./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/sorting_bubblesort_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/sorting_bubblesort_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2719a9efd2165050483c20571c85746fdd7204d074459e12a38b31692a3fffb0 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:51:34,850 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:51:34,916 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:51:34,921 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:51:34,922 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:51:34,947 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:51:34,948 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:51:34,949 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:51:34,949 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:51:34,950 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:51:34,951 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:51:34,952 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:51:34,952 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:51:34,953 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:51:34,953 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:51:34,954 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:51:34,955 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:51:34,955 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:51:34,956 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:51:34,956 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:51:34,957 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:51:34,958 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:51:34,958 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:51:34,959 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:51:34,959 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:51:34,960 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:51:34,961 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:51:34,961 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:51:34,962 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:51:34,962 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:51:34,963 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:51:34,963 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:51:34,964 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:51:34,964 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:51:34,964 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:51:34,965 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:51:34,965 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:51:34,966 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:51:34,966 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:51:34,966 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_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2719a9efd2165050483c20571c85746fdd7204d074459e12a38b31692a3fffb0 [2023-11-06 22:51:35,228 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:51:35,260 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:51:35,262 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:51:35,264 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:51:35,264 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:51:35,266 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/array-examples/sorting_bubblesort_ground-2.i [2023-11-06 22:51:38,302 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:51:38,560 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:51:38,560 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/sv-benchmarks/c/array-examples/sorting_bubblesort_ground-2.i [2023-11-06 22:51:38,567 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/data/e39c5a7ba/1f6e0d4e348845c989ae825912fa42c8/FLAG49a1bb33a [2023-11-06 22:51:38,586 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/data/e39c5a7ba/1f6e0d4e348845c989ae825912fa42c8 [2023-11-06 22:51:38,594 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:51:38,596 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:51:38,598 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:51:38,598 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:51:38,604 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:51:38,607 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:51:38" (1/1) ... [2023-11-06 22:51:38,609 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ddc6299 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:38, skipping insertion in model container [2023-11-06 22:51:38,609 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:51:38" (1/1) ... [2023-11-06 22:51:38,636 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:51:38,804 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_2a21b633-3121-429d-92a0-5f393721ab89/sv-benchmarks/c/array-examples/sorting_bubblesort_ground-2.i[820,833] [2023-11-06 22:51:38,822 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:51:38,832 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:51:38,845 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_2a21b633-3121-429d-92a0-5f393721ab89/sv-benchmarks/c/array-examples/sorting_bubblesort_ground-2.i[820,833] [2023-11-06 22:51:38,854 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:51:38,869 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:51:38,869 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:38 WrapperNode [2023-11-06 22:51:38,869 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:51:38,870 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:51:38,870 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:51:38,871 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:51:38,878 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:38" (1/1) ... [2023-11-06 22:51:38,885 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:38" (1/1) ... [2023-11-06 22:51:38,906 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2023-11-06 22:51:38,907 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:51:38,908 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:51:38,908 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:51:38,908 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:51:38,917 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:38" (1/1) ... [2023-11-06 22:51:38,917 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:38" (1/1) ... [2023-11-06 22:51:38,919 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:38" (1/1) ... [2023-11-06 22:51:38,919 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:38" (1/1) ... [2023-11-06 22:51:38,925 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:38" (1/1) ... [2023-11-06 22:51:38,929 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:38" (1/1) ... [2023-11-06 22:51:38,930 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:38" (1/1) ... [2023-11-06 22:51:38,931 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:38" (1/1) ... [2023-11-06 22:51:38,934 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:51:38,935 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:51:38,935 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:51:38,935 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:51:38,936 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:38" (1/1) ... [2023-11-06 22:51:38,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:51:38,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:51:38,976 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:51:38,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:51:39,024 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:51:39,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:51:39,025 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:51:39,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:51:39,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:51:39,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:51:39,027 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:51:39,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:51:39,101 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:51:39,104 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:51:39,253 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:51:39,267 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:51:39,267 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-06 22:51:39,281 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:51:39 BoogieIcfgContainer [2023-11-06 22:51:39,281 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:51:39,283 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:51:39,283 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:51:39,287 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:51:39,287 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:51:38" (1/3) ... [2023-11-06 22:51:39,288 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79a68561 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:51:39, skipping