./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_copy1_ground-2.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_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/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_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/standard_copy1_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/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_172f8ed9-a57e-4991-84ba-3e856fd56d8c/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 1970a9a8aaeda89e1214c4bedc05560d9ae947bac2f3f8ce77018b7acf727f81 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:00:46,806 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:00:46,875 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 08:00:46,881 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:00:46,882 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:00:46,908 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:00:46,909 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:00:46,910 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:00:46,910 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:00:46,911 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:00:46,912 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:00:46,913 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:00:46,913 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:00:46,914 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:00:46,915 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 08:00:46,915 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:00:46,916 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:00:46,917 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:00:46,917 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:00:46,918 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 08:00:46,918 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:00:46,919 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 08:00:46,920 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:00:46,920 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 08:00:46,921 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:00:46,921 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:00:46,922 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:00:46,922 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:00:46,923 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:00:46,923 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:00:46,924 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:00:46,924 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 08:00:46,925 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:00:46,925 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:00:46,926 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:00:46,926 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 08:00:46,926 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:00:46,927 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:00:46,927 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:00:46,928 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_172f8ed9-a57e-4991-84ba-3e856fd56d8c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1970a9a8aaeda89e1214c4bedc05560d9ae947bac2f3f8ce77018b7acf727f81 [2023-11-19 08:00:47,244 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:00:47,287 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:00:47,289 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:00:47,291 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:00:47,291 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:00:47,293 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/array-examples/standard_copy1_ground-2.i [2023-11-19 08:00:50,497 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:00:50,714 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:00:50,715 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/sv-benchmarks/c/array-examples/standard_copy1_ground-2.i [2023-11-19 08:00:50,723 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/data/eeababd78/1ff021f4276a42cc8412cefee6d7ad92/FLAGf6bb70c24 [2023-11-19 08:00:50,739 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/data/eeababd78/1ff021f4276a42cc8412cefee6d7ad92 [2023-11-19 08:00:50,742 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:00:50,743 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:00:50,745 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:00:50,745 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:00:50,751 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:00:50,752 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:00:50" (1/1) ... [2023-11-19 08:00:50,753 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6673c5aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:50, skipping insertion in model container [2023-11-19 08:00:50,753 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:00:50" (1/1) ... [2023-11-19 08:00:50,776 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:00:50,980 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_172f8ed9-a57e-4991-84ba-3e856fd56d8c/sv-benchmarks/c/array-examples/standard_copy1_ground-2.i[816,829] [2023-11-19 08:00:51,003 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:00:51,015 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:00:51,033 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_172f8ed9-a57e-4991-84ba-3e856fd56d8c/sv-benchmarks/c/array-examples/standard_copy1_ground-2.i[816,829] [2023-11-19 08:00:51,040 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:00:51,056 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:00:51,056 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:51 WrapperNode [2023-11-19 08:00:51,057 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:00:51,058 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:00:51,058 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:00:51,059 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:00:51,067 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:51" (1/1) ... [2023-11-19 08:00:51,074 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:51" (1/1) ... [2023-11-19 08:00:51,094 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2023-11-19 08:00:51,095 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:00:51,096 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:00:51,096 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:00:51,096 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:00:51,106 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:51" (1/1) ... [2023-11-19 08:00:51,107 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:51" (1/1) ... [2023-11-19 08:00:51,109 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:51" (1/1) ... [2023-11-19 08:00:51,109 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:51" (1/1) ... [2023-11-19 08:00:51,115 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:51" (1/1) ... [2023-11-19 08:00:51,118 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:51" (1/1) ... [2023-11-19 08:00:51,120 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:51" (1/1) ... [2023-11-19 08:00:51,121 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:51" (1/1) ... [2023-11-19 08:00:51,123 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:00:51,124 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:00:51,124 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:00:51,124 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:00:51,125 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:51" (1/1) ... [2023-11-19 08:00:51,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:00:51,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:51,155 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:00:51,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:00:51,209 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:00:51,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:00:51,214 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 08:00:51,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 08:00:51,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:00:51,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:00:51,216 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 08:00:51,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 08:00:51,362 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:00:51,363 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:00:51,508 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:00:51,516 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:00:51,517 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-19 08:00:51,520 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:00:51 BoogieIcfgContainer [2023-11-19 08:00:51,521 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:00:51,524 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:00:51,524 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:00:51,528 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:00:51,528 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:00:50" (1/3) ... [2023-11-19 08:00:51,529 