38,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:38,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:38,254 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:38,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:38,255 INFO L85 PathProgramCache]: Analyzing trace with hash 2139379787, now seen corresponding path program 3 times [2023-11-19 07:44:38,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:38,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607353386] [2023-11-19 07:44:38,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:38,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:38,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:38,413 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-19 07:44:38,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:38,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607353386] [2023-11-19 07:44:38,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607353386] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:44:38,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677510346] [2023-11-19 07:44:38,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:44:38,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:38,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:38,416 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:38,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:44:38,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-19 07:44:38,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:44:38,508 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:44:38,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:38,544 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-19 07:44:38,544 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:44:38,593 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-19 07:44:38,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677510346] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:44:38,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:44:38,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-11-19 07:44:38,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820115382] [2023-11-19 07:44:38,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:44:38,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 07:44:38,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:38,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 07:44:38,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:44:38,601 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:38,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:38,659 INFO L93 Difference]: Finished difference Result 98 states and 129 transitions. [2023-11-19 07:44:38,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:44:38,660 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-11-19 07:44:38,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:38,666 INFO L225 Difference]: With dead ends: 98 [2023-11-19 07:44:38,666 INFO L226 Difference]: Without dead ends: 73 [2023-11-19 07:44:38,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:44:38,669 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:44:38,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 59 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:44:38,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-11-19 07:44:38,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2023-11-19 07:44:38,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.2361111111111112) internal successors, (89), 72 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:38,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 89 transitions. [2023-11-19 07:44:38,696 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 89 transitions. Word has length 39 [2023-11-19 07:44:38,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:38,697 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 89 transitions. [2023-11-19 07:44:38,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:38,697 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 89 transitions. [2023-11-19 07:44:38,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-19 07:44:38,701 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:38,701 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:38,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:38,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:38,919 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:38,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:38,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1707834293, now seen corresponding path program 4 times [2023-11-19 07:44:38,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:38,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664146456] [2023-11-19 07:44:38,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:38,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:38,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:39,279 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-19 07:44:39,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:39,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664146456] [2023-11-19 07:44:39,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664146456] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:44:39,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57377778] [2023-11-19 07:44:39,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:44:39,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:39,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:39,283 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:39,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:44:39,384 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:44:39,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:44:39,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 07:44:39,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:39,450 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-19 07:44:39,450 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:44:39,721 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-19 07:44:39,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57377778] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:44:39,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:44:39,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-11-19 07:44:39,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015979238] [2023-11-19 07:44:39,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:44:39,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-19 07:44:39,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:39,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-19 07:44:39,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-19 07:44:39,728 INFO L87 Difference]: Start difference. First operand 73 states and 89 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:39,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:39,837 INFO L93 Difference]: Finished difference Result 147 states and 190 transitions. [2023-11-19 07:44:39,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-19 07:44:39,837 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 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 51 [2023-11-19 07:44:39,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:39,840 INFO L225 Difference]: With dead ends: 147 [2023-11-19 07:44:39,842 INFO L226 Difference]: Without dead ends: 97 [2023-11-19 07:44:39,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-19 07:44:39,845 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 2 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 60 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 [2023-11-19 07:44:39,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 60 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:44:39,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-11-19 07:44:39,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2023-11-19 07:44:39,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:39,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2023-11-19 07:44:39,864 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 51 [2023-11-19 07:44:39,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:39,867 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2023-11-19 07:44:39,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:39,868 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2023-11-19 07:44:39,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-19 07:44:39,874 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:39,874 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:39,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:40,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:40,088 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:40,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:40,089 INFO L85 PathProgramCache]: Analyzing trace with hash -56741325, now seen corresponding path program 5 times [2023-11-19 07:44:40,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:40,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504329448] [2023-11-19 07:44:40,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:40,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:40,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:40,921 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-19 07:44:40,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:40,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504329448] [2023-11-19 07:44:40,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504329448] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:44:40,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349210719] [2023-11-19 07:44:40,922 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:44:40,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:40,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:40,923 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:40,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:44:41,672 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2023-11-19 07:44:41,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:44:41,676 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:44:41,680 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:41,836 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2023-11-19 07:44:41,836 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:44:42,043 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2023-11-19 07:44:42,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349210719] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:44:42,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:44:42,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9, 9] total 39 [2023-11-19 07:44:42,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878883391] [2023-11-19 07:44:42,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:44:42,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-19 07:44:42,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:42,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-19 07:44:42,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1063, Unknown=0, NotChecked=0, Total=1482 [2023-11-19 07:44:42,047 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 39 states, 39 states have (on average 2.6923076923076925) internal successors, (105), 39 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:42,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:42,246 INFO L93 Difference]: Finished difference Result 198 states and 262 transitions. [2023-11-19 07:44:42,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-19 07:44:42,246 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.6923076923076925) internal successors, (105), 39 states have internal predecessors, (105), 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 75 [2023-11-19 07:44:42,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:42,248 INFO L225 Difference]: With dead ends: 198 [2023-11-19 07:44:42,248 INFO L226 Difference]: Without dead ends: 148 [2023-11-19 07:44:42,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=419, Invalid=1063, Unknown=0, NotChecked=0, Total=1482 [2023-11-19 07:44:42,252 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 31 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:44:42,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 166 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:44:42,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-11-19 07:44:42,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2023-11-19 07:44:42,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.226027397260274) internal successors, (179), 146 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:42,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 179 transitions. [2023-11-19 07:44:42,277 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 179 transitions. Word has length 75 [2023-11-19 07:44:42,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:42,278 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 179 transitions. [2023-11-19 07:44:42,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.6923076923076925) internal successors, (105), 39 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:42,278 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 179 transitions. [2023-11-19 07:44:42,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-11-19 07:44:42,280 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:42,280 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:42,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:42,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:42,503 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:42,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:42,504 INFO L85 PathProgramCache]: Analyzing trace with hash -315531791, now seen corresponding path program 6 times [2023-11-19 07:44:42,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:42,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485870328] [2023-11-19 07:44:42,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:42,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:42,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:43,359 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2023-11-19 07:44:43,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:43,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485870328] [2023-11-19 07:44:43,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485870328] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:44:43,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104762974] [2023-11-19 07:44:43,360 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-19 07:44:43,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:43,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:43,362 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:43,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:44:43,486 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-11-19 07:44:43,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:44:43,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-19 07:44:43,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:44,009 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:44:44,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2023-11-19 07:44:44,034 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 1 proven. 27 refuted. 0 times theorem prover too weak. 789 trivial. 0 not checked. [2023-11-19 07:44:44,035 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:44:44,336 INFO L349 Elim1Store]: treesize reduction 13, result has 60.6 percent of original size [2023-11-19 07:44:44,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 28 [2023-11-19 07:44:44,398 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 14 proven. 14 refuted. 0 times theorem prover too weak. 789 trivial. 0 not checked. [2023-11-19 07:44:44,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104762974] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:44:44,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:44:44,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 9, 8] total 38 [2023-11-19 07:44:44,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160828150] [2023-11-19 07:44:44,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:44:44,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-19 07:44:44,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:44,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-19 07:44:44,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=1037, Unknown=0, NotChecked=0, Total=1406 [2023-11-19 07:44:44,403 INFO L87 Difference]: Start difference. First operand 147 states and 179 transitions. Second operand has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 38 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:45,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:45,411 INFO L93 Difference]: Finished difference Result 262 states and 330 transitions. [2023-11-19 07:44:45,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-19 07:44:45,412 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 38 states have internal predecessors, (97), 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 101 [2023-11-19 07:44:45,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:45,413 INFO L225 Difference]: With dead ends: 262 [2023-11-19 07:44:45,414 INFO L226 Difference]: Without dead ends: 164 [2023-11-19 07:44:45,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 189 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1054, Invalid=3236, Unknown=0, NotChecked=0, Total=4290 [2023-11-19 07:44:45,417 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 62 