insertion in model container [2023-11-06 22:51:39,288 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:38" (2/3) ... [2023-11-06 22:51:39,289 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79a68561 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:51:39, skipping insertion in model container [2023-11-06 22:51:39,289 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:51:39" (3/3) ... [2023-11-06 22:51:39,290 INFO L112 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_ground-2.i [2023-11-06 22:51:39,311 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:51:39,312 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:51:39,365 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:51:39,377 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@339222f0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:51:39,378 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:51:39,383 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.619047619047619) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:51:39,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-06 22:51:39,391 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:51:39,392 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:51:39,393 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:51:39,405 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:51:39,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1961330543, now seen corresponding path program 1 times [2023-11-06 22:51:39,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:51:39,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954992772] [2023-11-06 22:51:39,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:51:39,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:51:39,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:51:39,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:51:39,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:51:39,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954992772] [2023-11-06 22:51:39,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954992772] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:51:39,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:51:39,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:51:39,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263556036] [2023-11-06 22:51:39,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:51:39,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:51:39,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:51:39,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:51:39,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:51:39,721 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.619047619047619) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:51:39,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:51:39,752 INFO L93 Difference]: Finished difference Result 44 states and 66 transitions. [2023-11-06 22:51:39,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:51:39,762 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-06 22:51:39,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:51:39,770 INFO L225 Difference]: With dead ends: 44 [2023-11-06 22:51:39,772 INFO L226 Difference]: Without dead ends: 21 [2023-11-06 22:51:39,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:51:39,780 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:51:39,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 48 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:51:39,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-06 22:51:39,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2023-11-06 22:51:39,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:51:39,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2023-11-06 22:51:39,819 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 10 [2023-11-06 22:51:39,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:51:39,820 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2023-11-06 22:51:39,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:51:39,821 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2023-11-06 22:51:39,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-06 22:51:39,822 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:51:39,822 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:51:39,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:51:39,823 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:51:39,824 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:51:39,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1306132977, now seen corresponding path program 1 times [2023-11-06 22:51:39,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:51:39,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065863825] [2023-11-06 22:51:39,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:51:39,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:51:39,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:51:39,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:51:39,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:51:39,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065863825] [2023-11-06 22:51:39,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065863825] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:51:39,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689638157] [2023-11-06 22:51:39,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:51:39,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:51:39,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:51:39,967 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:51:39,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:51:40,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:51:40,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:51:40,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:51:40,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:51:40,103 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:51:40,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689638157] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:51:40,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:51:40,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-06 22:51:40,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71493513] [2023-11-06 22:51:40,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:51:40,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:51:40,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:51:40,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:51:40,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:51:40,107 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:51:40,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:51:40,121 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2023-11-06 22:51:40,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:51:40,122 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-06 22:51:40,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:51:40,123 INFO L225 Difference]: With dead ends: 34 [2023-11-06 22:51:40,123 INFO L226 Difference]: Without dead ends: 25 [2023-11-06 22:51:40,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:51:40,125 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 5 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:51:40,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 47 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:51:40,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-06 22:51:40,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-11-06 22:51:40,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:51:40,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2023-11-06 22:51:40,132 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 12 [2023-11-06 22:51:40,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:51:40,133 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2023-11-06 22:51:40,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:51:40,134 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2023-11-06 22:51:40,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-06 22:51:40,134 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:51:40,135 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:51:40,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:51:40,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:51:40,341 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:51:40,342 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:51:40,342 INFO L85 PathProgramCache]: Analyzing trace with hash 735433629, now seen corresponding path program 1 times [2023-11-06 22:51:40,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:51:40,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641532791] [2023-11-06 