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31ae3d9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:00:51, skipping insertion in model container [2023-11-19 08:00:51,530 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:51" (2/3) ... [2023-11-19 08:00:51,530 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31ae3d9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:00:51, skipping insertion in model container [2023-11-19 08:00:51,530 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:00:51" (3/3) ... [2023-11-19 08:00:51,532 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copy1_ground-2.i [2023-11-19 08:00:51,554 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:00:51,555 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 08:00:51,608 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:00:51,616 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;@b56cdc2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:00:51,616 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 08:00:51,620 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:51,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-19 08:00:51,627 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:00:51,628 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:51,629 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:00:51,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:51,635 INFO L85 PathProgramCache]: Analyzing trace with hash -2016449835, now seen corresponding path program 1 times [2023-11-19 08:00:51,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:51,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114001812] [2023-11-19 08:00:51,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:51,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:51,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:51,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:51,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:51,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114001812] [2023-11-19 08:00:51,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114001812] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:51,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:51,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:00:52,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383913505] [2023-11-19 08:00:52,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:52,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:52,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:52,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:52,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:52,061 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 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 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:52,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:00:52,107 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2023-11-19 08:00:52,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:52,109 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2023-11-19 08:00:52,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:00:52,116 INFO L225 Difference]: With dead ends: 34 [2023-11-19 08:00:52,117 INFO L226 Difference]: Without dead ends: 16 [2023-11-19 08:00:52,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:52,123 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:00:52,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 33 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:00:52,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-19 08:00:52,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2023-11-19 08:00:52,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:52,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2023-11-19 08:00:52,157 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2023-11-19 08:00:52,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:00:52,157 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2023-11-19 08:00:52,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:52,158 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2023-11-19 08:00:52,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-19 08:00:52,159 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:00:52,159 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:52,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 08:00:52,160 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:00:52,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:52,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1564645395, now seen corresponding path program 1 times [2023-11-19 08:00:52,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:52,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900661285] [2023-11-19 08:00:52,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:52,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:52,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:52,337 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 08:00:52,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:52,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900661285] [2023-11-19 08:00:52,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900661285] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:00:52,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181069096] [2023-11-19 08:00:52,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:52,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:52,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:52,342 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:52,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 08:00:52,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:52,447 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 08:00:52,452 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:52,481 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 08:00:52,481 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:00:52,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181069096] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:52,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 08:00:52,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-19 08:00:52,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243582330] [2023-11-19 08:00:52,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:52,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:52,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:52,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:52,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:00:52,486 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:52,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:00:52,500 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2023-11-19 08:00:52,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:52,501 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-19 08:00:52,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:00:52,502 INFO L225 Difference]: With dead ends: 24 [2023-11-19 08:00:52,502 INFO L226 Difference]: Without dead ends: 17 [2023-11-19 08:00:52,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 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 08:00:52,504 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:00:52,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 25 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:00:52,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-19 08:00:52,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2023-11-19 08:00:52,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:52,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2023-11-19 08:00:52,511 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 11 [2023-11-19 08:00:52,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:00:52,511 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2023-11-19 08:00:52,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:52,512 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2023-11-19 08:00:52,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-19 08:00:52,513 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:00:52,513 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:52,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:52,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:52,726 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:00:52,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:52,727 INFO L85 PathProgramCache]: Analyzing trace with hash 2031054225, now seen corresponding path program 1 times [2023-11-19 08:00:52,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:52,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517621346] [2023-11-19 08:00:52,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:52,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:52,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:52,894 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 08:00:52,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:52,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517621346] [2023-11-19 08:00:52,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517621346] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:00:52,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320779174] [2023-11-19 08:00:52,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:52,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:52,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:52,903 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:52,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 08:00:52,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:52,975 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 08:00:52,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:53,042 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 08:00:53,048 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:53,077 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 08:00:53,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320779174] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:00:53,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:00:53,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-19 08:00:53,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494392409] [2023-11-19 08:00:53,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:00:53,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 08:00:53,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:53,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 08:00:53,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:00:53,082 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:53,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:00:53,121 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2023-11-19 08:00:53,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 08:00:53,122 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-19 08:00:53,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:00:53,123 INFO L225 Difference]: With dead ends: 33 [2023-11-19 08:00:53,123 INFO L226 Difference]: Without dead ends: 22 [2023-11-19 08:00:53,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:00:53,125 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 2 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:00:53,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 62 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:00:53,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-19 08:00:53,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-11-19 08:00:53,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:53,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2023-11-19 08:00:53,132 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 13 [2023-11-19 08:00:53,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:00:53,132 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2023-11-19 08:00:53,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:53,133 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2023-11-19 08:00:53,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-19 08:00:53,133 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:00:53,134 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:53,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:53,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:53,345 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:00:53,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:53,346 INFO L85 PathProgramCache]: Analyzing trace with hash 2021040587, now seen corresponding path program 2 times [2023-11-19 08:00:53,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:53,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832569631] [2023-11-19 08:00:53,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:53,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:53,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:53,524 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-19 08:00:53,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:53,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832569631] [2023-11-19 08:00:53,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832569631] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:00:53,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106058736] [2023-11-19 08:00:53,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 08:00:53,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:53,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:53,528 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:53,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 08:00:53,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 08:00:53,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:00:53,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 08:00:53,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:53,751 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:00:53,752 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:53,878 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:00:53,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106058736] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:00:53,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:00:53,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2023-11-19 08:00:53,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094452435] [2023-11-19 08:00:53,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:00:53,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 08:00:53,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:53,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 08:00:53,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-19 08:00:53,888 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:53,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:00:53,977 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2023-11-19 08:00:53,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 08:00:53,978 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-19 08:00:53,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:00:53,980 INFO L225 Difference]: With dead ends: 48 [2023-11-19 08:00:53,981 INFO L226 Difference]: Without dead ends: 37 [2023-11-19 08:00:53,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 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 08:00:53,987 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:00:53,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 50 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:00:53,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-19 08:00:54,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2023-11-19 08:00:54,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:54,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2023-11-19 08:00:54,005 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 19 [2023-11-19 08:00:54,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:00:54,005 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2023-11-19 08:00:54,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:54,006 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2023-11-19 08:00:54,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-19 08:00:54,007 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:00:54,007 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:54,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:54,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:54,229 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:00:54,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:54,230 INFO L85 PathProgramCache]: Analyzing trace with hash 709790269, now seen corresponding path program 3 times [2023-11-19 08:00:54,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:54,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483682503] [2023-11-19 08:00:54,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:54,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:54,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:54,653 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 08:00:54,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:54,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483682503] [2023-11-19 08:00:54,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483682503] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:00:54,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277601575] [2023-11-19 08:00:54,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 08:00:54,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:54,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:54,657 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:54,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 08:00:54,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 08:00:54,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:00:54,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 08:00:54,761 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:54,803 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-19 08:00:54,804 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:54,854 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-19 08:00:54,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277601575] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:00:54,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:00:54,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2023-11-19 