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:44:45,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 190 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:44:45,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2023-11-19 07:44:45,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 152. [2023-11-19 07:44:45,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.218543046357616) internal successors, (184), 151 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:45,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 184 transitions. [2023-11-19 07:44:45,432 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 184 transitions. Word has length 101 [2023-11-19 07:44:45,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:45,433 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 184 transitions. [2023-11-19 07:44:45,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 38 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:45,433 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 184 transitions. [2023-11-19 07:44:45,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-11-19 07:44:45,435 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:45,435 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:45,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:45,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:45,656 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:45,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:45,656 INFO L85 PathProgramCache]: Analyzing trace with hash 359100517, now seen corresponding path program 1 times [2023-11-19 07:44:45,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:45,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588070868] [2023-11-19 07:44:45,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:45,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:45,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:46,597 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2023-11-19 07:44:46,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:46,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588070868] [2023-11-19 07:44:46,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588070868] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:44:46,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162914968] [2023-11-19 07:44:46,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:46,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:46,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:46,600 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:46,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:44:46,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:46,769 INFO L262 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-19 07:44:46,777 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:46,879 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2023-11-19 07:44:46,880 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:44:47,870 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2023-11-19 07:44:47,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162914968] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:44:47,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:44:47,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2023-11-19 07:44:47,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999280775] [2023-11-19 07:44:47,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:44:47,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-19 07:44:47,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:47,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-19 07:44:47,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2023-11-19 07:44:47,878 INFO L87 Difference]: Start difference. First operand 152 states and 184 transitions. Second operand has 53 states, 53 states have (on average 2.2641509433962264) internal successors, (120), 53 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:48,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:48,050 INFO L93 Difference]: Finished difference Result 305 states and 394 transitions. [2023-11-19 07:44:48,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-11-19 07:44:48,050 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.2641509433962264) internal successors, (120), 53 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2023-11-19 07:44:48,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:48,053 INFO L225 Difference]: With dead ends: 305 [2023-11-19 07:44:48,053 INFO L226 Difference]: Without dead ends: 204 [2023-11-19 07:44:48,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2023-11-19 07:44:48,057 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 2 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:44:48,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 98 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:44:48,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2023-11-19 07:44:48,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2023-11-19 07:44:48,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.1625615763546797) internal successors, (236), 203 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:48,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 236 transitions. [2023-11-19 07:44:48,075 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 236 transitions. Word has length 107 [2023-11-19 07:44:48,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:48,075 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 236 transitions. [2023-11-19 07:44:48,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.2641509433962264) internal successors, (120), 53 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:48,076 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 236 transitions. [2023-11-19 07:44:48,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2023-11-19 07:44:48,080 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:48,081 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:48,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:48,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 07:44:48,300 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:48,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:48,301 INFO L85 PathProgramCache]: Analyzing trace with hash 521920561, now seen corresponding path program 2 times [2023-11-19 07:44:48,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:48,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115659604] [2023-11-19 07:44:48,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:48,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:48,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:51,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2790 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2023-11-19 07:44:51,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:51,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115659604] [2023-11-19 07:44:51,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115659604] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:44:51,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363234449] [2023-11-19 07:44:51,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:44:51,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:51,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:51,215 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:51,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 07:44:51,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:44:51,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:44:51,458 INFO L262 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-19 07:44:51,462 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:51,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2790 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2023-11-19 07:44:51,638 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:44:55,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2790 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2023-11-19 07:44:55,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363234449] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:44:55,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:44:55,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 105 [2023-11-19 07:44:55,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857329620] [2023-11-19 07:44:55,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:44:55,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2023-11-19 07:44:55,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:55,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2023-11-19 07:44:55,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2023-11-19 07:44:55,558 INFO L87 Difference]: Start difference. First operand 204 states and 236 transitions. Second operand has 105 states, 105 states have (on average 2.1333333333333333) internal successors, (224), 105 