22:51:40,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:51:40,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:51:40,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:51:40,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:51:40,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:51:40,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641532791] [2023-11-06 22:51:40,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641532791] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:51:40,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412857227] [2023-11-06 22:51:40,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:51:40,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:51:40,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:51:40,479 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:51:40,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:51:40,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:51:40,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:51:40,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:51:40,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:51:40,584 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:51:40,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412857227] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:51:40,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:51:40,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-06 22:51:40,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214205459] [2023-11-06 22:51:40,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:51:40,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:51:40,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:51:40,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:51:40,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:51:40,587 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:51:40,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:51:40,618 INFO L93 Difference]: Finished difference Result 48 states and 63 transitions. [2023-11-06 22:51:40,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:51:40,619 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-06 22:51:40,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:51:40,622 INFO L225 Difference]: With dead ends: 48 [2023-11-06 22:51:40,622 INFO L226 Difference]: Without dead ends: 29 [2023-11-06 22:51:40,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:51:40,626 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 3 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:51:40,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 38 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:51:40,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-06 22:51:40,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2023-11-06 22:51:40,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:51:40,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2023-11-06 22:51:40,634 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 15 [2023-11-06 22:51:40,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:51:40,634 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2023-11-06 22:51:40,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:51:40,635 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2023-11-06 22:51:40,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-06 22:51:40,636 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:51:40,636 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:51:40,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:51:40,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:51:40,838 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:51:40,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:51:40,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1537360201, now seen corresponding path program 1 times [2023-11-06 22:51:40,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:51:40,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798642167] [2023-11-06 22:51:40,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:51:40,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:51:40,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:51:40,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:51:40,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:51:40,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798642167] [2023-11-06 22:51:40,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798642167] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:51:40,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303265275] [2023-11-06 22:51:40,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:51:40,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:51:40,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:51:40,912 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:51:40,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:51:40,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:51:40,994 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:51:40,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:51:41,043 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:51:41,043 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:51:41,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:51:41,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303265275] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:51:41,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:51:41,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-06 22:51:41,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449725481] [2023-11-06 22:51:41,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:51:41,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:51:41,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:51:41,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:51:41,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:51:41,071 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:51:41,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:51:41,098 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2023-11-06 22:51:41,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:51:41,099 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-06 22:51:41,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:51:41,100 INFO L225 Difference]: With dead ends: 53 [2023-11-06 22:51:41,100 INFO L226 Difference]: Without dead ends: 32 [2023-11-06 22:51:41,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:51:41,102 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 2 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:51:41,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 60 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:51:41,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-06 22:51:41,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-11-06 22:51:41,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:51:41,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2023-11-06 22:51:41,109 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 18 [2023-11-06 22:51:41,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:51:41,109 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2023-11-06 22:51:41,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:51:41,110 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2023-11-06 22:51:41,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-06 22:51:41,111 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:51:41,111 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:51:41,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:51:41,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:51:41,317 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:51:41,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:51:41,318 INFO L85 PathProgramCache]: Analyzing trace with hash 60072271, now seen corresponding path program 2 times [2023-11-06 22:51:41,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:51:41,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340158827] [2023-11-06 22:51:41,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:51:41,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:51:41,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:51:41,412 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-06 22:51:41,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:51:41,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340158827] [2023-11-06 22:51:41,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340158827] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:51:41,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520504613] [2023-11-06 22:51:41,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:51:41,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:51:41,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:51:41,415 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:51:41,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:51:41,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:51:41,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:51:41,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:51:41,516 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:51:41,589 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:51:41,589 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:51:41,672 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:51:41,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520504613] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:51:41,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:51:41,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2023-11-06 22:51:41,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912705268] [2023-11-06 22:51:41,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:51:41,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:51:41,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:51:41,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:51:41,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:51:41,676 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:51:41,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:51:41,752 INFO L93 Difference]: Finished difference Result 74 states and 98 transitions. [2023-11-06 22:51:41,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:51:41,753 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-11-06 22:51:41,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:51:41,754 INFO L225 Difference]: With dead ends: 74 [2023-11-06 22:51:41,755 INFO L226 Difference]: Without dead ends: 53 [2023-11-06 22:51:41,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:51:41,756 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 7 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:51:41,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 115 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:51:41,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-06 22:51:41,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2023-11-06 22:51:41,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:51:41,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2023-11-06 22:51:41,765 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 24 [2023-11-06 22:51:41,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:51:41,765 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2023-11-06 22:51:41,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:51:41,766 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2023-11-06 22:51:41,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-06 22:51:41,767 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:51:41,767 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:51:41,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:51:41,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:51:41,973 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:51:41,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:51:41,974 INFO L85 PathProgramCache]: Analyzing trace with hash 2139379787, now seen corresponding path program 3 times [2023-11-06 22:51:41,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:51:41,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229501955] [2023-11-06 22:51:41,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:51:41,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:51:42,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:51:42,282 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-06 22:51:42,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:51:42,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229501955] [2023-11-06 22:51:42,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229501955] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:51:42,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318369368] [2023-11-06 22:51:42,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:51:42,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:51:42,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:51:42,287 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:51:42,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:51:42,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-06 22:51:42,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:51:42,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:51:42,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:51:42,424 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-06 22:51:42,424 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:51:42,465 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-06 22:51:42,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318369368] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:51:42,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:51:42,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-11-06 22:51:42,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967546570] [2023-11-06 22:51:42,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:51:42,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 22:51:42,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:51:42,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 22:51:42,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:51:42,473 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:51:42,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:51:42,533 INFO L93 Difference]: Finished difference Result 98 states and 129 transitions. [2023-11-06 22:51:42,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:51:42,533 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-11-06 22:51:42,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:51:42,540 INFO L225 Difference]: With dead ends: 98 [2023-11-06 22:51:42,541 INFO L226 Difference]: Without dead ends: 73 [2023-11-06 22:51:42,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:51:42,543 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:51:42,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 59 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:51:42,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-11-06 22:51:42,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2023-11-06 22:51:42,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.2361111111111112) internal successors, (89), 72 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:51:42,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 89 transitions. [2023-11-06 22:51:42,567 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 89 transitions. Word has length 39 [2023-11-06 22:51:42,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:51:42,568 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 89 transitions. [2023-11-06 22:51:42,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:51:42,569 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 89 transitions. [2023-11-06 22:51:42,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-06 22:51:42,572 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:51:42,572 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:51:42,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-06 22:51:42,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 22:51:42,780 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:51:42,780 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:51:42,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1707834293, now seen corresponding path program 4 times [2023-11-06 22:51:42,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:51:42,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259734906] [2023-11-06 22:51:42,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:51:42,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:51:42,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:51:43,216 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-06 22:51:43,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:51:43,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259734906] [2023-11-06 22:51:43,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259734906] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:51:43,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699951353] [2023-11-06 22:51:43,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:51:43,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:51:43,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:51:43,223 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:51:43,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:51:43,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:51:43,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:51:43,335 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:51:43,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:51:43,412 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-06 22:51:43,412 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:51:43,703 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-06 22:51:43,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699951353] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:51:43,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:51:43,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-11-06 22:51:43,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440635062] [2023-11-06 22:51:43,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:51:43,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:51:43,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:51:43,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:51:43,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:51:43,707 INFO L87 Difference]: Start difference. First operand 73 states and 89 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:51:43,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:51:43,814 INFO L93 Difference]: Finished difference Result 147 states and 190 transitions. [2023-11-06 22:51:43,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 22:51:43,815 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2023-11-06 22:51:43,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:51:43,816 INFO L225 Difference]: With dead ends: 147 [2023-11-06 22:51:43,816 INFO L226 Difference]: Without dead ends: 97 [2023-11-06 22:51:43,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:51:43,821 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 2 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:51:43,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 98 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:51:43,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-11-06 22:51:43,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2023-11-06 22:51:43,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:51:43,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2023-11-06 22:51:43,847 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 51 [2023-11-06 22:51:43,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:51:43,848 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2023-11-06 22:51:43,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:51:43,849 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2023-11-06 22:51:43,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-06 22:51:43,850 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:51:43,850 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:51:43,857 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-06 22:51:44,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:51:44,057 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:51:44,058 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:51:44,058 INFO L85 PathProgramCache]: Analyzing trace with hash -56741325, now seen corresponding path program 5 times [2023-11-06 22:51:44,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:51:44,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375950981] [2023-11-06 22:51:44,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:51:44,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:51:44,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:51:44,942 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-06 22:51:44,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:51:44,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375950981] [2023-11-06 22:51:44,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375950981] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:51:44,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539002126] [2023-11-06 22:51:44,943 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:51:44,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:51:44,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:51:44,945 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:51:44,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:51:45,484 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2023-11-06 22:51:45,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:51:45,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:51:45,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:51:45,654 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2023-11-06 22:51:45,654 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:51:45,874 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2023-11-06 22:51:45,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539002126] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:51:45,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:51:45,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9, 9] total 39 [2023-11-06 22:51:45,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882368633] [2023-11-06 22:51:45,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:51:45,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-06 22:51:45,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:51:45,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-06 22:51:45,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1063, Unknown=0, NotChecked=0, Total=1482 [2023-11-06 22:51:45,877 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 39 states, 39 states have (on average 2.6923076923076925) internal successors, (105), 39 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:51:46,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:51:46,079 INFO L93 Difference]: Finished difference Result 198 states and 262 transitions. [2023-11-06 22:51:46,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-06 22:51:46,080 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.6923076923076925) internal successors, (105), 39 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2023-11-06 22:51:46,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:51:46,082 INFO L225 Difference]: With dead ends: 198 [2023-11-06 22:51:46,082 INFO L226 Difference]: Without dead ends: 148 [2023-11-06 22:51:46,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=419, Invalid=1063, Unknown=0, NotChecked=0, Total=1482 [2023-11-06 22:51:46,084 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 35 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:51:46,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 150 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:51:46,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-11-06 22:51:46,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2023-11-06 22:51:46,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.226027397260274) internal successors, (179), 146 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:51:46,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 179 transitions. [2023-11-06 22:51:46,097 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 179 transitions. Word has length 75 [2023-11-06 22:51:46,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:51:46,097 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 179 transitions. [2023-11-06 22:51:46,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.6923076923076925) internal successors, (105), 39 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:51:46,098 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 179 transitions. [2023-11-06 22:51:46,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-11-06 22:51:46,100 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:51:46,100 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:51:46,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:51:46,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:51:46,307 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:51:46,308 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:51:46,308 INFO L85 PathProgramCache]: Analyzing trace with hash -315531791, now seen corresponding path program 6 times [2023-11-06 22:51:46,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:51:46,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936385217] [2023-11-06 22:51:46,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:51:46,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:51:46,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:51:47,168 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2023-11-06 22:51:47,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:51:47,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936385217] [2023-11-06 22:51:47,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936385217] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:51:47,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463769894] [2023-11-06 22:51:47,169 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:51:47,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:51:47,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:51:47,170 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:51:47,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:51:49,137 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2023-11-06 22:51:49,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:51:49,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 22:51:49,148 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:51:49,567 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2023-11-06 22:51:49,567 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:51:50,204 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2023-11-06 22:51:50,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463769894] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:51:50,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:51:50,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 17, 17] total 56 [2023-11-06 22:51:50,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253923318] [2023-11-06 22:51:50,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:51:50,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-11-06 22:51:50,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:51:50,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-11-06 22:51:50,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=2260, Unknown=0, NotChecked=0, Total=3080 [2023-11-06 22:51:50,210 INFO L87 Difference]: Start difference. First operand 147 states and 179 transitions. Second operand has 56 states, 56 states have (on average 2.767857142857143) internal successors, (155), 56 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:51:50,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:51:50,525 INFO L93 Difference]: Finished difference Result 344 states and 472 transitions. [2023-11-06 22:51:50,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-11-06 22:51:50,525 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.767857142857143) internal successors, (155), 56 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2023-11-06 22:51:50,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:51:50,527 INFO L225 Difference]: With dead ends: 344 [2023-11-06 22:51:50,528 INFO L226 Difference]: Without dead ends: 246 [2023-11-06 22:51:50,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=820, Invalid=2260, Unknown=0, NotChecked=0, Total=3080 [2023-11-06 22:51:50,531 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 83 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:51:50,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 228 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:51:50,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2023-11-06 22:51:50,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 245. [2023-11-06 22:51:50,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 1.2663934426229508) internal successors, (309), 244 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:51:50,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 309 transitions. [2023-11-06 22:51:50,570 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 309 transitions. Word has length 101 [2023-11-06 22:51:50,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:51:50,570 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 309 transitions. [2023-11-06 22:51:50,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.767857142857143) internal successors, (155), 56 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:51:50,571 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 309 transitions. [2023-11-06 22:51:50,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-11-06 22:51:50,577 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:51:50,578 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:51:50,586 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-06 22:51:50,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:51:50,786 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:51:50,787 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:51:50,787 INFO L85 PathProgramCache]: Analyzing trace with hash 150161967, now seen corresponding path program 7 times [2023-11-06 22:51:50,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:51:50,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496264639] [2023-11-06 22:51:50,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:51:50,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:51:50,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:51:51,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1912 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2023-11-06 22:51:51,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:51:51,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496264639] [2023-11-06 22:51:51,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496264639] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:51:51,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221644699] [2023-11-06 22:51:51,910 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:51:51,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:51:51,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:51:51,912 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:51:51,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:51:52,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:51:52,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 22:51:52,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:51:52,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1912 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2023-11-06 22:51:52,216 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:51:53,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1912 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2023-11-06 22:51:53,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221644699] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:51:53,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:51:53,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2023-11-06 22:51:53,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857285471] [2023-11-06 22:51:53,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:51:53,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-06 22:51:53,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:51:53,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-06 22:51:53,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2023-11-06 22:51:53,264 INFO L87 Difference]: Start difference. First operand 245 states and 309 transitions. Second operand has 53 states, 53 states have (on average 2.207547169811321) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:51:53,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:51:53,433 INFO L93 Difference]: Finished difference Result 491 states and 644 transitions. [2023-11-06 22:51:53,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-11-06 22:51:53,433 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.207547169811321) internal successors, (117), 53 states have internal predecessors, (117), 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 151 [2023-11-06 22:51:53,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:51:53,436 INFO L225 Difference]: With dead ends: 491 [2023-11-06 22:51:53,436 INFO L226 Difference]: Without dead ends: 297 [2023-11-06 22:51:53,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2023-11-06 22:51:53,440 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 2 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:51:53,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 60 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:51:53,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2023-11-06 22:51:53,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 297. [2023-11-06 22:51:53,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 1.2195945945945945) internal successors, (361), 296 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:51:53,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 361 transitions. [2023-11-06 22:51:53,457 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 361 transitions. Word has length 151 [2023-11-06 22:51:53,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:51:53,457 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 361 transitions. [2023-11-06 22:51:53,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.207547169811321) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:51:53,458 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 361 transitions. [2023-11-06 22:51:53,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2023-11-06 22:51:53,462 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:51:53,462 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:51:53,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:51:53,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:51:53,669 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:51:53,669 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:51:53,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1092106235, now seen corresponding path program 8 times [2023-11-06 22:51:53,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:51:53,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7123062] [2023-11-06 22:51:53,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:51:53,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:51:53,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:51:56,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3836 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2023-11-06 22:51:56,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:51:56,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7123062] [2023-11-06 22:51:56,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7123062] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:51:56,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934835076] [2023-11-06 22:51:56,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:51:56,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:51:56,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:51:56,607 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:51:56,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:51:56,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:51:56,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:51:56,875 INFO L262 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-06 22:51:56,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:51:57,044 INFO L134 CoverageAnalysis]: Checked inductivity of 3836 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2023-11-06 22:51:57,045 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:52:00,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3836 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2023-11-06 22:52:00,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934835076] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:52:00,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:52:00,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 105 [2023-11-06 22:52:00,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972163724] [2023-11-06 22:52:00,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:52:00,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2023-11-06 22:52:00,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:00,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2023-11-06 22:52:00,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2023-11-06 22:52:00,854 INFO L87 Difference]: Start difference. First operand 297 states and 361 transitions. Second operand has 105 states, 105 states have (on average 2.104761904761905) internal successors, (221), 105 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:01,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:52:01,271 INFO L93 Difference]: Finished difference Result 595 states and 774 transitions. [2023-11-06 22:52:01,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2023-11-06 22:52:01,272 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.104761904761905) internal successors, (221), 105 states have internal predecessors, (221), 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 203 [2023-11-06 22:52:01,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:52:01,275 INFO L225 Difference]: With dead ends: 595 [2023-11-06 22:52:01,275 INFO L226 Difference]: Without dead ends: 401 [2023-11-06 22:52:01,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2023-11-06 22:52:01,280 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 2 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:52:01,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 60 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:52:01,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2023-11-06 22:52:01,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 401. [2023-11-06 22:52:01,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 1.1625) internal successors, (465), 400 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:01,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 465 transitions. [2023-11-06 22:52:01,296 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 465 transitions. Word has length 203 [2023-11-06 22:52:01,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:52:01,296 INFO L495 AbstractCegarLoop]: Abstraction has 401 states and 465 transitions. [2023-11-06 22:52:01,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.104761904761905) internal successors, (221), 105 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:01,297 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 465 transitions. [2023-11-06 22:52:01,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2023-11-06 22:52:01,302 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:52:01,302 INFO L195 NwaCegarLoop]: trace histogram [102, 102, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:01,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:01,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:01,516 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:52:01,516 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:01,517 INFO L85 PathProgramCache]: Analyzing trace with hash -696784493, now seen corresponding path program 9 times [2023-11-06 22:52:01,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:01,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743976667] [2023-11-06 22:52:01,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:01,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:01,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:10,721 INFO L134 CoverageAnalysis]: Checked inductivity of 11740 backedges. 0 proven. 10404 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2023-11-06 22:52:10,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:10,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743976667] [2023-11-06 22:52:10,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743976667] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:52:10,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037010230] [2023-11-06 22:52:10,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:52:10,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:10,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:10,723 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:10,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:52:19,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2023-11-06 22:52:19,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:52:19,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-06 22:52:19,745 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:21,769 INFO L134 CoverageAnalysis]: Checked inductivity of 11740 backedges. 1 proven. 1335 refuted. 0 times theorem prover too weak. 10404 trivial. 0 not checked. [2023-11-06 22:52:21,770 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:52:24,496 INFO L134 CoverageAnalysis]: Checked inductivity of 11740 backedges. 1 proven. 1335 refuted. 0 times theorem prover too weak. 10404 trivial. 0 not checked. [2023-11-06 22:52:24,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037010230] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:52:24,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:52:24,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 33, 33] total 167 [2023-11-06 22:52:24,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655853271] [2023-11-06 22:52:24,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:52:24,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 167 states [2023-11-06 22:52:24,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:24,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2023-11-06 22:52:24,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7475, Invalid=20247, Unknown=0, NotChecked=0, Total=27722 [2023-11-06 22:52:24,511 INFO L87 Difference]: Start difference. First operand 401 states and 465 transitions. Second operand has 167 states, 167 states have (on average 2.4491017964071857) internal successors, (409), 167 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:25,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:52:25,521 INFO L93 Difference]: Finished difference Result 790 states and 1046 transitions. [2023-11-06 22:52:25,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2023-11-06 22:52:25,522 INFO L78 Accepts]: Start accepts. Automaton has has 167 states, 167 states have (on average 2.4491017964071857) internal successors, (409), 167 states have internal predecessors, (409), 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 307 [2023-11-06 22:52:25,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:52:25,526 INFO L225 Difference]: With dead ends: 790 [2023-11-06 22:52:25,527 INFO L226 Difference]: Without dead ends: 596 [2023-11-06 22:52:25,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 717 GetRequests, 552 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6324 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=7475, Invalid=20247, Unknown=0, NotChecked=0, Total=27722 [2023-11-06 22:52:25,531 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 304 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:52:25,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 188 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:52:25,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2023-11-06 22:52:25,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 595. [2023-11-06 22:52:25,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 594 states have (on average 1.2171717171717171) internal successors, (723), 594 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:25,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 723 transitions. [2023-11-06 22:52:25,555 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 723 transitions. Word has length 307 [2023-11-06 22:52:25,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:52:25,556 INFO L495 AbstractCegarLoop]: Abstraction has 595 states and 723 transitions. [2023-11-06 22:52:25,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 167 states, 167 states have (on average 2.4491017964071857) internal successors, (409), 167 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:25,557 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 723 transitions. [2023-11-06 22:52:25,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2023-11-06 22:52:25,564 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:52:25,565 INFO L195 NwaCegarLoop]: trace histogram [103, 103, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:25,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:25,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 22:52:25,765 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:52:25,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:25,766 INFO L85 PathProgramCache]: Analyzing trace with hash -175079087, now seen corresponding path program 10 times [2023-11-06 22:52:25,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:25,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319826118] [2023-11-06 22:52:25,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:25,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:26,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:34,869 INFO L134 CoverageAnalysis]: Checked inductivity of 16345 backedges. 0 proven. 10609 refuted. 0 times theorem prover too weak. 5736 trivial. 0 not checked. [2023-11-06 22:52:34,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:34,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319826118] [2023-11-06 22:52:34,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319826118] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:52:34,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645761549] [2023-11-06 22:52:34,870 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:52:34,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:34,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:34,872 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:34,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:52:35,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:52:35,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:52:35,381 INFO L262 TraceCheckSpWp]: Trace formula consists of 1483 conjuncts, 105 conjunts are in the unsatisfiable core [2023-11-06 22:52:35,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:35,756 INFO L134 CoverageAnalysis]: Checked inductivity of 16345 backedges. 0 proven. 10609 refuted. 0 times theorem prover too weak. 5736 trivial. 0 not checked. [2023-11-06 22:52:35,756 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:52:49,887 INFO L134 CoverageAnalysis]: Checked inductivity of 16345 backedges. 0 proven. 10609 refuted. 0 times theorem prover too weak. 5736 trivial. 0 not checked. [2023-11-06 22:52:49,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645761549] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:52:49,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:52:49,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106, 106] total 211 [2023-11-06 22:52:49,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562964466] [2023-11-06 22:52:49,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:52:49,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 211 states [2023-11-06 22:52:49,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:49,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 211 interpolants. [2023-11-06 22:52:49,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22155, Invalid=22155, Unknown=0, NotChecked=0, Total=44310 [2023-11-06 22:52:49,903 INFO L87 Difference]: Start difference. First operand 595 states and 723 transitions. Second operand has 211 states, 211 states have (on average 2.052132701421801) internal successors, (433), 211 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:51,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:52:51,339 INFO L93 Difference]: Finished difference Result 1191 states and 1551 transitions. [2023-11-06 22:52:51,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 210 states. [2023-11-06 22:52:51,345 INFO L78 Accepts]: Start accepts. Automaton has has 211 states, 211 states have (on average 2.052132701421801) internal successors, (433), 211 states have internal predecessors, (433), 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 405 [2023-11-06 22:52:51,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:52:51,350 INFO L225 Difference]: With dead ends: 1191 [2023-11-06 22:52:51,351 INFO L226 Difference]: Without dead ends: 805 [2023-11-06 22:52:51,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 914 GetRequests, 705 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=22155, Invalid=22155, Unknown=0, NotChecked=0, Total=44310 [2023-11-06 22:52:51,355 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 2 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:52:51,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 212 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:52:51,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2023-11-06 22:52:51,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 805. [2023-11-06 22:52:51,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 804 states have (on average 1.1604477611940298) internal successors, (933), 804 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:51,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 933 transitions. [2023-11-06 22:52:51,386 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 933 transitions. Word has length 405 [2023-11-06 22:52:51,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:52:51,387 INFO L495 AbstractCegarLoop]: Abstraction has 805 states and 933 transitions. [2023-11-06 22:52:51,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 211 states, 211 states have (on average 2.052132701421801) internal successors, (433), 211 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:51,388 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 933 transitions. [2023-11-06 22:52:51,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 616 [2023-11-06 22:52:51,406 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:52:51,406 INFO L195 NwaCegarLoop]: trace histogram [208, 208, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:51,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:51,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 22:52:51,615 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:52:51,615 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:51,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1764590783, now seen corresponding path program 11 times [2023-11-06 22:52:51,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:51,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107372173] [2023-11-06 22:52:51,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:51,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:52,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:25,218 INFO L134 CoverageAnalysis]: Checked inductivity of 49000 backedges. 0 proven. 43264 refuted. 0 times theorem prover too weak. 5736 trivial. 0 not checked. [2023-11-06 22:53:25,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:25,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107372173] [2023-11-06 22:53:25,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107372173] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:53:25,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209867400] [2023-11-06 22:53:25,219 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:53:25,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:25,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:53:25,223 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:53:25,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a21b633-3121-429d-92a0-5f393721ab89/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process