08:00:54,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401796412] [2023-11-19 08:00:54,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:00:54,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-19 08:00:54,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:54,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-19 08:00:54,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-11-19 08:00:54,858 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:54,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:00:54,958 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2023-11-19 08:00:54,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-19 08:00:54,959 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 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 33 [2023-11-19 08:00:54,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:00:54,966 INFO L225 Difference]: With dead ends: 60 [2023-11-19 08:00:54,967 INFO L226 Difference]: Without dead ends: 47 [2023-11-19 08:00:54,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-11-19 08:00:54,968 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:00:54,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 69 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:00:54,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-19 08:00:54,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2023-11-19 08:00:54,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 45 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:54,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2023-11-19 08:00:54,986 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 33 [2023-11-19 08:00:54,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:00:54,986 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2023-11-19 08:00:54,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:54,986 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2023-11-19 08:00:54,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-19 08:00:54,989 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:00:54,989 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:55,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:55,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:55,206 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:00:55,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:55,207 INFO L85 PathProgramCache]: Analyzing trace with hash -593240461, now seen corresponding path program 4 times [2023-11-19 08:00:55,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:55,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805063417] [2023-11-19 08:00:55,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:55,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:55,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:55,576 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-19 08:00:55,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:55,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805063417] [2023-11-19 08:00:55,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805063417] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:00:55,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905795099] [2023-11-19 08:00:55,577 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 08:00:55,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:55,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:55,579 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:55,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 08:00:55,716 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 08:00:55,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:00:55,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 08:00:55,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:55,834 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-11-19 08:00:55,834 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:55,999 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-11-19 08:00:55,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905795099] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:00:55,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:00:55,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 28 [2023-11-19 08:00:55,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446121460] [2023-11-19 08:00:56,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:00:56,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-19 08:00:56,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:56,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-19 08:00:56,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2023-11-19 08:00:56,002 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:56,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:00:56,136 INFO L93 Difference]: Finished difference Result 86 states and 98 transitions. [2023-11-19 08:00:56,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-19 08:00:56,136 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-11-19 08:00:56,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:00:56,139 INFO L225 Difference]: With dead ends: 86 [2023-11-19 08:00:56,139 INFO L226 Difference]: Without dead ends: 65 [2023-11-19 08:00:56,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2023-11-19 08:00:56,143 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:00:56,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 69 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:00:56,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-19 08:00:56,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2023-11-19 08:00:56,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 63 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:56,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2023-11-19 08:00:56,156 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 43 [2023-11-19 08:00:56,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:00:56,156 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2023-11-19 08:00:56,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:56,157 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2023-11-19 08:00:56,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-19 08:00:56,160 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:00:56,160 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:56,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:56,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 08:00:56,369 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:00:56,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:56,370 INFO L85 PathProgramCache]: Analyzing trace with hash 65706529, now seen corresponding path program 5 times [2023-11-19 08:00:56,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:56,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881111882] [2023-11-19 08:00:56,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:56,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:56,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:56,912 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2023-11-19 08:00:56,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:56,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881111882] [2023-11-19 08:00:56,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881111882] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:00:56,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328479427] [2023-11-19 08:00:56,913 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 08:00:56,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:56,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:56,915 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:56,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 08:00:58,785 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2023-11-19 08:00:58,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:00:58,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-19 08:00:58,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:59,128 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-11-19 08:00:59,128 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:59,711 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-11-19 08:00:59,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328479427] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:00:59,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:00:59,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 45 [2023-11-19 08:00:59,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392305846] [2023-11-19 08:00:59,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:00:59,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-19 08:00:59,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:59,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-19 08:00:59,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=1380, Unknown=0, NotChecked=0, Total=1980 [2023-11-19 08:00:59,716 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand has 45 states, 45 states have (on average 2.2) internal successors, (99), 45 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:59,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:00:59,916 INFO L93 Difference]: Finished difference Result 136 states and 156 transitions. [2023-11-19 08:00:59,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-19 08:00:59,917 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.2) internal successors, (99), 45 states have internal predecessors, (99), 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 61 [2023-11-19 08:00:59,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:00:59,922 INFO L225 Difference]: With dead ends: 136 [2023-11-19 08:00:59,923 INFO L226 Difference]: Without dead ends: 99 [2023-11-19 08:00:59,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=600, Invalid=1380, Unknown=0, NotChecked=0, Total=1980 [2023-11-19 08:00:59,925 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 08:00:59,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 70 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 08:00:59,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-11-19 08:00:59,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2023-11-19 08:00:59,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 97 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:59,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2023-11-19 08:00:59,954 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 61 [2023-11-19 08:00:59,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:00:59,956 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2023-11-19 08:00:59,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.2) internal successors, (99), 45 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:59,957 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2023-11-19 08:00:59,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-19 08:00:59,961 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:00:59,962 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:59,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:00,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:00,173 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:01:00,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:00,173 INFO L85 PathProgramCache]: Analyzing trace with hash -342693825, now seen corresponding path program 6 times [2023-11-19 08:01:00,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:00,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509228245] [2023-11-19 08:01:00,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:00,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:00,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:00,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1069 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2023-11-19 08:01:00,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:00,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509228245] [2023-11-19 08:01:00,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509228245] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:01:00,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972690000] [2023-11-19 08:01:00,719 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-19 08:01:00,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:00,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:00,721 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:00,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 08:01:02,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2023-11-19 08:01:02,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:01:02,514 INFO L262 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 08:01:02,519 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:02,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1069 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2023-11-19 08:01:02,577 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:01:02,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1069 backedges. 0 proven. 228 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2023-11-19 08:01:02,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972690000] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:01:02,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:01:02,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 18] total 33 [2023-11-19 08:01:02,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598202024] [2023-11-19 08:01:02,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:01:02,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-19 08:01:02,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:02,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-19 08:01:02,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2023-11-19 08:01:02,992 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 33 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:03,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:01:03,144 INFO L93 Difference]: Finished difference Result 197 states and 215 transitions. [2023-11-19 08:01:03,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-19 08:01:03,144 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 33 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2023-11-19 08:01:03,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:01:03,147 INFO L225 Difference]: With dead ends: 197 [2023-11-19 08:01:03,147 INFO L226 Difference]: Without dead ends: 128 [2023-11-19 08:01:03,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2023-11-19 08:01:03,152 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 5 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:01:03,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 51 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:01:03,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-11-19 08:01:03,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2023-11-19 08:01:03,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.0236220472440944) internal successors, (130), 127 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:03,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2023-11-19 08:01:03,177 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 95 [2023-11-19 08:01:03,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:01:03,177 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2023-11-19 08:01:03,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 33 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:03,178 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2023-11-19 08:01:03,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-11-19 08:01:03,184 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:01:03,184 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:03,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:03,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-19 08:01:03,402 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:01:03,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:03,403 INFO L85 PathProgramCache]: Analyzing trace with hash 819713505, now seen corresponding path program 7 times [2023-11-19 08:01:03,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:03,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917279730] [2023-11-19 08:01:03,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:03,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:03,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:04,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1684 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2023-11-19 08:01:04,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:04,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917279730] [2023-11-19 08:01:04,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917279730] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:01:04,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569550202] [2023-11-19 08:01:04,867 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 08:01:04,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:04,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:04,869 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:04,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 08:01:05,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:05,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-19 08:01:05,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:05,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1684 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2023-11-19 08:01:05,253 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:01:06,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1684 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2023-11-19 08:01:06,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569550202] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:01:06,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:01:06,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 61 [2023-11-19 08:01:06,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926013092] [2023-11-19 08:01:06,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:01:06,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-11-19 08:01:06,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:06,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-11-19 08:01:06,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2023-11-19 08:01:06,629 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand has 61 states, 61 states have (on average 2.098360655737705) internal successors, (128), 61 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:06,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:01:06,874 INFO L93 Difference]: Finished difference Result 257 states and 290 transitions. [2023-11-19 08:01:06,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-11-19 08:01:06,874 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.098360655737705) internal successors, (128), 61 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2023-11-19 08:01:06,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:01:06,877 INFO L225 Difference]: With dead ends: 257 [2023-11-19 08:01:06,877 INFO L226 Difference]: Without dead ends: 188 [2023-11-19 08:01:06,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2023-11-19 08:01:06,884 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 2 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 08:01:06,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 74 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 08:01:06,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-11-19 08:01:06,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2023-11-19 08:01:06,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.0160427807486632) internal successors, (190), 187 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:06,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 190 transitions. [2023-11-19 08:01:06,903 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 190 transitions. Word has length 125 [2023-11-19 08:01:06,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:01:06,907 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 190 transitions. [2023-11-19 08:01:06,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.098360655737705) internal successors, (128), 61 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:06,908 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 190 transitions. [2023-11-19 08:01:06,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2023-11-19 08:01:06,910 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:01:06,910 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:06,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:07,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:07,129 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:01:07,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:07,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1843021147, now seen corresponding path program 8 times [2023-11-19 08:01:07,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:07,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025741202] [2023-11-19 08:01:07,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:07,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:07,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:11,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4264 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2023-11-19 08:01:11,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:11,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025741202] [2023-11-19 08:01:11,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025741202] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:01:11,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181240844] [2023-11-19 08:01:11,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 08:01:11,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:11,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:11,332 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:11,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 08:01:11,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 08:01:11,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:01:11,739 INFO L262 TraceCheckSpWp]: Trace formula consists of 1081 conjuncts, 60 conjunts are in the unsatisfiable core [2023-11-19 08:01:11,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:11,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4264 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2023-11-19 08:01:11,960 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:01:16,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4264 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2023-11-19 08:01:16,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181240844] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:01:16,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:01:16,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 121 [2023-11-19 08:01:16,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752143496] [2023-11-19 08:01:16,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:01:16,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2023-11-19 08:01:16,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:16,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2023-11-19 08:01:16,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7260, Invalid=7260, Unknown=0, NotChecked=0, Total=14520 [2023-11-19 08:01:16,782 INFO L87 Difference]: Start difference. First operand 188 states and 190 transitions. Second operand has 121 states, 121 states have (on average 2.049586776859504) internal successors, (248), 121 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:17,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:01:17,377 INFO L93 Difference]: Finished difference Result 377 states and 440 transitions. [2023-11-19 08:01:17,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2023-11-19 08:01:17,378 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 2.049586776859504) internal successors, (248), 121 states have internal predecessors, (248), 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 185 [2023-11-19 08:01:17,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:01:17,382 INFO L225 Difference]: With dead ends: 377 [2023-11-19 08:01:17,382 INFO L226 Difference]: Without dead ends: 308 [2023-11-19 08:01:17,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=7260, Invalid=7260, Unknown=0, NotChecked=0, Total=14520 [2023-11-19 08:01:17,389 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 2 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 08:01:17,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 98 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 08:01:17,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2023-11-19 08:01:17,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2023-11-19 08:01:17,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 1.009771986970684) internal successors, (310), 307 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:17,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 310 transitions. [2023-11-19 08:01:17,405 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 310 transitions. Word has length 185 [2023-11-19 08:01:17,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:01:17,406 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 310 transitions. [2023-11-19 08:01:17,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 2.049586776859504) internal successors, (248), 121 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:17,407 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 310 transitions. [2023-11-19 08:01:17,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2023-11-19 08:01:17,411 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:01:17,412 INFO L195 NwaCegarLoop]: trace histogram [118, 118, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:17,439 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-19 08:01:17,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:17,635 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:01:17,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:17,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1223502381, now seen corresponding path program 9 times [2023-11-19 08:01:17,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:17,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711493599] [2023-11-19 08:01:17,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:17,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:17,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:30,340 INFO L134 CoverageAnalysis]: Checked inductivity of 14824 backedges. 0 proven. 13924 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2023-11-19 08:01:30,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:30,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711493599] [2023-11-19 08:01:30,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711493599] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:01:30,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019259964] [2023-11-19 08:01:30,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 08:01:30,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:30,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:30,342 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:30,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_172f8ed9-a57e-4991-84ba-3e856fd56d8c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process