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:56,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:56,011 INFO L93 Difference]: Finished difference Result 409 states and 524 transitions. [2023-11-19 07:44:56,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2023-11-19 07:44:56,012 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.1333333333333333) internal successors, (224), 105 states have internal predecessors, (224), 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 159 [2023-11-19 07:44:56,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:56,014 INFO L225 Difference]: With dead ends: 409 [2023-11-19 07:44:56,015 INFO L226 Difference]: Without dead ends: 308 [2023-11-19 07:44:56,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2023-11-19 07:44:56,020 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 2 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:44:56,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 193 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:44:56,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2023-11-19 07:44:56,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2023-11-19 07:44:56,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 1.1074918566775245) internal successors, (340), 307 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:56,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 340 transitions. [2023-11-19 07:44:56,037 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 340 transitions. Word has length 159 [2023-11-19 07:44:56,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:56,038 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 340 transitions. [2023-11-19 07:44:56,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.1333333333333333) internal successors, (224), 105 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:56,038 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 340 transitions. [2023-11-19 07:44:56,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2023-11-19 07:44:56,042 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:56,042 INFO L195 NwaCegarLoop]: trace histogram [102, 102, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:56,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:56,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-19 07:44:56,256 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:56,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:56,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1174170167, now seen corresponding path program 3 times [2023-11-19 07:44:56,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:56,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988070682] [2023-11-19 07:44:56,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:56,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:56,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:05,258 INFO L134 CoverageAnalysis]: Checked inductivity of 10694 backedges. 0 proven. 10404 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2023-11-19 07:45:05,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:05,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988070682] [2023-11-19 07:45:05,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988070682] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:45:05,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420401407] [2023-11-19 07:45:05,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:45:05,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:05,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:45:05,261 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:45:05,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 07:45:05,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-19 07:45:05,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:45:05,517 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-19 07:45:05,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:45:06,874 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:45:06,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 13 [2023-11-19 07:45:06,936 INFO L134 CoverageAnalysis]: Checked inductivity of 10694 backedges. 1 proven. 67 refuted. 0 times theorem prover too weak. 10626 trivial. 0 not checked. [2023-11-19 07:45:06,936 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:45:07,966 INFO L349 Elim1Store]: treesize reduction 13, result has 73.5 percent of original size [2023-11-19 07:45:07,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 49 treesize of output 47 [2023-11-19 07:45:08,145 INFO L134 CoverageAnalysis]: Checked inductivity of 10694 backedges. 13 proven. 55 refuted. 0 times theorem prover too weak. 10626 trivial. 0 not checked. [2023-11-19 07:45:08,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420401407] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:45:08,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:45:08,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 13, 12] total 125 [2023-11-19 07:45:08,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192036293] [2023-11-19 07:45:08,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:45:08,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2023-11-19 07:45:08,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:08,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2023-11-19 07:45:08,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5551, Invalid=9949, Unknown=0, NotChecked=0, Total=15500 [2023-11-19 07:45:08,157 INFO L87 Difference]: Start difference. First operand 308 states and 340 transitions. Second operand has 125 states, 125 states have (on average 2.176) internal successors, (272), 125 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:45:16,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:45:16,025 INFO L93 Difference]: Finished difference Result 473 states and 556 transitions. [2023-11-19 07:45:16,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2023-11-19 07:45:16,026 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 2.176) internal successors, (272), 125 states have internal predecessors, (272), 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 263 [2023-11-19 07:45:16,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:45:16,030 INFO L225 Difference]: With dead ends: 473 [2023-11-19 07:45:16,030 INFO L226 Difference]: Without dead ends: 372 [2023-11-19 07:45:16,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 743 GetRequests, 505 SyntacticMatches, 1 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9276 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=16581, Invalid=40301, Unknown=0, NotChecked=0, Total=56882 [2023-11-19 07:45:16,040 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 74 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 07:45:16,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 270 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 07:45:16,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2023-11-19 07:45:16,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 314. [2023-11-19 07:45:16,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 1.1054313099041533) internal successors, (346), 313 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:45:16,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 346 transitions. [2023-11-19 07:45:16,067 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 346 transitions. Word has length 263 [2023-11-19 07:45:16,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:45:16,068 INFO L495 AbstractCegarLoop]: Abstraction has 314 states and 346 transitions. [2023-11-19 07:45:16,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 2.176) internal successors, (272), 125 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:45:16,069 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 346 transitions. [2023-11-19 07:45:16,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2023-11-19 07:45:16,073 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:45:16,073 INFO L195 NwaCegarLoop]: trace histogram [103, 103, 14, 14, 14, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:45:16,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 07:45:16,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24adee2-f8cc-47b1-b6f6-e3aeb0fe3759/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-19 07:45:16,303 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:45:16,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:16,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1448955069, now seen corresponding path program 4 times [2023-11-19 07:45:16,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:16,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118249246] [2023-11-19 07:45:16,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:16,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:16,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat